Difference between revisions of "AddOns"

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== AddOns source code repository ==

The AddOns source code is hosted in [http://svn.osgeo.org/grass/grass-addons/ GRASS-AddOns SVN repository].
== Overview ==

To checkout:
'''[http://grass.osgeo.org/grass7/manuals/addons/ GRASS GIS 7 Addons Manual pages] - a complete overview of available Addons'''

svn checkout https://svn.osgeo.org/grass/grass-addons
== Building and installing AddOns ==

== Building and installing Addons ==
=== Common users ===

See the [[Compile and Install#Addons|compile and install]] wiki page.
'''Graphical user interface:'''<br>
We recommend to use the [[wxGUI]] [[WxGUI#Extension Manager|Extension Manager]] (''Settings -> Addon extensions -> Install extensions from addons'') to install Addons.

In GRASS 6.4 and newer you can use the {{cmd|g.extension}} module, e.g. to install <tt>r.fuzzy.system</tt> run:
'''Command line:'''<br>
You can also use the {{cmd|g.extension}} module, e.g. to install <tt>r.fuzzy.system</tt> run:

  g.extension extension=r.fuzzy.system
  g.extension extension=r.fuzzy.system

To remove installed Addons run
To remove installed AddOns run

  g.extension extension=r.fuzzy.system operation=remove
  g.extension extension=r.fuzzy.system operation=remove
=== Power users (not recommended for Windows users) ===
For manual compiling see the [[Compile and Install#Addons|compile and install]] wiki page.
== AddOns source code repository ==
The AddOns source code is hosted in [https://github.com/osgeo/grass-addons GRASS-AddOns Github repository].

== Adding something new ==
== Adding something new ==
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e.g. at the top of a shell script:
e.g. at the top of a shell script:
<source lang=bash>
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[script follows]
[script follows]

=== Coding standards ===
=== Coding standards ===

Please have a look at our {{src|SUBMITTING}} for C-programs, {{src|SUBMITTING_PYTHON}} for Python scripts or {{src|SUBMITTING_SCRIPTS|branch=branches/develbranch_6}} for Bash scripts coding standards before submitting here.
Please have a look at our {{src|SUBMITTING}} for C-programs and {{src|SUBMITTING_PYTHON}} for Python scripts before submitting here.

=== Documenting your code ===
=== Documenting your code ===
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* [http://trac.osgeo.org/grass/browser/grass-addons/tools/csv_dequote.pl csv_dequote.pl] is a Perl script to convert comma separated .csv files (including "quoted" text strings containing commas) into a form ready for {{Cmd|v.in.ascii}}. Comma separators are converted to pipes (|), commas in quoted strings are preserved, and "quotes" are removed where it is appropriate to do so. It doesn't need GRASS to run, but it does need the Text::CSV Perl Module (<tt>apt-get install libtext-csv-perl</tt>).<BR>'''Author''': Hamish Bowman
* [http://trac.osgeo.org/grass/browser/grass-addons/tools/csv_dequote.pl csv_dequote.pl] is a Perl script to convert comma separated .csv files (including "quoted" text strings containing commas) into a form ready for {{Cmd|v.in.ascii}}. Comma separators are converted to pipes (|), commas in quoted strings are preserved, and "quotes" are removed where it is appropriate to do so. It doesn't need GRASS to run, but it does need the Text::CSV Perl Module (<tt>apt-get install libtext-csv-perl</tt>).<BR>'''Author''': Hamish Bowman

