GRASS migration hints
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There is a lot of help on the web, this wiki and in the user manual. However, a lot of people are available on the mailing lists and at other places.
- See the official support page which also includes links to commercially provided support.
- Subscribe to the grass-users maillist
- Visit the GRASS tag on gis.stackexchange.com
Guides and tips for migration
- GIS Concepts in GRASS GIS
Migrating from ESRI products
- GRASS GIS for ArcGIS users
- Tips for ArcGIS users
- Watershed Analysis with GRASS (in case you know the ESRI way)
- Terminology comparison between ArcGIS and GRASS GIS
Migrating from older versions of GRASS GIS
- Module updates between GRASS GIS version 5 and 6
- List of new features in GRASS GIS 7 (new modules, new names, options, etc.; check here if you don't find a certain modules or module parameter)
GIS "The GRASS way"
When migrating to GRASS GIS, it is useful to review its design and values. Here are the highlights.
- Support for all major platforms including Linux, Mac OS X and MS Windows
- All code POSIX C and generic UNIX compatible
- GRASS GIS works not only on powerful desktops but also on low-end laptops all the way down to devices such as Raspberry Pi.
- GRASS GIS also works on servers, clusters for scientific computing, and on other supper computer or cloud setups
- 64bit and 32bit versions
- GRASS GIS Performance
- 64bit version offers even better performance and capacity on all platforms including MS Windows
All in one
- With GRASS GIS you are getting full selection of analysis including but not limited to hydrology, terrain analysis, network analysis and image processing. No installing or purchasing of additional tools or plugins.
- GRASS GIS aims to process all kinds of geospatial data in a unified way including vectors, rasters, images, 3D rasters and their time series.
- GRASS GIS is made up of modular tools specifically designed for easy scriptability in any number of common scripting languages, see for example GRASS and Shell
- Interface for direct hooks into higher scripting languages especially Python but also R and Bash/Shell, see GRASS and Python and
- GRASS GIS can run without any GUI when the full path to the mapset is provided in the command line parameters. If "GRASS_BATCH_JOB=/path/to/script.sh" environmental variable is set GRASS 6+ will run the script as a batch job and exit when it is complete. Same applies to --exec parameter in GRASS 7.1+. See also grass7 command manual and GRASS and Shell.
Collaboration with external software is highly encouraged.
- GDAL/OGR for import/export to many formats
- NumPy (in Python): script.array.array(), script.array.array3d()
- R statistical software: GRASS-R interface
- DXF: v.in.dxf, v.out.dxf, v.in.ogr, v.out.ogr
- Matlab/Octave: r.in.mat, r.out.mat, v.in.mapgen, v.in.ascii, v.out.ascii
- POV-Ray rendering: r.out.pov, v.out.pov - see also POV-Ray
- VMRL: r.out.vrml (3D virtual reality)
- GMT - Generic Mapping Tools for cartography: r.in.bin, r.out.bin
- Google Earth/KML: v.out.ogr
- VTK (Paraview, etc): r3.out.vtk, r.out.vtk, v.out.vtk - see also GRASS and Paraview
- Vis5D: r3.in.v5d, r3.out.v5d
- QGIS has GRASS Plugin to work with GRASS GIS data and analytical tools inside QGIS
- All users are free to run the GRASS GIS for any purpose, study how it works, copy it and redistribute it, and even change it.
- Freedoms ensured by GNU General Public License (GPL)
- Rocchini, D., Neteler, M., 2012. Let the four freedoms paradigm apply to ecology. Trends in Ecology & Evolution 27, 310–311., (full text)
External links: Software Comparisons
Some information may be outdated. Note the year of individual resources.
- Steiniger, S., Hunter, A.J.S., 2013. The 2012 free and open source GIS software map – A guide to facilitate research, development, and adoption. Computers, Environment and Urban Systems 39, 136–150. DOI
- Matrix of open source and proprietary software functionality (2010)
- MSc thesis 2006 (English), Comparison of geographic information system software (ArcGIS 9.0 and GRASS 6.0): implementation and case study by T.R. Buchanan
- An Exploration Of Free And Open Source Software For Geomatics (thesis, 2008)
- Comparison of Open Source Desktop GIS Packages (collection of links) at GIS StackExchange