GRASS migration hints

Migrating to GRASS

Welcome! There is a lot of help on the web and a wealth of expertise available on the mailing lists and via IRC.

Tips for recent migrants

• Tips for ArcGIS users
• Watershed Analysis with GRASS (when you know ESRI)
• Whatever-GIS-Software to GRASS command translation table and discussion
• GRASS 4 and 5 users: GRASS Module Porting List (check here if you don't find a certain command in GRASS 6)
• GRASS 7 users: List of new features in GRASS 7 (new names, options, etc.; check here if you don't find a certain command or module parameter)

GIS "The GRASS way"

Interoperability

Collaboration with external software is highly encouraged.

• GDAL/OGR for Import/Export
• R statistics: GRASS/R interface
• DXF: v.in.dxf, v.out.dxf
• 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
• V5D: r3.in.v5d, r3.out.v5d

Portability

• All code POSIX C and generic UNIX compatible
• Most code MinGW compatible for native MS-Windows

Scriptability

• GRASS GIS is made up of modular tools specifically designed for easy scriptability in any number of common scripting languages, see GRASS and Shell

• Interface for direct hooks into higher scripting languages (esp. Python), see GRASS and Python and

• if "GRASS_BATCH_JOB=/path/to/script.sh" is set GRASS 6+ will run the script as a batch job and exit when it is complete. Start GRASS with the full path to the mapset to avoid the startup menus. See also GRASS and Shell.

Freedom

• How the Open Source software development model works
• Rocchini, D., Neteler, M., 2012. Let the four freedoms paradigm apply to ecology. Trends in Ecology & Evolution 27, 310–311., http://tinyurl.com/tree-four-freedoms (full text)

GRASS GIS Concepts

• GIS concepts

Software Comparisons & Thesis

• 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 OSGeo and COTS software functionality (2010)
• Feature Comparison of Open Source Desktop GIS Software (several tables, 2007)
• 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)
• See also links in http://gis.stackexchange.com/questions/23637/comparison-of-open-source-desktop-gis-packages

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