== GRASS 6.x (current) ==
==GRASS 7.x (current)==
* todo: move this content to [[AddOns/GRASS6]]
: (requires an update of the mediawiki AddOnCmd macro to be more like the versioned html doc macro)
See also
svn co https://svn.osgeo.org/grass/grass-addons/grass6/
=== Vector add-ons ===
See also
svn co https://svn.osgeo.org/grass/grass-addons/grass6/vector
==== v.adehabitat.clusthr, v.adehabitat.kernelUD, v.adehabitat.mcp ====
: Tools to calculate home ranges of animals
: '''Author:''' Clement Calenge
Available via SVN or {{cmd|g.extension}}:
svn co https://svn.osgeo.org/grass/grass-addons/grass6/vector/adehabitat
==== v.append ====
: [http://web.archive.org/web/20060914172621/http://www.public.asu.edu/~cmbarton/files/grass_scripts/v.append v.append] is a shell script combining two vector files AND their associated attribute tables. The vector files should be of the same type and, for best results, should have identically formatted attribute tables.
: ''Note'': also module ''v.patch'' can be used for this task.
: '''Author:''' Michael Barton
==== v.autokrige ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/vector/v.autokrige/v.autokrige.py v.autokrige] achieves automatic ordinary kriging from GRASS sites (vector point data), using R with spgrass6 (RGRASS) and automap packages.
: '''Author:''' Mathieu Grelier
==== v.breach ====
: [http://www.sieczka.org/programy_en.html v.breach] creates vector maps of lines and points of continously lowering elevation down the input watercourses, based on the input raster DEM.
: '''Author:''' Maciej Sieczka
==== v.colors ====
: {{cmd|v.colors}} ''moved into main archive''
==== v.count.points.sh ====
: [http://wiki.iosa.it/dokuwiki/spatial_analysis:feature_count v.count.points.sh] counts point features in areas, generates table good as input to d.vect.chart.
: '''Author:''' Stefano Costa
==== v.digatt ====
: [http://phygeo7.geo.uni-augsburg.de/gis2/scripts/v.digatt v.digatt] (shell script) Interactively assign numeric table attributes to series of vector objects. It is meant to be effective by avoiding to type in the attribute value for all single objects again and again. The user is prompted for typing in an attribute value which is assigned to all objects selected by mouseclick afterwards. Next the display is redrawn after updating the table column. Zooming allows to change the region before the old value can be reused or a new one can be typed in (or copied by mouse from another object) in order to assign it to the next series of objects etc. It is tested not very extensively yet. Therefore better work with a copy of your map and consider using v.digit or d.what.vect -e alternatively. [http://phygeo7.geo.uni-augsburg.de/gis2/scripts/v.digatt.png screenshot].
: '''Author:''' Andreas Philipp
==== v.dip ====
: [http://marcin.slodkowski.googlepages.com/v.dip.tgz v.dip] creates points of thickness vectors from the vectors of strike and dip angles. The v.dip is the main ANSI C core program. Program so-called v.dip can run without GRASS environment.
: '''Author:''' Marcin Slodkowski
==== v.flip ====
: [http://www.sieczka.org/programy_en.html v.flip] flips the direction of selected vector lines (redundant since GRASS 6.3 - there is "v.edit tool=flip").
: '''Author:''' Maciej Sieczka
==== v.group ====
: [http://www.shockfamily.net/cedric/grass/v.group v.group] generates a new vector map with the same geometry as an existing map. The new map has categories and a table based on grouping by the values in certain columns of the existing map's table. The values in these columns are preserved in the table for the new map. It's like a v.reclass that preserves data.
: '''Author:''' Cedric Shock
==== v.in.gama ====
: Converts [http://www.gnu.org/software/gama/ GNU GaMa] XML output file to a GRASS vector map layer.
:'''Author:''' Martin Landa
svn co https://svn.osgeo.org/grass/grass-addons/grass6/vector/v.in.gama
==== v.in.geodesic ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/vector/v.in.geodesic v.in.geodesic] is a shell script which will create a new vector map containing a great circle line. The user may either define a beginning and end coordinate, or define a starting coordinate along with initial azimuth and desired line length.
: '''Author:''' Hamish Bowman
==== v.in.geoplot ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/vector/v.in.geoplot v.in.geoplot] converts a [http://www.geoscan-research.co.uk/page9.html/ Geoplot] ASCII export file to a GRASS vector map layer.
:'''Author:''' Benjamin Ducke
svn co https://svn.osgeo.org/grass/grass-addons/grass6/vector/v.in.geoplot
==== v.in.gshhs ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/vector/v.in.gshhs v.in.gshhs] imports [http://www.soest.hawaii.edu/pwessel/gshhs/index.html GSHHS] shorelines into a GRASS vector map. GSHHS data are automatically reprojected to the current location.
:'''Authors:''' several, updated to GRASS 6 by Markus Metz
==== v.in.marxan ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/vector/v.in.marxan v.in.marxan] is a python script that imports Marxan output data for display in a vector grid file prepared using v.out.marxan.
: ''see also the [http://www.uq.edu.au/marxan/ Marxan]
: '''Author:''' Trevor Wiens
==== v.in.mbsys_fnv ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/vector/v.in.mbsys_fnv v.in.mbsys_fnv] imports [[MB-System]] navigation files into a GRASS vector map. You can choose from swath area coverage, track lines (including outer port/starboard edges), all bounds as points, etc. An attribute database is created containing the vital statistics of the specified feature such as track length or swath coverage (geodesic), start stop time and location, pitch, roll, heave, etc. See also the [[#v.in.p190]] addon.
:'''Author:''' Hamish Bowman
==== v.in.ncdc ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/vector/v.in.ncdc v.in.ncdc] imports an [http://www.ncdc.noaa.gov NCDC] stn file (station data) into a GRASS vector map.
: '''Author:''' Huidae Cho
==== v.in.osm ====
: [http://kripton.kripserver.net/software/v.in.osm/ v.in.osm]: OpenStreetMap import into GRASS. Yet only supports deprecated API 0.4, will be modified to work with API 0.5 some time soon.
: '''Author:''' Jannis Achstetter
: See also [http://hamish.bowman.googlepages.com/gpsdrivefiles#osm osm2grass.sh] by H Bowman
==== v.in.osm2 ====
: [https://trac.osgeo.org/grass/browser/grass-addons/grass6/vector/v.in.osm2 v.in.osm2]: OpenStreetMap import into GRASS. Supports current API 0.6, downloads using the [http://wiki.openstreetmap.org/wiki/Xapi Xapi] interface and imports using GpsBabel 1.3.5 or newer. GpsBabel restricts to either nodes or ways being imported at a time, not both. Use {{cmd|v.patch}} to rejoin them. (''work in progress'')
: '''Author:''' Hamish Bowman
==== v.in.ovl ====
: [http://grasslab.gisix.com/scripts/v.in.ovl/ v.in.ovl] is a shell script that imports an ASCII vector file created with TOP10|25|50 or similar products.
: '''Author:''' Peter Löwe
==== v.in.p190 ====
: [https://trac.osgeo.org/grass/browser/grass-addons/grass6/vector/v.in.p190 v.in.p190] is a shell script that imports 'Centre of Source' "S" navigation data from seismic P1/90 (UKOOA) data files and writes it either GRASS vector points or vector lines format. Optionally it will export the navigation data into .csv text files as well. ''Currently in the functional prototype stage, some assembly is required. See inside the shell script for details.'' For working with SEG-Y data, see also the [[#v.in.mbsys_fnv]] addon.
: '''Author:''' Hamish Bowman
==== v.in.ply ====
* GRASS 6: [https://trac.osgeo.org/grass/browser/grass-addons/grass6/vector/v.in.ply v.in.ply] is a shell script that imports a PLY file and writes it as GRASS vector points. For a much more advanced version, see the GRASS 7 version.
: '''Author:''' Markus Neteler
* GRASS 7: [https://trac.osgeo.org/grass/browser/grass-addons/grass7/vector/v.in.ply v.in.ply] is a C program that imports a PLY file and writes it as GRASS vector map.
: '''Author:''' Markus Metz
==== v.in.postgis ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/vector/v.in.postgis/v.in.postgis.py v.in.postgis] Create a GRASS layer from any sql query on PostGIS data.
: '''Author:''' Mathieu Grelier
==== v.in.redwg ====
: [http://lists.gnu.org/archive/html/info-libredwg/2010-08/msg00000.html v.in.redwg imports DWG files into GRASS.]
:'''Author:''' Rodrigo Rodrigues da Silva
svn co https://svn.osgeo.org/grass/grass-addons/grass6/vector/v.in.redwg
==== v.krige ====
: [[V.krige_GSoC_2009 | v.krige]] aims to integrate R functions for kriging (packages automap, gstat, geoR) in a trasparent way. '''Moved into trunk/devbr6 code (r40048)'''
: '''Author:''' Anne Ghisla, as Google Summer of Code 2009 project
: See also [[GRASS_AddOns#v.autokrige]] by Mathieu Grelier
==== v.lda.py ====
* '''Spatial Analysis Tools'''
: [http://www.public.asu.edu/~cmbarton/files/grass_scripts/v.lda.py v.lda.py] is a Python script for calculating Ian Johnson's (U. Sidney) Local Density Analysis values. This can be used in two ways. When only one vector points file is entered, it serves to measure clustering of point data at different neighborhood radii. When two different point files are entered, it measures the the co-occurence of the points from the two files. There is an option to export the data into a cvs format file for easy plotting in a spreadsheet or statistical program like R.
==== v.nn.py ====
* '''Spatial Analysis Tools'''
: [http://www.public.asu.edu/~cmbarton/files/grass_scripts/v.nn.py v.nn.py] is a Python script for calculating the nearest neighbor coefficient of a single vector points file--as an index of clustering--or of two points files--to provide an index of the correspondence between the points in one file and points in a different file.
==== v.ldm ====
:[https://raw.github.com/amuriy/GRASS-scripts/master/v.ldm v.ldm] Shell script to compute "Linear Directional Mean" of vector lines, to display LDM graphics on the graphic monitor, and optionally to save it to vector line and update attribute table with LDM parameters.
:See [http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#/How_Linear_Directional_Mean_works/005p0000001r000000/ this link] for full LDM description.
: '''Author:''' Alexander Muriy
Available via SVN or {{cmd|g.extension}}:
svn co https://svn.osgeo.org/grass/grass-addons/grass6/vector/v.ldm/
==== v.line.center ====
: [http://www.sieczka.org/programy_en.html v.line.center] creates a points vector map with each point located in the middle of the length of the input vector line.
: '''Author:''' Maciej Sieczka
==== v.lmeasure ====
: [http://web.archive.org/web/20060827192321/http://ngeo.de/grassstuff/v.lmeasure v.lmeasure] and [http://web.archive.org/web/20060827060303/http://ngeo.de/grassstuff/v.revlmeasure v.revlmeasure] are two perl scripts that place equidistant vector points along a given arbitrary vector line starting from the beginning or end of the vector line, respectively. Resulting  vector points are labeled with the distance from origin.
: '''Author:''' Mats Schuh
==== v.mainchannel ====
: [https://svn.osgeo.org/grass/grass-addons/grass6/vector/v.strahler/v.mainchannel.html v.mainchannel] is a shell script which finds the main channel of a basin starting from the vector file of the stream network.
: '''Author:''' Ivan Marchesini, Annalisa Minelli
Available via SVN or {{cmd|g.extension}}:
svn co https://svn.osgeo.org/grass/grass-addons/grass6/vector/v.strahler/v.mainchannel.sh
==== v.mk_circle ====
: [http://tekmap.ns.ca/blog/grass_mk_circle v.mk_circle] is a program to create a closed vector at a user defined location and size. The program supports output of different shapes, open boundaries and closed centroids, and will accept multiple locations and sizes from an ASCII file or standard input. GRASS 7 version is also available.
: '''Author:''' Bob Covill
==== v.mkhexgrid ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/vector/v.mkhexgrid v.mkhexgrid] is a python script that creates a hexagonal grid the size of the selected region using user specified side lengths or areas. This has been updated 2011-09-14.
: '''Author:''' Trevor Wiens
==== v.out.ascii.db ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/vector/v.out.ascii.db v.out.ascii.db] is a shell script for exporting vector point data coordinates and selected attribute columns to either a file or to the console.
: ''Superseded in GRASS 6.4 by the new v.out.ascii columns= option.''
: '''Author:''' Hamish Bowman
==== v.out.ascii.mat ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/vector/v.out.ascii.mat v.out.ascii.mat] is a shell script for exporting vector polygon and polyline data into an ASCII text file suitable for loading into Matlab (or [http://www.gnu.org/software/octave/ Octave]).
: '''Author:''' Hamish Bowman
==== v.out.geoserver ====
: [http://www.wgug.org/index.php?option=com_content&view=article&id=56&Itemid=9 v.out.geoserver] is a shell script for exporting vector data to [http://geoserver.org GeoServer] directly. It uses: v.out.ogr, curl, zip and GeoServer REST interface.
: '''Author:''' Pawel Netzel
==== v.out.gmt ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/vector/v.out.gmt v.out.gmt] is a shell script that exports a polygon vector file into GMT xy file. psbasemap code was copied from Hamish's r.out.gmt.
: '''Author:''' Huidae Cho, Hamish Bowman, Dylan Beaudette
==== v.out.kml ====
: [http://grasslab.gisix.com/scripts/v.out.kml/ v.out.kml] is a shell script that exports a vector file into a KML file for Google Earth or Worldwind. see also [[#r.out.kml|r.out.kml]] and [[#r.out.gmap|r.out.gmap]]
: '''Author:''' Peter Löwe
==== v.out.marxan ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/vector/v.out.marxan v.out.marxan] is a python script that prepares vector layers and exports GRASS vector attributes and adjacency information as Marxan input files. Output from Marxan simulations can be imported using v.in.marxan.
: ''see also the [http://www.uq.edu.au/marxan/ Marxan]
: '''Author:''' Trevor Wiens
==== v.out.ply ====
: [https://trac.osgeo.org/grass/browser/grass-addons/grass6/vector/v.out.ply v.out.ply] is a shell script that exports a GRASS vector points cloud into a PLY file.
: '''Author:''' Markus Neteler
==== v.out.svg ====
: [http://svg.cc/assvg/grass.html v.out.svg] is a module that exports SVG notation along with optional attribute data directly from GRASS 6.x vector layers. Now part of [http://svn.osgeo.org/grass/grass/trunk/vector/v.out.svg/ grass6-svn].
: '''Author:''' Klaus Förster
==== v.points.cog ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/vector/v.points.cog v.points.cog] is a shell script which will create a new point at the center of gravity of each cluster of input points or centroids, grouped by attribute. Among other things this is useful for labeling swarms of points.
: '''Author:''' Hamish Bowman
==== v.profile ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/vector/v.profile v.profile] is vector map profiling tool similar to r.profile. This module will print out distance and attributes to points/lines along profiling line. It's also usefull to determine places where raster profile crosses vector features (i.e. where to place river marker on river walley crossection).
: '''Author:''' Maris Nartiss
==== v.random.cover ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/vector/v.random.cover v.random.cover] is a shell script for creating random points constrained within an irregularly shaped vector area. (v.random places points only in current region rectangle). Optionally the user can upload raster values at the points. See also '<tt>r.random cover= vector_output=</tt>'
: '''Author:''' Hamish Bowman
==== v.rasterbounds ====
: [http://les-ejk.cz/programs v.rasterbounds] is a shell script for creating polygon-vector file of rasterfile boundaries. The best version of GRASS is 6.1+. If you are using GRASS < 6.1, you  have to be in the same mapset as your raster maps are from.
: '''Author:''' Jachym Cepicky
==== v.rast.stats2 ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/vector/v.rast.stats2 v.rast.stats2] is an adapted version of the GRASS module v.rast.stats. It uses the grass addon [http://trac.osgeo.org/grass/browser/grass-addons/grass6/raster/r.univar.zonal r.univar.zonal] to speed up calculation of univariate statistics from a GRASS raster map based on vector polygons.
: '''Authors:''' Markus Neteler, Otto Dassau
==== v.sample.buffer ====
* ''Currently unavailable. Being re-written in python. Target for inclusion in addons svn is January 2011''
''v.sample.buffer'' is a shell script that samples rasters in buffers of a specified size around features in a specified vector file. Sampling results are added as attributes to the vector file. This script was designed for sampling vegetation indices and DEM derived attributes for bird point counts. Sampling results can be one or more basic statistics such as mean, range, max, etc.
: '''Author:''' Trevor Wiens
==== v.select.region ====
: [ftp://gsca.nrcan.gc.ca/outgoing/Patton/Grass/Scripts/v.select.region.tar.bz2 v.select.region] is a shell script that prints out the names of all vectors matching an input search pattern that has geometry (points, line, areas) that fall within a region bounded by an existing vector map, or within the current Grass region.
: '''Author:''' Eric Patton
==== v.selmany ====
: [http://svn.osgeo.org/grass/grass-addons/grass6/vector/v.selmany/v.selmany v.selmany] is a shell script that allows to interactively select a set of vector objects on a given layer, then assign them attribute values in a connected database table. The script runs on the command line prompt and within a graphic monitor ; it does not work with DBF driver.
: '''Author:''' Vincent Bain
==== v.surf.icw ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/vector/v.surf.icw v.surf.icw] is an IDW interpolation method using true distance cost instead of euclidean shortest distance, i.e. ''as the fish swims around an island'' not ''as the bird flies''. This will cleanly travel around hard barriers and a cost surface map may be used to model expensive-cross barriers. Input data points do not need direct line of sight to be considered, but should be kept to less than one hundred as the module becomes very computationally expensive. A number of radial basis function options are available. ([http://grass.osgeo.org/wiki/Image:Inlets_03_SurfSal_icw_big.png screenshot])
: '''Author:''' Hamish Bowman
==== v.surf.idwpow ====
: [http://www.geospatial.it/allegri/grass/v.surf.idwpow.zip v.surf.idwpow] integrates the common v.surf.idw algorithm with the exponential parameter for the distance weights
: '''Author:''' Giovanni Allegri
==== v.surf.krige [deprecated: use v.autokrige instead] ====
: v.surf.krige is a script that do a surface interpolation from vector point data by Kriging method. The interpolated value of a cell is determined by using an omnidirectional variogram model fitted starting from model parameter given by user shown from the experimental semi variogram produced by v.variogram. The script can perform also the Leave-One-out cross validation to test the variogram model "fitted by eye" and an automatic fitted variogram model. The cross validation helps the user to choose the best variogram model to interpolate own data.
: '''Author:''' Pierluigi De Rosa.
==== v.strahler ====
: [http://www.pois.org/florian/downloads/grass/v.strahler.tgz v.strahler] is a module that calculates the Strahler Order for all lines of a given dendritic network.
: '''Author:''' Florian Kindl. Available via SVN or {{cmd|g.extension}}:
svn co https://svn.osgeo.org/grass/grass-addons/grass6/vector/v.strahler
==== v.swathwidth ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/vector/v.swathwidth v.swathwidth] creates a vector map representing the sea bottom coverage of a multibeam (swath) sonar survey.
: ([http://david.p.finlayson.googlepages.com/swathwidth Screenshots])
: '''Authors:''' David Finlayson, Hamish Bowman
==== v.thickness ====
: [http://marcin.slodkowski.googlepages.com/v.thickness.tgz v.thickness] creates points of thickness vectors from the vectors of strike and dip angles.The v.thickness is GUI GRASS script for v.dip.
: '''Author:''' Marcin Slodkowski
==== v.transect.kia ====
: [https://svn.osgeo.org/grass/grass-addons/grass6/vector/v.transect.kia v.transect.kia] calculates kilometric abundance indexes (KIA), a common indirect presence index used in wildlife monitoring along line transect surveys.
: Path lenghts can be corrected by draping on a DEM, different type of point objects can be weighted according to their relative importance, and paths can be  segmented using a further polygon vector (to calculate, say, abundances per elevation range or per habitat class).
: The module is written in bash and needs a GRASS install compiled with sqlite support.
: '''Author:''' Clara Tattoni and Damiano G. Preatoni
==== v.transects ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/vector/v.transects v.transects] is a python script that creates a set of equidistant lines (transects) that are perpendicular to an input vector line file. Points and quadrilateral areas are alternative outputs.
: '''Author:''' Eric Hardin
==== v.trees3d ====
: [http://les-ejk.cz/programs/ v.trees3d] is a module for making 3D trees from input vector point file.
: '''Author:''' Jachym Cepicky
==== v.triangle ====
: [https://raw.github.com/amuriy/GRASS-scripts/a7df12d996abfe6461f509fce6feb6c869af2d5e/v.triangle v.triangle] -- front-end for <Triangle> utility (http://www.cs.cmu.edu/~quake/triangle.html) of J.R. Shewchuk.
Makes exact Delaunay triangulations, constrained Delaunay triangulations, conforming Delaunay triangulations and high-quality triangular meshes. In GIS terminology, it produces 2D TIN, optionally with "breaklines".
For more details see GRASS-wiki page [http://grass.osgeo.org/wiki/TIN_with_breaklines TIN with breaklines].
: '''Author:''' Alexander Muriy
==== v.trimesh ====
: [http://www.valledemexico.ambitiouslemon.com/vtrimesh.html v.trimesh] creates a triangular mesh from a vector map using areal constraints for refinement. It uses Jonathan Shewchuk's Triangle library.
: '''Author:''' Jaime Carrera
Available via SVN or {{cmd|g.extension}}:
svn co https://svn.osgeo.org/grass/grass-addons/grass6/vector/v.trimesh/
==== v.to.averline ====
: [https://raw.github.com/amuriy/GRASS-scripts/a7df12d996abfe6461f509fce6feb6c869af2d5e/v.to.averline v.to.averline] is a shell script to find "average" line(s) of input vector map. It works with simple algorithm stated [http://forums.arcgis.com/threads/26757-quot-Averaging-quot-lines?p=88781&viewfull=1#post88781 here] (2 methods -- average distance to vectors sampling or average number of vectors segments).   
: '''Author:''' Alexander Muriy
==== v.to.equidist ====
: [https://raw.github.com/amuriy/GRASS-scripts/master/v.to.equidist v.to.equidist] is a shell script that generates vector points or line segments along a given vector line(s) with the equal distances (uses v.segment) 
: '''Author:''' Alexander Muriy
==== v.what.rast.buffer ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/vector/v.what.rast.buffer v.what.rast.buffer] is a script that calculates univariate statistics of raster map(s) from buffers around vector points. Results are written to a file. Resolution is taken from each input map.
: ''see also the [http://starspan.casil.ucdavis.edu StarSpan] software
: '''Author:''' Hamish Bowman
==== v.variogram ====
* [deprecated: use v.autokrige instead]
: v.variogram is a script that create an omnidirectional experimental semi-variogram. This scripts require R-statistics software installed on your machine. Now the script is updated to run on spgrass6 >= 0.3 and sp >= 0.9 [http://grass.osgeo.org/pipermail/statsgrass/2006-October/000455.html reply].
: '''Author:''' Ivan Marchesini, Pierluigi De Rosa.
==== v.vect.stats ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/vector/v.vect.stats v.vect.stats] counts the number of points falling into each polygon and optionally calculates statistics from numeric point attributes for each polygon. v.vect.stats is a C module for GRASS 6.4 and 6.5 (see enclosed patch for 6.5, applies also to 6.4.2) and included in GRASS 7.
: '''Author:''' Markus Metz
==== AniMove ====
: [http://www.faunalia.it/animov/ AniMove] is software for analysis of animal movement and ranging behaviour using QGIS+GRASS+R.
:'''Authors:''' Support by Faunalia.it
==== Utilities ====
===== Shapemerge =====
: [http://perrygeo.googlecode.com/svn/trunk/gis-bin/shpmerge.sh shpmerge] merges all the shapefiles in the current directory into a single output shapefile
:'''Authors:''' Perrygeo
=== Raster add-ons ===
See also:
svn co http://svn.osgeo.org/grass/grass-addons/grass6/raster
==== Raplat ====
GRASS-RaPlaT: The Radio Planning Tool for GRASS GIS system developed by support of Slovenian largest mobile operator Mobitel. It is especially designed for radio coverage calculation of GSM/UMTS systems, but can be applied also to other wireless systems in the frequency range 400 MHz – 2.4 GHz (e.g. TETRA, WiFi). Its structure is modular and characterized by high level of flexibility and adaptability.
* Documentation: http://commsys.ijs.si/en/component/content/article/54-software/149-user-manual
* Software: http://commsys.ijs.si/en/software/grass-raplat
: '''Author:''' Department of Communication Systems, Jozef Stefan Institue, Jamova 39, SI-1000 Ljubljana, Slovenia
==== r.area ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/raster/r.area r.area] Very simple module. Calculate area size (in cells) for every individual category in input raster map and write number of cells as the value of each cell in the area. Optionally write a binary coverage map and set a minimum area threshold. Works well with {{cmd|r.clump}}.
: '''Author:''' Jarek Jasiewicz
==== r.basin ====
: [http://svn.osgeo.org/grass/grass-addons/grass6/raster/r.basin/ r.basin] Generates the main morphometric parameters of the basin starting from the digital elevation model and the coordinates of the basin's closing section (see [http://grass.osgeo.org/wiki/R.basin wiki] for howto).
: '''Author:''' Margherita Di Leo, Massimo Di Stefano
Available via SVN or {{cmd|g.extension}}:
svn co https://svn.osgeo.org/grass/grass-addons/grass6/raster/r.basin/
==== r.bilateral ====
: [http://les-ejk.cz/files/programs/grass/r.bilateral.tgz r.bilateral] Bilateral filter is an edge-preserving filter, which combines domain and range filtering. It is written in C language.
: '''Author:''' Jachym Cepicky
==== r.broscoe ====
: r.broscoe.sh calculates waerden test and t test statistics for some values of threshold area on a single basin, according to A.J.Broscoe theory (1959). Dependence: v.strahler package.
: '''Authors:''' Ivan Marchesini, Annalisa Minelli
Available via SVN or {{cmd|g.extension}}:
svn co https://svn.osgeo.org/grass/grass-addons/grass6/vector/v.strahler/
==== r.boxcount ====
: r.boxcount and r.boxcount.sh calculate the fractal dimension for a given map. These are versions for grass6 of [http://www.ucl.ac.uk/~tcrnmar/ Mark Lake's modules] for grass43.
: '''Authors:''' Mark Lake, grass6 port: Florian Kindl.
Available via SVN or {{cmd|g.extension}}:
svn co https://svn.osgeo.org/grass/grass-addons/grass6/raster/r.boxcount/
svn co https://svn.osgeo.org/grass/grass-addons/grass6/raster/r.boxcount.sh/
==== r.burn.frict ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/raster/r.burn.frict r.burn.frict] converts vector geometries to raster cells, using a simple anti-aliasing method to close "gaps" between diagonal cells. Useful for "burning" vector geometries into a friction surface, making sure that simulated movement does not "slip" through converted cells that have only diagonal neighbours.
:'''Author:''' Benjamin Ducke
svn co https://svn.osgeo.org/grass/grass-addons/grass6/raster/r.burn.frict
==== r.clump2 ====
: [https://trac.osgeo.org/grass/browser/grass-addons/grass6/raster/r.clump2 r.clump2] is a C module similar to r.clump. Differences are: diagonally adjacent cells are also clumped but can be excluded, NULL (nodata) cells are always excluded, and selective clumping with start coordinates is supported.
: '''Author:''' Markus Metz
svn co https://svn.osgeo.org/grass/grass-addons/grass6/raster/r.clump2
==== r.colors.out_sld ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/raster/r.colors.out_sld r.colors.out_sld] is a shell script used to export the color table associated with a raster map layer to an OGC [http://docs.geoserver.org/latest/en/user/styling/sld-cookbook/rasters.html SLD] XML file, for use with [[GeoServer]] and the ilk.
: '''Author:''' Hamish Bowman
==== r.colors.out_vtk ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/raster/r.colors.out_vtk r.colors.out_vtk] is a shell script used to export the color table associated with a raster map layer to a {{wikipedia|VTK}} XML file. (see also [[Help with 3D]])
: '''Author:''' Hamish Bowman
==== r.colors.quantiles ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/raster/r.colors.quantiles/r.colors.quantiles r.colors.quantiles] is a shell script used to create raster colors rules based on nquantiles. It uses R and spgrass6 package (RGRASS).
: '''Authors:''' Mathieu Grelier
==== r.colors.stddev ====
: [http://hamish.bowman.googlepages.com/grass_color_maps r.colors.stddev] ''moved into main archive''
==== r.connectivity.distance ====
: [http://svn.osgeo.org/grass/grass-addons/grass6/raster/r.connectivity.distance r.connectivity.distance] is a shell script, which is - as a part of the r.connectivity.* tool-chain - intended to make connectivity analysis based on graph-theory more easily available to conservation planning. r.connectivity.distance computes the (cost) distance between all habitat patches of an input vector map within a user defined euclidean distance threshold.<BR>See also [[#r.connectivity.network]] and  [[#r.connectivity.corridors]]
: '''Author:''' Stefan Blumentrath, [http://www.nina.no NINA]
Available via SVN or {{cmd|g.extension}}:
svn co https://svn.osgeo.org/grass/grass-addons/grass6/raster/r.connectivity.distance/
==== r.connectivity.network ====
: [http://svn.osgeo.org/grass/grass-addons/grass6/raster/r.connectivity.network r.connectivity.network] is a shell script, which is - as a part of the r.connectivity.* tool-chain - intended to make connectivity analysis based on graph-theory more easily available to conservation planning. r.connectivity.network performs the (core) network analysis and computes connectivity measures for a set of habitat patches based on graph-theory (usig the igraph-package in R).<BR>See also [[#r.connectivity.distance]] and  [[#r.connectivity.corridors]]
: '''Author:''' Stefan Blumentrath, [http://www.nina.no NINA]
Available via SVN or {{cmd|g.extension}}:
svn co https://svn.osgeo.org/grass/grass-addons/grass6/raster/r.connectivity.network/
==== r.connectivity.corridors ====
: [http://svn.osgeo.org/grass/grass-addons/grass6/raster/r.connectivity.corridors r.connectivity.corridors] is a shell script, which is - as a part of the r.connectivity.* tool-chain - intended to make connectivity analysis based on graph-theory more easily available to conservation planning. r.connectivity.corridors computes corridors between habitat patches for edges from r.connectivity.network based on (cost) distance raster maps from r.connectivity.distance and assigns user defined weight to the corridors.<BR>See also [[#r.connectivity.distance]] and  [[#r.connectivity.network]]
: '''Author:''' Stefan Blumentrath, [http://www.nina.no NINA]
Available via SVN or {{cmd|g.extension}}:
svn co https://svn.osgeo.org/grass/grass-addons/grass6/raster/r.connectivity.corridors/
==== r.convergence ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/raster/r.convergence r.convergence] calculate topographic convergence index, useful to detect lineamets represented by chanell/ridge system
: '''Author:''' Jarek Jasiewicz
==== r.cpt2grass ====
: [http://hamish.bowman.googlepages.com/grass_color_maps r.cpt2grass] is a GRASS script for importing a [http://www.soest.hawaii.edu/gmt/ GMT] .cpt color table into GRASS. It can save to a text file suitable for r.colors or automatically apply the color table to a raster map.<BR>For a large collection of GMT .cpt files see http://sview01.wiredworkplace.net/pub/cpt-city/
: Other palette ideas from [http://geography.uoregon.edu/datagraphics/color_scales.htm Univ. Oregon] and [http://oceancolor.gsfc.nasa.gov/PRODUCTS/colorbars.html NASA/Goddard's OceanColor] (latter partially translated for use with GRASS on the [http://trac.osgeo.org/grass/browser/grass-addons/grass6/raster/r.colors.tools/palettes grass-addons SVN]).
: '''Author:''' Hamish Bowman
==== r.csr ====
: [https://svn.osgeo.org/grass/grass-addons/grass6/raster/r.csr r.csr] integrates several Grass programs to produce colored, shaded-relief rasters in one step. Accepts single or multiple elevation/bathymetry maps as input; optionally will fill data holidays with 3x3 median filter, multiple times, if required; can apply color maps from a) input raster, b) another raster in MAPSET, or c) from a rules file; otherwise, rainbow colorbar is applied. Output colored, shaded-relief rasters can optionally be exported to tiff format if the appropriate flag is given. Shading parameters can be modified, though useful defaults are given.
: '''Author:''' Eric Patton
==== r.cva ====
: [http://www.ucl.ac.uk/~tcrnmar/GIS/r.cva.html r.cva] is a cumulative viewshed analysis module. It is an advanced version of the {{cmd|r.los}} program.
: '''Author:''' [http://www.ucl.ac.uk/~tcrnmar/ Mark Lake]
Available via SVN or {{cmd|g.extension}}:
  svn co https://svn.osgeo.org/grass/grass-addons/grass6/raster/r.cva/
==== r.denoise ====

: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/raster/r.denoise r.denoise] denoises (smooths/despeckles) topographic data, particular DEMs derived from radar data (including SRTM), using Xianfang Sun's [http://www.cs.cf.ac.uk/meshfiltering/index_files/Page342.htm denoising algorithm].  It is designed to preserve sharp edges and to denoise with minimal changes to the original data.  See the [http://trac.osgeo.org/grass/browser/grass-addons/grass6/raster/r.denoise/description.html manual pages] for details.  Further information on Sun's denoising algorithm, including an example, is available [http://personalpages.manchester.ac.uk/staff/neil.mitchell/mdenoise/ here].
* See [[AddOns/GRASS 7]]

: '''Author:''' John Stevenson
== GRASS 6.x (previous) ==

==== r.dominant_dir.m and r.calc_terraflow_dir.m ====
* See [[AddOns/GRASS 6]]
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/raster/r.terraflow.tools dominant_dir.m and calc_terraflow_dir.m] are two Matlab scripts for determining the dominant flow direction from a r.terraflow MFD map and converting into a GRASS aspect map for use with d.rast.arrow, etc.
: '''Author:''' Hamish Bowman
==== r.diversity ====
: [http://svn.osgeo.org/grass/grass-addons/grass6/raster/r.diversity/ r.diversity] calculates selected diversity indices by calling various r.li commands.This script uses the [http://grass.osgeo.org/grass64/manuals/html64_user/r.li.pielou.html Pielou], [http://grass.osgeo.org/grass64/manuals/html64_user/r.li.renyi.html Renyi], [http://grass.osgeo.org/grass64/manuals/html64_user/r.li.shannon.html Shannon] and [http://grass.osgeo.org/grass64/manuals/html64_user/r.li.simpson.html Simpson] indices. The output is a map for each index.
: '''Author:''' Luca Delucchi, Duccio Rocchini
==== r.eucdist ====
: [http://david.p.finlayson.googlepages.com/r.eucdist r.eucdist] creates a raster map estimating the euclidean distance from known cells.
: '''Author:''' David Finlayson
==== r.forestfrag ====
: [http://dl.dropbox.com/u/10445979/r.forestfrag.sh r.forestfrag.sh] creates forest fragmentation index from a GRASS raster map (where forest=1, non-forest=0) based on a method developed by Riitters et. al (2000). So far only running/tested on GRASS 6.4 and only with 3x3 moving window (shell-script has to be adjusted for other window-sizes)
: '''Author:''' Maning Sambale, Stefan Sylla
==== r.fragment ====
: [http://www.chrisgarstin.com/stuff/r.fragment r.fragment] fragments a raster into a user-defined set of smaller tiles according to an input number of rows and columns.
: '''Author:''' Eric Patton
==== r.fuzzy ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/raster/r.fuzzy r.fuzzy] Calculates membership of every cell in raster according membership function defined by user.
: '''Author:''' Jarek Jasiewicz
==== r.fuzzy.logic ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/raster/r.fuzzy.logic r.fuzzy.logic] Perform fuzzy operators (AND, OR, NOT, IMP) on membership's map using T-norms and T-conorms for 6 most popular families.
: '''Author:''' Jarek Jasiewicz
==== r.fuzzy.system ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/raster/r.fuzzy.system r.fuzzy.system] Perform full fuzzy clasificationwith 6 most popular fuzzy logic families and few methods of deffuzification.
: '''Author:''' Jarek Jasiewicz
svn co https://svn.osgeo.org/grass/grass-addons/grass6/raster/r.fuzzy.system
==== r.game_of_life ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/raster/r.game_of_life r.game_of_life] is a shell script which runs Conway's classic Game of Life using GRASS raster modules. It is meant to demonstrate how easy it is to program cellular automata in GRASS as well as various 3D raster volume and time series visualization techniques.
: '''Author:''' Hamish Bowman
==== r.gauss ====
: [http://www.les-ejk.cz/files/programs/grass/r.gauss.tgz r.gauss] is Gaussian and Laplacian of Gaussian filter for GRASS. It is written in C language.
:'''Author:''' Jachym Cepicky
==== r.gradgrid4 ====
: [http://www.uibk.ac.at/geographie/personal/mergili/gradgrid4.zip gradgrid4] is a tool for interpolating values of discrete data points to a raster map, applying a local regression approach with a predictor raster. The model is based on shell and python scripts as well as an R batchfile. It was tested on Fedora Core 6 with GRASS 6.2.1 and R 2.5.1, but should work under most UNIX systems. After unzipping the gradgrid4 folder, store it at any place in your local file system. In the subfolder docs you can find a manual and a publication draft with a detailed description of the concept and the example of an application. The subfolder testloc constitutes a GRASS location with test data.
: '''Author:''' Martin Mergili
==== r.hazard.flood ====
: [http://svn.osgeo.org/grass/grass-addons/grass6/raster/r.hazard.flood/ r.hazard.flood] is an implementation of a fast procedure to detect flood prone areas. The exposure to flooding may be delineated by adopting a topographic index (TIm) computed from a DEM. The portion of a basin exposed to flood inundation is generally characterized by a TIm higher than a given threshold, tau. The threshold is automatically determinated from the cellsize. The proposed procedure may help in the delineation of flood prone areas especially in basins with marked topography. The use of the modified topographic index should not be considered as an alternative to standard hydrological-hydraulic simulations for flood mapping, but it may represent a useful and rapid tool for a preliminary delineation of flooding areas in ungauged basins and in areas where expensive and time consuming hydrological-hydraulic simulations are not affordable or economically convenient.
: '''Author:''' Margherita Di Leo
Available via SVN or {{cmd|g.extension}}:
svn co https://svn.osgeo.org/grass/grass-addons/grass6/raster/r.hazard.flood/
==== r.hydrdem ====
'''r.hydrodem''' applies hydrological conditioning (sink removal) to a required input elevation map. If the conditioned elevation map is going to be used as input elevation for r.watershed, only small sinks should be removed and the amount of modifications restricted with the mod option. For other modules such as r.terraflow or third-party software, full sink removal is recommended.
: '''Author:''' Markus Metz
Available via SVN or {{cmd|g.extension}}:
svn co https://svn.osgeo.org/grass/grass-addons/grass7/raster/r.hydrodem/
==== r.in.ign ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/raster/r.in.ign/ r.in.ign] imports raster data from [http://api.ign.fr IGN WMS-C stream service]. Yet an uncompleted version, briefly documented [http://grass.osgeo.org/wiki/IGN_wms-c_stream here].
: '''Author:''' Vincent Bain
Available via SVN or {{cmd|g.extension}}:
svn co https://svn.osgeo.org/grass/grass-addons/grass6/raster/r.in.ign/
==== r.in.mb ====
: [http://www.tekmap.ns.ca/blog/multibeam_import r.in.mb] is a "GRASS/[[MB-System]] program designed to import ''mbio'' compatible multibeam sonar data directly into the GRASS GIS. The program is a modified version of {{cmd|r.in.xyz}}. Instead of reading an ASCII XYZ file, ''r.in.mb'' reads an MB-System compatible list file." It can do automatic reprojection and minor hole filling. Options for restricting data according to line length, speed, acrosstrack width, beam number and survey mode (Simrad only). The default is to import bathymetry data, but optionally amplitude or sidescan sonar data can be loaded instead. GRASS 7 version is also available.
: '''Author:''' Bob Covill
==== r.in.onearth ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/raster/r.in.onearth r.in.onearth] <!-- old version: [http://www-pool.math.tu-berlin.de/~soeren/grass/modules/ r.in.onearth] --> for download and import satellite images direct from the NASA OnEarth WMS server into GRASS.
: '''Authors:''' Soeren Gebbert, Markus Neteler, Hamish Bowman
==== r.in.srtm.region ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass7/raster/r.in.srtm.region r.in.srtm.region] for download and import of SRTM for the current region. If needed, tiles are patched together and optionally holes interpolated.
: '''Author:''' Markus Metz
==== r.in.swisstopo ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/raster/r.in.swisstopo/ r.in.swisstopo] for importing swisstopo digital elevation model data into GRASS raster maps.
: '''Author:''' J&uuml;rgen Hansmann
Available via SVN or {{cmd|g.extension}}:
svn co https://svn.osgeo.org/grass/grass-addons/grass6/raster/r.in.swisstopo/
==== r.in.wms (.py) ====
: [http://les-ejk.cz/files/programs/grass/r.in.wms.tgz r.in.wms] for download and import maps direct from  WMS servers into GRASS. This script is written in Python Programming language. Note GRASS 6.2+ provides a shell script version of r.in.wms, take care of which one is actually being run.
: '''Author:''' Jachym Cepicky
==== r.in.xyz.auto ====
: [https://trac.osgeo.org/grass/browser/grass-addons/grass6/raster/r.in.xyz.auto r.in.xyz.auto] runs the {{Cmd|r.in.xyz}} module, automatically setting up the region extent for you. ''For useful output it is strongly recommended to manually set the region resolution and bounds yourself instead of using this script.''
: '''Author:'''  Hamish Bowman
==== r3.in.xyz ====
: [https://trac.osgeo.org/grass/browser/grass-addons/grass6/raster3d/r3.in.xyz r3.in.xyz] creates a 3D raster map from an assemblage of many coordinates using univariate statistics. It is the 3D version of {{Cmd|r.in.xyz}}.
: '''Author:''' Hamish Bowman
==== r.inund.fluv ====
: [https://svn.osgeo.org/grass/grass-addons/grass6/raster/r.inund.fluv/ r.inund.fluv]This command allows to obtain a fluvial potentially inundation map given a high-resolution DTM of the area surrounding the river and a water surface profile calculated through an 1-D hydrodinamic model.
: '''Authors:''' Roberto Marzocchi, Bianca Federici, Domenico Sguerso
==== r.isoregions ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/raster/r.isoregions/r.isoregions r.isoregions] allows isoregions creation from a GRASS raster map.
: '''Authors:''' Mathieu Grelier
==== r.interp.mask ====
: [http://david.p.finlayson.googlepages.com/r.interp.mask r.interp.mask] Creates a user-specified buffer around interpolation points that can be used as a MASK to prevent or clip excessive extrapolation artifacts. This works much better than a standard convex hull around the points.
: '''Author:''' David Finlayson
==== r.ipso ====
: [http://svn.osgeo.org/grass/grass-addons/grass6/raster/r.ipso/ r.ipso] Produces the ipsometric and ipsographic curve related to a digital elevation model and prints the percentiles
: '''Authors:''' Margherita Di Leo, Massimo Di Stefano, Francesco Di Stefano
Available via SVN or {{cmd|g.extension}}:
svn co https://svn.osgeo.org/grass/grass-addons/grass6/raster/r.ipso/
==== r.li ====
: [http://www.faunalia.it/download/r_li/ r.li] is a more flexible and faster replacement of the old r.le. '''''Moved into 6.3-SVN'''''.
: '''Authors:''' Claudio Porta, Davide Spano, Serena Pallecchi, [http://www.faunalia.it Faunalia]
==== r.local_max.pl ====
: [http://les-ejk.cz/files/programs/local_max.pl Local maxima] is a Perl script for <code>r.mapcalc</code>. It detects local maxima of the image.
: '''Author:''' Jachym Cepicky
==== r.mandelbrot ====
: [http://grasslab.gisix.com/scripts/r.mandelbrot r.mandelbrot] is a shell script to calculate the Mandelbrot set.- for GRASS versions 6.X.
: '''Author:''' Peter Löwe
==== r.maxent.lambdas ====
: [http://svn.osgeo.org/grass/grass-addons/grass6/raster/r.maxent.lambdas r.maxent.lambdas] is a shell script to compute raw and/or logistic prediction maps from a lambdas file produced with MaxEnt 3.3.3e.<BR>See also [[#r.out.maxent_swd]]
: '''Author:''' Stefan Blumentrath, [http://www.nina.no NINA]
Available via SVN or {{cmd|g.extension}}:
svn co https://svn.osgeo.org/grass/grass-addons/grass6/raster/r.maxent.lambdas/
==== mcda ====
: mcda suite is a toolset for geographics multi-criteria decision aiding and data analysis based on ELECTRE (r.mcda.electre), REGIME (r.mcda.regime) and FUZZY (r.mcda.fuzzy) algorithm. The module r.roughset is also included  for geographics rough set analisys and knowledge discovery based on rough set library. It is written in C language for GRASS versions 6.X.
: '''Author:''' Gianluca Massei (g_massa@libero.it ) - Antonio Boggia
Available via SVN or {{cmd|g.extension}}:
svn co https://svn.osgeo.org/grass/grass-addons/grass6/raster/mcda/
==== r.modis ====
:The '''r.modis''' suite is a toolset to import MODIS satellite data in GRASS GIS. It uses the [http://gis.cri.fmach.it/pymodis/ pyModis library] and the MODIS Reprojection Tool software to convert, mosaik and process MODIS data. It is written in Python language for GRASS 7, developed during the Google Summer of Code 2011.
See also [[R.modis]]:
: '''Author:''' Luca Delucchi (GSoC mentor: Markus Neteler)
Available via SVN or {{cmd|g.extension}}:
svn co https://svn.osgeo.org/grass/grass-addons/grass7/raster/r.modis/
==== r.mlv ====
: [http://les-ejk.cz/files/programs/grass/r.mlv.tgz r.mlv] is Mean of least variance filter for GRASS. It is an edge-preserving (or even edge-enhacing) filter, which should serve for removing additive noise from images. It is written in C language.
: '''Author:''' Jachym Cepicky
==== r.obstruction, r.planning.static, r.planning.cinematic ====
: [http://www.ing.unitn.it/~grass/software.html r.obstruction, r.planning.static, r.planning.cinematic]: r.obstruction creates a polar obstruction map from a DTM. r.planning.static performs a static planning for GPS and Glonass surveys using the obstruction map created with r.obstruction. r.planning.cinematic performs a cinematic planning for GPS and Glonass surveys. (University of Trento, Faculty of Engineering)
: '''Author:''' Daniele Carli, Dimitri D'Inca', Gianluca Fruet, Domenico Sguerso, Paolo Zatelli
==== r.out.colorbar ====
: [http://tekmap.ns.ca/blog/colorbar_out r.out.colorbar] is an export program for saving GRASS raster colorbars to an image. The program uses GTK+ and cairographics. Supported export formats are PNG, PDF, and EPS.
: '''Author:''' Bob Covill
==== r.out.jpeg ====
: [http://www.geospatial.it/allegri/grass/r.out.jpeg_ r.out.jpeg] is a simple GRASS script to export georeferenced JPEG images from rasters, keeping the associated color table. It is a two-step export: first a ppm file is created, then it is converted to jpeg usgin the "convert" command from ImageMagick
: '''Author:''' Giovanni Allegri
==== r.out.geoserver ====
: [http://www.wgug.org/index.php?option=com_content&view=article&id=56&Itemid=9 r.out.geoserver] exports GRASS raster layer to [http://geoserver.org GeoServer] and publishes it using WMS. The modul is a shell script. It uses: r.out.gdal, curl, xmlstarlet and GeoServer REST interface.
: '''Author:''' Pawel Netzel
==== r.out.gmap ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/raster/r.out.gmap r.out.gmap] outputs GRASS raster map into set of image tiles
following the tiling scheme of Google Maps and Microsoft Virtual Earth.<BR>Read more in the OSGeo Journal [http://www.osgeo.org/journal Volume 5 (2009, to appear)]<BR>see also [[#r.out.kml|r.out.kml]] and [[#v.out.kml|v.out.kml]]
: '''Author:''' Tomas Cebecauer
==== r.out.gmt ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/raster/r.out.gmt r.out.gmt] is a GRASS script for exporting a GRASS raster map into a [http://www.soest.hawaii.edu/gmt/ GMT] grid file. It also creates a GMT color table from the data and can generate some GMT commands for plotting a postscript file. (code is experimental, but functional)<BR>see  also
: '''Authors:''' Hamish Bowman, Dylan Beaudette
==== r.out.gmt2 ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/raster/r.out.gmt2 r.out.gmt2] is a modified version of Hamish's r.out.gmt.  Added options for title, xlabel, ylabel, comment, and map width.  Removed any settings that can be changed by gmtset for more flexibility.
: '''Author:''' Huidae Cho, Hamish Bowman, Dylan Beaudette
==== r.out.kap_template ====
: [https://trac.osgeo.org/grass/browser/grass-addons/grass6/raster/r.out.kap_template r.out.kap_template] is a shell script that exports a raster map into a GeoTiff and a metadata text file suitable for use with KAP (BSB) raster nautical chart converter programs such as <tt>tif2bsb</tt> (after verifying that you are legally entitled to use such a tool).
: '''''This is EXPERIMENTAL software. NOT FOR NAVIGATIONAL USE.'''''
: For an easy to use data viewer, see also the [http://www.opencpn.org OpenCPN] free navigational software.
: '''Author:''' Hamish Bowman
==== r.out.kml ====
: [https://trac.osgeo.org/grass/browser/grass-addons/grass6/raster/r.out.kml r.out.kml] is a shell script that exports a raster map into a KML file and image for Google Earth or Worldwind. See also [[#v.out.kml|v.out.kml]] and [[#r.out.gmap|r.out.gmap]].
: '''Author:''' Hamish Bowman
==== r.out.maxent_swd ====
: [http://svn.osgeo.org/grass/grass-addons/grass6/raster/r.out.maxent_swd r.out.maxent_swd] is a shell script to produce a set of SWD files as input to MaxEnt 3.3.3e using r.stats.<BR>See also [[#r.maxent.lambdas]]
: '''Author:''' Stefan Blumentrath, [http://www.nina.no NINA]
Available via SVN or {{cmd|g.extension}}:
svn co https://svn.osgeo.org/grass/grass-addons/grass6/raster/r.out.maxent_swd/
==== r.pack ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/raster/r.pack r.pack] and [http://trac.osgeo.org/grass/browser/grass-addons/grass6/raster/r.unpack r.unpack] are two GRASS scripts for transferring raster maps to another computer as a single compressed file including color table etc.
: An earlier version has been renamed as [http://trac.osgeo.org/grass/browser/grass-addons/grass6/raster/r.pack/experiment r.pack.mat] and [http://trac.osgeo.org/grass/browser/grass-addons/grass6/raster/r.unpack/experiment r.unpack.mat].
: '''Author:''' Hamish Bowman
==== r.pi ====
: [https://svn.osgeo.org/grass/grass-addons/grass6/raster/r.pi/ r.pi] (raster patch index) provides various functions to analyse spatial attributes of a landscape. It has a focus on patch-based indices but delivers class-based indices as well. r.le and its successor r.li provide landscape indices.
: '''Authors:''' Programming: Elshad Shirinov, Scientific concept: Dr. Martin Wegmann
==== r.prominence ====
: '''r.prominence''' calculates the average difference between a central cell and its neighbors. It approximated the terrain 'ruggedness' by looking at average differences in elevation within a given neighborhood.
: '''Author:''' Benjamin Ducke
Available via SVN or {{cmd|g.extension}}:
svn co https://svn.osgeo.org/grass/grass-addons/grass6/raster/r.prominence/
==== r.refine ====
: [http://www.bowdoin.edu/~ltoma/research.html r.refine]: reduces a DEM to a TIN (takes as input a grid DEM and an error margin and simplifies it to the desired accuracy into a TIN)
Available via the source code repository [https://github.com/jonrtodd/r.refine]
: '''Authors:''' Laura Toma and Jonathan Todd
==== r.rifs ====
: [http://www.ucl.ac.uk/~tcrnmar/ r.rifs]: r.rifs generates a raster map and/or image of a fractal by means of the specified random iterated function system.
: '''Author:''' Mark Lake
==== r.roughness ====
[http://trac.osgeo.org/grass/browser/grass-addons/grass6/raster/r.roughness/r.roughness.sh r.roughness.sh] is a shell script to calculate the surface roughness of a DEM, using r.surf.area and v.surf.rst. (for GRASS versions 6.1 and above)
[http://www.igc.usp.br/pessoais/guano/downloads/r.roughness60 r.roughness60] - for GRASS versions 6.0.X
[http://trac.osgeo.org/grass/browser/grass-addons/grass6/raster/r.roughness/r.roughness.window.area r.roughness.window.area] - calculate surface roughness as the ratio of real (surface) area and planar area, using a moving-window approach.
[http://trac.osgeo.org/grass/browser/grass-addons/grass6/raster/r.roughness/r.roughness.window.vector r.roughness.window.vector] - calculate surface roughness as vector dispersion, using a moving-window approach. Resulting maps are: Vector Strength (R) and Inverted Fisher's k parameter.
[http://trac.osgeo.org/grass/browser/grass-addons/grass6/raster/r.roughness/r.roughness.window.vector.html r.roughness.window.vector.html] - provisional help page for r.roughness.window.vector.
: '''Author:''' Carlos Henrique Grohmann
Available via SVN or {{cmd|g.extension}}:
svn co https://svn.osgeo.org/grass/grass-addons/grass6/raster/r.roughness/
==== r.roughset ====
: r.roughset is a module for geographics rough set analisys and knowledge discovery based on rough set library. It is written in C language for GRASS versions 6.X.
: '''Author:''' Gianluca Massei (g_massa@libero.it ) - Antonio Boggia
Available via SVN or {{cmd|g.extension}}:
svn co https://svn.osgeo.org/grass/grass-addons/grass6/raster/mcda/r.roughset/
==== r.seg ====
: '''r.seg''' performs image segmentation and discontinuity detection (based on the Mumford-Shah variational model).
: The module generates a piece-wise smooth approximation of the input raster map and a raster map of the discontinuities of the output approximation. The discontinuities of the output approximation are preserved from being smoothed.
: See [http://www.ing.unitn.it/~vittia/sw here] for details and examples.
Available [http://www.ing.unitn.it/~vittia/sw here] and with improvements via SVN:
svn co https://svn.osgeo.org/grass/grass-addons/grass6/raster/r.seg/
: '''Author''' Alfonso Vitti
==== r.smoothpatch ====
: [http://david.p.finlayson.googlepages.com/r.smoothpatch r.smoothpatch] creates a composite of two rasters using a distance-weighted average across the transition to smooth the edges.
: '''Author:''' David Finlayson
==== r.soils.texture ====
: r.soils.texture is a module to define soils texture from sand and clay raster file with a schema text file (now FAO,USDA and ISSS are available). It is written in C language. - for GRASS versions 6.x - For bugs and suggest: g_massa@libero.it
:'''Author:''' Gianluca Massei
Available via SVN or {{cmd|g.extension}}:
svn co https://svn.osgeo.org/grass/grass-addons/grass6/raster/r.soils.texture/
: [https://raw.github.com/amuriy/GRASS-scripts/master/r.split.line r.split.line] is a shell script to split raster into parts with vector line(s).
:'''Author:''' Alexander Muriy
==== r.stack ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/raster/r.stack r.stack] is a shell script used to patch all the raster maps in a time series (or burst 3D raster) together into a vertical stack, to aid multi-map analyses in modules where group input is not yet available.
: '''Author:''' Hamish Bowman
==== r.stream.angle ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/raster/r.stream.angle r.stream.angle] Divide stream network into stright line segments according users input. It extends  Module uses as input direction and stream network map produced by r.watershed and stream.extract  or custom user input. See description for details.
: '''Author:''' Jarek Jasiewicz
Available via SVN or {{cmd|g.extension}}:
svn co https://svn.osgeo.org/grass/grass-addons/grass6/raster/r.stream.angle
==== r.stream.basins ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/raster/r.stream.basins r.stream.basins] delineate basins according users input. It extends r.water.outlet funcionality to extracting more than one basin at one step. Module uses as input direction map produced  stream network produced by r.stream.extract, r.watershed, r.stream order or custom user input. More in tutorial on grass-wiki pages.
: '''Author:''' Jarek Jasiewicz
Available via SVN or {{cmd|g.extension}}:
svn co https://svn.osgeo.org/grass/grass-addons/grass6/raster/r.stream.basins
==== r.stream.del ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/raster/r.stream.del r.stream.del] Calculates downslope length of first order streams and delete them if it length (in pixels) is lower than the treeshold. It also join false segments left by deletion into one with category of upper. It uses r.watershed direction map and r.watershed  stream map as input. The module is added only for r.watershed module, r.stream.extract has deleting short streams build-in. During development of r.stream.* it will be probably abandoned due to duplicate functionality
: '''Author:''' Jarek Jasiewicz
Available via SVN or {{cmd|g.extension}}:
svn co https://svn.osgeo.org/grass/grass-addons/grass6/raster/r.stream.del
==== r.stream.distance ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/raster/r.stream.distance r.stream.distance] Calculates downslope distance and downslope elevation difference between current cell and stream or outlet cells. It uses r.watershed direction map, r.watershed or r.stream.extract stream map and optionally DEM as input.
: '''Author:''' Jarek Jasiewicz
Available via SVN or {{cmd|g.extension}}:
svn co https://svn.osgeo.org/grass/grass-addons/grass6/raster/r.stream.distance
==== r.stream.extract ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/raster/r.stream.extract r.stream.extract] extracts topologically clean stream networks from input elevation and optionally accumulation maps. Output is available as raster and vector and can be used as input for the other r.stream.* modules by Jarek Jasiewicz.
: '''Author:''' Markus Metz
Available via SVN or {{cmd|g.extension}}:
svn co https://svn.osgeo.org/grass/grass-addons/grass6/raster/r.stream.extract
==== r.stream.order ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/raster/r.stream.order r.stream.order] orders stream network outputed by r.watershed or r.stream.extract according Sthrahler, Shreve, Horton and Hack ordering systems. It require as input stream and direction map and optionally accumulation map. It handle both SFD nad MFD modes but all data must come from the same procedure.
: '''Author:''' Jarek Jasiewicz, Markus Metz
Available via SVN or {{cmd|g.extension}}:
svn co https://svn.osgeo.org/grass/grass-addons/grass6/raster/r.stream.order
==== r.stream.pos ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/raster/r.stream.pos r.stream.pos] Helper module for calculating local stream network properties and linear geostatistics. Mostly To use with R and other grass modules.
: '''Author:''' Jarek Jasiewicz
Available via SVN or {{cmd|g.extension}}:
svn co https://svn.osgeo.org/grass/grass-addons/grass6/raster/r.stream.pos
==== r.stream.preview ====
: In order to find a value of upslope area to be used as input to extract the river network using r.stream.extract or r.watershed, it is common to proceed by tentatives. [http://trac.osgeo.org/grass/browser/grass-addons/grass6/raster/r.stream.preview r.stream.preview] is useful for quickly display results for various tentatives of threshold values.
: '''Author:''' Margherita Di Leo
Available via SVN or {{cmd|g.extension}}:
svn co https://svn.osgeo.org/grass/grass-addons/grass6/raster/r.stream.preview/
==== r.stream.stats ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/raster/r.stream.stats r.stream.stats] calculate Hortonian statistics for Stahler or Horton stream network created by r.stream.order. It uses r.watershed direction map, DEM and r.stream.order's Stahler or Horton stream network as input. It outputs calculated statistics to standard output.
: '''Author:''' Jarek Jasiewicz
Available via SVN or {{cmd|g.extension}}:
svn co https://svn.osgeo.org/grass/grass-addons/grass6/raster/r.stream.stats
==== r.surf.nnbathy ====
: [http://www.sieczka.org/programy_en.html r.surf.nnbathy] interpolates a surface from a raster input using Pavel Sakov's [http://code.google.com/p/nn-c/ nn] natural neighbor interpolation library. Provides triangulation, Sibson natural neighbor interpolation and non-Sibsonian interpolation.
: '''Author:''' Maciej Sieczka
==== r.surf.volcano ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/raster/r.surf.volcano r.surf.volcano] creates an artificial surface resembling a seamount or cone volcano. The user can alter the size and shape of the mountain and optionally roughen its surface. Available decay functions are  polynomial, Gaussian, Lorentzian, logarithmic, and exponential.
: '''Author:''' Hamish Bowman
==== r.terracost ====
[http://www.bowdoin.edu/~ltoma/research.html r.terracost] Scalable approach for computing least-cost-path surfaces on massive grid terrains.<BR>'''Lead author''': Laura Toma
Available via SVN or {{cmd|g.extension}}:
  svn co https://svn.osgeo.org/grass/grass-addons/grass6/raster/r.terracost
==== r.threshold ====
[http://svn.osgeo.org/grass/grass-addons/grass6/raster/r.threshold/ r.threshold] Finds a first tentative value of upslope area to be used as input to extract the river network using r.stream.extract or r.watershed.
Available via SVN or {{cmd|g.extension}}:
  svn co https://svn.osgeo.org/grass/grass-addons/grass6/raster/r.threshold
==== r.tileset ====
: ''{{cmd|r.tileset}} moved into main archive''
==== r.to.vect.lines ====
: [https://trac.osgeo.org/grass/browser/grass-addons/grass6/raster/r.to.vect.lines r.to.vect.lines] is a module to sample raster rows at regular intervals and turn them into 3D lines. e.g. to display in [[NVIZ]] as a wiggle plot.
: It demonstrates the use of [[Python_Ctypes_Examples|ctypes]] to access the GRASS C libraries from within a Python script. (treat as a work in progress)
: '''Author:''' Hamish Bowman
==== r.traveltime ====
: [http://jesbergwetter.twoday.net/stories/4845555/ r.traveltime] computes the travel time of surface runoff to an outlet. The program starts at the basin outlet and calculates the travel time at each raster cell recursively. A drainage area related threhold considers even  surface and also channel runoff. Travel times are derived by assuming kinematic wave approximation. The results can be used to derive a time-area function. This might be usefull for precipitation-runoff calculations (estimation of flood predictions) with a lumped hydrologic model (user-specified unit hydrograph).
: '''Author:''' Kristian Förster
==== r.univar.zonal ====
Note: This addon is only needed for GRASS 6.3, its functionality has been added to r.univar in 6.4+ and 7.
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/raster/r.univar.zonal r.univar.zonal] is similar to {{cmd|r.univar}}, but calculates statistics separately for each category(zone) present in the separate input map used to define zones (zonal statistics). The output can be like the one of r.univar or in easier to read table format and can be written to a file.
: '''Author:''' Markus Metz
Available via SVN or {{cmd|g.extension}}:
svn co https://svn.osgeo.org/grass/grass-addons/grass6/raster/r.univar.zonal
==== r.viewshed ====
: r.viewshed is a module for extremely fast line of sight analysis (replaces the slow r.los). It is written in C language for GRASS versions 6.X/7.x.
: '''Author:''' Laura Toma, USA
Available via SVN or {{cmd|g.extension}}:
svn co https://svn.osgeo.org/grass/grass-addons/grass6/raster/r.viewshed
Once {{trac|390}} is solved, it will substitute r.los.
==== r.wavelets ====
: [http://www.ing.unitn.it/~grass/software.html r.wavelets]: This package contains wavelets decomposition and reconstruction modules for the GRASS GIS: r.owave.dec computes the orthogonal wavelet transform of a raster map. r.owave.rec reconstructs a raster map from an orthogonal wavelet transform. r.biowave.dec computes the biorthogonal wavelet transform of a raster map. r.biowave.rec reconstructs a raster map from a biorthogonal wavelet transform.
: '''Authors:''' Members of the University of Trento, Faculty of Engineering
==== r.wf ====
: [http://svn.osgeo.org/grass/grass-addons/grass6/raster/r.wf/ r.wf] produces the Width Function of a basin. The Width Function W(x) gives the number of the cells in a basin at a flow distance x from the outlet (it is also referred as distance-area function). The distance is not the euclidean one, but it is measured along the flowpath towards the outlet.
: '''Authors:''' Margherita Di Leo, Massimo Di Stefano, Francesco Di Stefano
Available via SVN or {{cmd|g.extension}}:
svn co https://svn.osgeo.org/grass/grass-addons/grass6/raster/r.wf/
==== r.xtent ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/raster/r.xtent r.xtent] computes a raster map layer representing the Voronoi diagram, weighted Voronoi diagram or a more complex territorial partitioning of space around points (centers) in a vector input map, based on the XTENT formula.
:'''Author:''' Benjamin Ducke
svn co https://svn.osgeo.org/grass/grass-addons/grass6/raster/r.xtent
==== r.zc.pl ====
: [http://les-ejk.cz/files/programs/zc.pl Zero crossing] is a simple Perl script, finds the ,,zero crossings`` from the Laplacian of Gaussian filter (see above). It is really <em>very</em> simple, the edges don't need to be really on that pixel, where they are detected, no interpolation is performed.
: '''Author:''' Jachym Cepicky
==== GIPE ====
: The GRASS Image Processing Environment (GIPE) has USLE, Energy-balance and radiance-reflectance correction models.
: '''Author:''' Yann Chemin (unless specified otherwise).
svn co https://svn.osgeo.org/grass/grass-addons/grass6/imagery/gipe
Remark: This is progressively moved to main GRASS SVN (aka GRASS 7)
:* r.hydro.CASC2D, ported from GRASS 5.x version, is temporarily here waiting to return to main GRASS.
:* r.soiltex2prop creates porosity, Saturated Hydraulic conductivity (Ksat) and wetting front pressure head (Hf) from percentage of sand and clay after Rawls et al., 1990. This is a must for r.hydro.CASC2D.
:* i.biomass creates biomass growth map from fPAR, lightuse efficiency, water availability (or evap.fraction), Lat, doy and tsw.
:* i.dn2ref.l7, r.dn2ref.ast create top of atmosphere reflectance for Landsat 7ETM+ and ASTER. These modules also have a flag for radiance output. Updated i.dn2ref.l7 to read .met calibration file. 
:* i.dn2full.l[5,7] is an attempt to get all bands of Landsat[5,7] calibrated and corrected to either reflectance or temperature, reads only the .met file. 
:* i.dn2potrad.l[5,7] is an attempt to get ET potential from DN of Landsat 7 (Careful! No Atmospheric correction!). 
:* i.eb.* are a set of 10+ GRASS modules that together perform the main functions of  the SEBAL model (Bastiaanssen, 1995). Those functions include (but are not limited to) Soil heat flux, sensible heat flux, net radiation, evaporative fraction at satellite overpass, diurnal actual evapotranspiration, momentum roughness length, etc. These  modules are also part of any Energy-Balance related processing.
:* i.evapo.potrad creates diurnal Potential evapotranspiration assuming all net radiation becomes ET, according to SEBAL model (Bastiaanssen, 1995). This module also has a flag for diurnal net radiation as required by SEBAL in i.eb.eta.
:* i.evapo.SENAY creates actual evapotranspiration following the regional method of Senay (2007).
:* i.lmf creates a Local Maximum Fitting on the temporal dimension of the multi-date input dataset, working, but more precision still to be added.
:* i.vi.mpi is the mpi version of i.vi for cluster GRASS GIS education (no speed up here!) '''Author:''' Shamim Akhter
:* i.modis.stateqa extracts State Quality Assessment information from Modis 500m (MOD09A) products.
:* i.water creates a Water Mask from NDVI and Albedo, or specifically for Modis: NDVI and Band 7.
:* i.wi creates a given Water Index (only one so far).
==== HydroFOSS ====
: HydroFOSS - a GIS embedded approach for Free & Open Source Hydrological modeling.
: '''Author:''' Massimiliano Cannata
svn co https://svn.osgeo.org/grass/grass-addons/HydroFOSS/
==== Hikereport ====
: python script that computes length, cumulative uphill and downhill, average slopes on an interactively drawn path. Based on r.profile's output.
: '''Author:''' Stefano Negri
=== Misc add-ons===
==== m.eigensystem ====
m.eigensystem - Computes eigen values and eigen vectors for square matrices.
: http://svn.osgeo.org/grass/grass-addons/grass6/misc/m.eigensystem/
: '''Author:''' Michael Shapiro
===Database add-ons===
==== db.join ====
: Table joining: join one table into another through common attributes
: '''Author:''' Markus Neteler. Available via SVN or {{cmd|g.extension}}:
  svn co https://svn.osgeo.org/grass/grass-addons/grass6/database/db.join/
  g.extension db.join
===General add-ons===
==== Compare GRASS maps ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass7/general/g.compare.md5 g.compare.md5] Script to check if two GRASS maps are identical
: '''Author:''' Luca Delucchi
==== GRASS create location scripts ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/general/grass_create_location grass_create_location.sh] Script to generate a new GRASS location from GIS file (e.g. geoTIFF or SHAPE), wktfile or EPSG code.
: '''Author:''' Markus Neteler
==== g.laptop.sh ====
: [http://www.gbd-consult.de/dassau/grass/g.laptop/g.laptop.sh g.laptop.sh] is an interactive shell script to extract raster and vector data from current Location into a new one. Data can be copied or extracted in current or original resolution and region extend. This script was written to extract smaller parts of a GRASS location to be able to present them on a laptop without the necessity to transfer huge data. Maps do not have to be in the same mapset.
: '''Author:''' Otto Dassau
==== Readline completion ====
: '''''Readline completion''''' for GRASS commands under the bash shell: [http://www.sorokine.info/grass-complete/ grass-complete] won't clutter the environment but needs to be installed; [http://dcalvelo.free.fr/grass/grass_rlcompleter.sh grass_rlcompleter.sh] needs almost no installation but will pollute the environment. Grass-Complete currently requires Bash version 2.05 for proper install.
: '''Author:''' Alexandre Sorokine (grass-complete), Daniel Calvelo (grass_rlcompleter.sh)
==== g.region.point ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/general/g.region.point g.region.point] is a shell script which resets the computational region to a square box around a given coordinate. It is intended for use within GRASS scripts to speed up processing by limiting expensive raster calculations to a small area of interest.
: '''Author:''' Hamish Bowman
==== g.linke_by_day ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/raster/r.sun.tools/ g.linke_by_day] is a python script for [[r.sun]] which interpolates a Linke turbidity value for a given day of the year based on monthly values edited into the script.
: '''Author:''' Hamish Bowman
==== g.xlist ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/general/g.xlist g.xlist] is a C implementation of g.mlist. g.xlist searches for data files matching a pattern given by wildcards or POSIX Extended Regular Expressions. POSIX regex(3) functions are required.
: '''Author:''' Huidae Cho
==== g.xremove ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/general/g.xremove g.xremove] is a C implementation of g.mremove. g.xremove removes data files matching a pattern given by wildcards or POSIX Extended Regular Expressions. POSIX regex(3) functions are required.
: '''Author:''' Huidae Cho
==== g.region.ll ====
: [https://bitbucket.org/afrigeri/grass-addons g.region.ll] sets the region in a projected location using longitudes and latitudes.
: '''Author:''' Alessandro Frigeri
=== Imagery add-ons ===
See also
svn co https://svn.osgeo.org/grass/grass-addons/grass6/imagery
==== GIPE ====
GIPE (see also above in raster section) provides:
i.biomass, i.dn2potrad.l5, i.dn2potrad.l7, i.dn2ref.ast, i.eb.deltat, i.eb.disp, i.eb.eta, i.eb.evapfr, i.eb.g0, i.eb.h0, i.eb.h_SEBAL01, i.eb.h_SEBAL95, i.eb.h_iter, i.eb.molength, i.eb.netrad, i.eb.psi, i.eb.rah, i.eb.rohair, i.eb.ublend, i.eb.ustar, i.eb.wetdrypix, i.eb.z0m, i.eb.z0m0, i.evapo.PT, i.evapo.TSA, i.evapo.potrad, i.evapo.senay, i.evapo.time_integration, i.lmf, i.modis.stateqa, i.sattime, i.vi.grid, i.vi.mpi, i.water, i.wi
svn co https://svn.osgeo.org/grass/grass-addons/gipe/
: '''Author:''' Yann Chemin
==== i.despeckle ====
Applies SAR Speckle Filter to a raster power map.  Currently LEE, KUAN, Enhanced Lee and GAMMA filter are implemented.
  g.extension i.despeckle
==== i.histo.match ====
Performs histogram matching on the given input images.
svn co https://svn.osgeo.org/grass/grass-addons/grass7/imagery/i.histo.match
: '''Authors:''' Laura Zampa (PERL version), rewritten and updated by Luca Delucchi, Italy
==== i.homography ====
Rectifies an image by computing a coordinate transformation for each pixel in the image based on the control points created by i.linespoints. The approach uses homography extended for corresponding lines.
svn co https://svn.osgeo.org/grass/grass-addons/grass6/imagery/i.homography
: '''Author:''' Daniel Grasso, Bolzano, Italy, based on code written by Stefano Merler, ITC-irst, Italy
==== i.linespoints ====
An imagery command that enables the user to mark coordinate system points as well as lines on an image to be rectified and then input the coordinates of each point for creation of a coordinate transformation matrix. The transformation matrix is needed as input for the GRASS program i.homography.
svn co https://svn.osgeo.org/grass/grass-addons/grass6/imagery/i.linespoints
: '''Author:''' Daniel Grasso, Bolzano, Italy, based on i.points
==== i.landsat.dehaze ====
Bandwise haze correction using tasscap4 (haze) and linear regression of a Landsat scene.
svn co https://svn.osgeo.org/grass/grass-addons/grass6/imagery/i.landsat.dehaze
: '''Author:''' Markus Neteler
==== i.landsat.toar ====
Transform calibrated digital number of Landsat products to top-of-atmosphere radiance or top-of-atmosphere reflectance and temperature (band 6 of the sensors TM and ETM+). Optionally, used to calculate the at-surface radiance or reflectance with atmospheric correction (DOS method).
Available also in GRASS 7 and GRASS 6.5.
svn co https://svn.osgeo.org/grass/grass-addons/grass6/imagery/i.landsat.toar
: '''Author:''' E. Jorge Tizado
==== i.landsat.acca ====
Implements the Automated Cloud-Cover Assessment (ACCA) Algorithm from Irish (2000) with the constant values for pass filter one from Irish et al. (2006). To do this, it needs Landsat band numbers 2, 3, 4, 5, and 6 (or band 61 for Landsat-7 ETM+) which have already been processed from DN into reflectance and band-6 temperature with i.landsat.toar).
Available also in GRASS 7.
svn co https://svn.osgeo.org/grass/grass-addons/grass6/imagery/i.landsat.acca
: '''Author:''' E. Jorge Tizado
==== i.points.auto ====
This module allows a search of GCP's on two raster-maps with differents levels of automation. The ''manual'' search is the default search, so it's possible to determine the GCP's manually with the mouse (like {{cmd|i.points}}). ''Semiautomated'' search: The user determines with the mouse some correspondent areas (with a discrete precision) in the two maps and the module searches itself the GCP's in these areas. ''Automated'' search: At the start of module the user has to load the maps that the algorithm uses to the search, so it is recommended to use the maps filtered with the filters DIVERSITY or STDDEV (of GRASS) with a window of 3x3 or 5x5 pixels. However, the algorithm sometimes works well with the original maps too.
Note: This code is basically an improved i.points (from 2004). Subsequent changes in i.points haven's been ported here yet.
svn co https://svn.osgeo.org/grass/grass-addons/grass6/imagery/i.points.auto
: '''Authors:''' based on i.points; additions by Ivan Michelazzi, Luca Miori (MSc theses at ITC-irst); Supervisors: Markus Neteler, Stefano Merler, ITC-irst 2003, 2004. [http://gisws.media.osaka-cu.ac.jp/grass04/viewpaper.php?id=37 PDF article]
==== i.points.reproj ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/imagery/i.points.reproj i.points.reproj] is a shell script that will use cs2cs to reproject the target coordinates of a group's POINTS file. By running i.rectify directly to the new target projection, a generation of resampling data loss can be avoided (versus i.rectify + r.proj). On the other hand, i.rectify does not calculate cell resolution well if the map is to be rotated ([http://intevation.de/rt/webrt?serial_num=3296 bug #3296]), in those cases i.rectify+r.proj may be the better option.
: '''Author:''' Hamish Bowman
==== i.plr.py ====
: [[I.plr.py|Probabilistic Label Relaxation]], written in Python
: '''Author:''' Georg Kaspar
==== i.pr ====
: Image classification: implements k-NN (multiclass), classification trees (multiclass), maximum likelihood (multiclass), Support Vector Machines (binary), bagging versions of all the base classifiers, AdaBoost for binary trees and support vector machines. It allows feature manipulation (normalization, principal components,...). It also implements feature selection techniques (RFE, E-RFE,...), statistical tests on variables, tools for resampling (cross-validation and bootstrap) and cost-sensitive techniques for trees and support vector machines.
: '''Author:''' Stefano Merler. Available via SVN or {{cmd|g.extension}}:
  svn co https://svn.osgeo.org/grass/grass-addons/grass6/imagery/i.pr
==== i.spec.sam ====
: Spectral Angle mapping
: '''Author:''' Markus Neteler. Available via SVN or {{cmd|g.extension}}:
  svn co https://svn.osgeo.org/grass/grass-addons/grass6/imagery/i.spec.sam/
==== i.spec.unmix ====
: Spectral unmixing
: '''Author:''' Markus Neteler. Available via SVN or {{cmd|g.extension}}:
  svn co https://svn.osgeo.org/grass/grass-addons/grass6/imagery/i.spec.unmix/
==== i.topo.corr ====
: i.topo.corr is used to topographically correct reflectance from imagery files, e.g. obtained with i.landsat.toar (see above), using a sun illumination terrain model. This illumination model represents the cosine of the incident angle, i.e. the  angle between the normal to the ground and the sun rays. It can be obtained with {{cmd|r.sun}} (parameter incidout), and then calculating its cosine with float precision. Correction methods: cosine, minnaert, percent, c-factor.
  --> the module has been included in main GRASS (GRASS 6.4 and later)
: '''Author:''' E. Jorge Tizado
==== i.warp ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/imagery/i.warp i.warp] is a shell script that will use gdalwarp to rectify a raw input image using thin plate splines. The map should be imported into GRASS with r.in.gdal and GCPs set with i.points. Input is the raw image (GeoTIFF, JPEG, etc). Output is a GeoTIFF in the imagery group's target location's map projection. Requires a recent (early 2006) version of GRASS 6.1, or newer.
: '''Author:''' Hamish Bowman
=== Display add-ons ===
See also
svn co http://svn.osgeo.org/grass/grass-addons/grass6/display
==== d.barb ====
[http://trac.osgeo.org/grass/browser/grass-addons/grass6/display/d.barb d.barb] is a C module that will draw wind barbs, straw plots, and arrow plots from raster array or sparse vector point data. It can use either direction + magnitude, or u + v components as the input, and can produce a legend key. (''work in progress, but it's mostly there'')
: '''Author:''' Hamish Bowman
==== d.edit.rast ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/display/d.edit.rast d.edit.rast] edits cells in an existing raster map displayed on the current monitor.
: '''Author:''' Huidae Cho
==== d.frame.quarter ====
: ('''obsolete''') [http://trac.osgeo.org/grass/browser/grass-addons/grass6/display/d.frame.split d.frame.quarter] is a shell script that will split the display into four quadrants (or sixths) using ''d.frame''. Individual frames are named ''uno, dos, tres, cuatro'', and ''full_screen''.
: Replaced by {{cmd|d.split.frame}} in main.
: '''Author:''' Hamish Bowman
==== d.frame.split ====
: ''d.frame.split moved into main archive as {{cmd|d.split.frame}}''
==== d.frontline ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/display/d.frontline d.frontline] is a shell script that draws frontlines on the graphics monitor using ''d.graph'' module and different types of symbols. Also it optionally saves frontline graphics to ''d.graph'' commands file and/or ''ps.map'' file (for later use with the "read" ''ps.map'' instruction) 
: '''Author:''' Alexander Muriy
==== d.hyperlink ====
: [ftp://gsca.nrcan.gc.ca/outgoing/Patton/Grass/Scripts/d.hyperlink.tar.bz2 d.hyperlink] is an interactive shell script that allows the viewing of hyperlinked images from a vector's attribute table in an external image viewer. Queries can be made via SQL statements or interactive mouse-clicking. The attribute table must be pre-populated with a column containing the image to link the vector to; the user also specifies the image folder in the current MAPSET where the images are located. The script currently supports gimp, Eye of Gnome, gthumb, gpdf, and Inkscape image viewers.
: '''Author: '''Eric Patton
==== d.mark ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/display/d.shortcuts d.mark] is a shell script that quickly displays a marker on the display at a given coordinate.
: '''Author:''' Hamish Bowman
==== d.region.box ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/display/d.region.box d.region.box] is a shell script that quickly displays a box around the current region.
: '''Author:''' Hamish Bowman
==== d.stations ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/display/d.shortcuts  d.stations] is a shell script that quickly displays vector points (or sites for GRASS 5.4 and below).
: '''Author:''' Hamish Bowman
==== d.varea ====
: [http://trac.osgeo.org/grass/browser/grass-addons/grass6/display/d.shortcuts d.varea] is a shell script that quickly displays vector areas.
: '''Author:''' Hamish Bowman
==== d.zoom.keys ====
[https://raw.github.com/amuriy/GRASS-scripts/master/d.zoom.keys d.zoom.keys] is a shell (+awk) script that allows to change the current geographic region settings interactively, with a keyboard. Can use navigation in X-monitor (requires <xev> and <xdotool>) or terminal.
NOTE: tested normally only on Linux (Ubuntu 10.04), on other systems <awk> and other tools may behave differently.
: '''Author:''' Alexander Muriy
Also available via SVN or {{cmd|g.extension}}:
==== pd-GRASS ====
: [http://www.ornl.gov/sci/gist/software/grass/ pd-GRASS]: Parallel Display for GRASS GIS
: '''Author:''' Alex Sorokine
==== [[IconSymbols]] ====
* [[IconSymbols|Symbols]] which can be used with ''d.vect, d.graph'', and ''ps.map''.
==== p.in.labels ====
: [http://tekmap.ns.ca/blog/import_label p.in.labels] is a program to import ASCII xyz (where z is a label) files as GRASS labels. Reads from stdin or existing file.
: '''Author:''' Bob Covill
=== Postscript add-ons ===
* ''See also [[ps.map scripts|ps.map samples and templates]]''.
==== ps.atlas ====
: [http://les-ejk.cz/programs/grass/ps.atlas ps.atlas] is a shell script that makes more maps on current region according to input *.psmap file. General map can be stored as vector file. The resulting *.eps maps can be automatically converted to *.pdf files.
: '''Author:''' Jachym Cepicky
==== ps.output ====
: [https://trac.osgeo.org/grass/browser/grass-addons/grass6/postscript/ps.output ps.output] is much like {{cmd|ps.map}} but with advanced decorations and ability for translucency. Here you can find a [[Ps.output|tutorial]].
: '''Author:''' Jorge Tizado
==== [[AreaFillPatterns]] ====
* Hatches for ps.map's vareas
=== wxGUI add-ons ===
===GRASS and UMN Mapserver===
* [http://www.mail-archive.com/mapserver-users@lists.umn.edu/msg00086.html See interesting posting]
* See wiki [[GRASS and MapServer]] page
==GRASS 7.x (in development)==
* See [[AddOns/GRASS7]]

==GRASS 5.x (old)==
==GRASS 5.x (old)==

See also
* See [[AddOns/GRASS 5]]
svn co https://svn.osgeo.org/grass/grass-addons/grass5/
=== Sites addons ===
* [http://www.tigers.ru/grass_docs/progs/DESCRIPTION.html Parallelized s.surf.idw] using MPI. ([http://babelfish.yahoo.com/translate_url?doit=done&tt=url&intl=1&fr=bf-home&trurl=http%3A%2F%2Fwww.tigers.ru%2Fgrass_docs%2Fprogs%2FDESCRIPTION.html&lp=ru_en&btnTrUrl=Translate babelfish translation])
: '''Author''': Alexei Popov, Russia.
=== Raster addons ===
* [http://www.valledemexico.ambitiouslemon.com/gwmodelling.html r.gmtg] The groundwater modelling tool for grass. A module to use MODFLOW within GRASS. <BR>'''Author''': Jaime Carrera
* [http://www.bowdoin.edu/~ltoma/research.html r.terracost] Scalable approach for computing least-cost-path surfaces on massive grid terrains. For GRASS 5.3.<BR>'''Lead author''': Laura Toma
: Newer version available via SVN or {{cmd|g.extension}}:
  svn co https://svn.osgeo.org/grass/grass-addons/raster/r.terracost

==GRASS 4.x (very old)==
==GRASS 4.x (very old)==

===Raster add-ons===
* See [[AddOns/GRASS 4]]
* MAGICAL Software: The MAGICAL software comprises a suite of three programs that provide a multi-agent simulation extension for the GRASS GIS software. http://www.ucl.ac.uk/~tcrnmar/simulation/magical/magical.html


Latest revision as of 07:29, 25 June 2020

This page contains references to user contributions and add-ons (the original GRASS GIS software can be downloaded here).


GRASS GIS 7 Addons Manual pages - a complete overview of available Addons

Building and installing AddOns

Common users

Graphical user interface:
We recommend to use the wxGUI Extension Manager (Settings -> Addon extensions -> Install extensions from addons) to install Addons.

Command line:
You can also use the g.extension module, e.g. to install r.fuzzy.system run:

g.extension extension=r.fuzzy.system

To remove installed AddOns run

g.extension extension=r.fuzzy.system operation=remove

Power users (not recommended for Windows users)

For manual compiling see the compile and install wiki page.

AddOns source code repository

The AddOns source code is hosted in GRASS-AddOns Github repository.

Adding something new

How to obtain write-access

Please read how to get write access to the GRASS-Addons-SVN repository and contact the grass-dev mailing list if you would like to host your module there.

Please announce your add-on to the GRASS users' mailing list so that others may be aware of your work. Also please consider adding your module to one of the Applications pages.

Copyright and licensing information

Please be sure to include copyright and licensing information in the header comments of your code so that others may know how they can use, extend, modify, and redistribute your work.

e.g. at the top of a shell script:

# MODULE:       v.in.e00
# AUTHOR(S):    Markus Neteler, Otto Dassau
# PURPOSE:      Import E00 data into a GRASS vector map
#               Imports single and split E00 files (.e00, .e01, .e02 ...)
# COPYRIGHT:    (c) 2004, 2005 GDF Hannover bR, http://www.gdf-hannover.de
#               This program is free software under the GNU General Public
#               License (>=v2). Read the file COPYING that comes with GRASS
#               for details.
#      -  avcimport: http://avce00.maptools.org

[script follows]

Coding standards

Please have a look at our SUBMITTING for C-programs and SUBMITTING_PYTHON for Python scripts before submitting here.

Documenting your code

You can have an help page template auto-generated by using the GRASS command line parser with the --html-description command line option. Please, see also the g.parser help page.

Miscellaneous Add-ons

  • utm_which_zone.sh is a shell script to determine UTM zone from Lat/Lon input. Requires Octave or Matlab to be installed. A shell-only version is available which only requires awk.
    Authors: Hamish Bowman (Octave part), Markus Neteler (shell script wrapper), Daniel Calvelo (sh+awk version)

  • Perl scripts for converting data forth and back between Excel files and PostgreSQL: pg2xls.pl reads data from PostgreSQL and produces an excel workbook; xls2sql.pl reads excel files and outputs SQL statements to be fed into an RDBMS. Both scripts need modules from CPAN, especially Spreadsheet::ParseExcel for xls2sql.pl and Spreadsheet::WriteExcel::FromDB and its dependencies for pg2sql.pl. Check the source headers for more info.
    Authors: Daniel Calvelo (xls2sql.pl), Markus Neteler (pg2xls.pl)

  • dbf2sql is a Perl script for translating dbf-tables into a sql-command. dbf-tables are read using dbfdump-command from dbd-xbase-perl module (dbd::xbase and getopt::long have to be installed from CPAN first). There are problems, if the last column of the table contains characters. Suggestions for improvements welcome!
    Author:Wolfgang Qual

  • azimuth2.c is a small C program to calculate the azimuth and length of vector lines exported by GRASS-GIS as ASCII files (like this: v.out.ascii input=vector output=ascii format=standard). It is useful for create rose diagrams of lineament maps. Improvements on the original code after suggestions by Örs Téglásy, Hungary.
    Author: Carlos Henrique Grohmann

  • ann.* is the set of GRASS modules (in python) which implements artificial neural network using FANN library. The package requires Fast Artificial Neural Network Library (FANN) v2.x.
    Author: Pawel Netzel

  • csv_dequote.pl is a Perl script to convert comma separated .csv files (including "quoted" text strings containing commas) into a form ready for v.in.ascii. Comma separators are converted to pipes (|), commas in quoted strings are preserved, and "quotes" are removed where it is appropriate to do so. It doesn't need GRASS to run, but it does need the Text::CSV Perl Module (apt-get install libtext-csv-perl).
    Author: Hamish Bowman

GRASS 7.x (current)

GRASS 6.x (previous)

GRASS 5.x (old)

GRASS 4.x (very old)