Category Archives: OpenSource

QGIS 2.6 ‘Brighton’ released

In the new release of QGIS 2.6.0 a series of new features have been added concerning

  • General: new features and bugfixes,
  • DXF export (improvements),
  • Map Composer (enhancements),
  • Processing (including a new modeler implementation),
  • QGIS Server (improvements),
  • Symbology (including user interface improvements),
  • User Interface with improvements.

A visual changelog is available for more details with lots of screenshots.

Congratulations to all QGIS developers! Looking forward to see the Fedora RPM available…

You can download QGIS 2.6 at

Video: GRASS GIS development visualization from 1999 to 2013

Watch how the community based GRASS GIS 6.4 software development evolved! You can see how the individual contributors modify and expand the source code:

  • Dec 29, 1999: GRASS GIS 5.0 is being stored in an online source code repository in December 1999…
  • Dec 02, 2000: The developers work on all parts of the code…
  • Jan 15, 2002: Working on the future GRASS GIS 5.1 release
  • Nov 25, 2002: Starting GRASS 5.1 development with code restructuring
  • Jun 14, 2004: GRASS GIS 5.7 released in June 2004
  • Nov 09, 2004: Source code restructuring to get a better directory layout (all other developers waiting…)
  • Nov 09, 2004: … thousands of files are modified in this operation …
  • Nov 10, 2004: All developers resume their activities after the restructuring
  • Jan 10, 2005: Preparing the GRASS GIS 6.0.0 release…
  • Apr 09, 2005: GRASS GIS 6.0.0 published, release branch being split off from trunk for easier maintenance
  • Feb 22, 2006: Release of GRASS GIS 6.0.2 and new source code refactoring startedApr 05, 2006: Heavy development activity in trunk (development branch) …
  • Oct 25, 2006: GRASS GIS 6.2.0 released in October 2006
  • Apr 10, 2007: Preparing the GRASS GIS 6.2.2 release…
  • Jun 16, 2007: GRASS GIS 6.2.2 released in June 2007
  • Nov 01, 2007: Raster and vector modules being actively maintained…
  • Apr 02, 2007: New graphical user interface development speeding up (wxGUI)
  • Feb 20, 2008: Copyright statements prettified in many files
  • May 31, 2008: New GRASS 6 development branch being split off from trunk (which becomes GRASS 7)
  • Jun 10, 2008: Developers moving over to new branch
  • Feb 23, 2009: GRASS 6.4 release branch split off from GRASS 6 development branch
  • Apr 03, 2009: GRASS GIS 6.4 preparations starting…
  • Feb 24, 2010: Intense maintenance in GRASS 6.4 release branch
  • Sep 15, 2010: GRASS GIS 6.4.0 released in September 2010
  • Apr 12, 2011: GRASS GIS 6.4.1 released in April 2011
  • Jun 27, 2011: GRASS GIS 6.4.svn matures for the upcoming 6.4.2 release
  • Aug 16, 2011: Intense maintenance in GRASS 6.4 release branch (GRASS GIS 7 development not shown here)…
  • Feb 19, 2012: GRASS GIS 6.4.2 released in February 2012
  • Nov 13, 2012: Backporting graphical user interface bugfixes from GRASS GIS 7 to GRASS GIS 6.4
  • Apr 17, 2013: Further maintenance in GRASS 6.4 release branch
  • Jul 10, 2013: Fixing odds ‘n ends for the new stable release
  • Jul 27, 2013: GRASS GIS 6.4.3 released in July 2013

The corresponding timeline is also available at


Rendering: Markus Neteler
Audio track editing: Duccio Rocchini & Antonio Galea

Le bruit peut rendre sourd – Track 6/18 Album “Sensation electronique” by Saelynh (CC-BY-NC-ND)

Software used:
Gource software: (GPL)
OpenShot video editor: (GPL

OSGeo-Live 7.0 Released

The OSGeo-Live geospatial software collection version 7.0 has been released, featuring more than sixty open source, standards compliant geospatial desktop applications, web applications and frameworks. A complete installation kit and high-quality sample data in multiple industry standard formats are included. The OSGeo Live will be officially launched at FOSS4G 2013 in Nottingham, UK, 17-21 September, 2013.

Release Highlights

Projects new to this release include:

  • GeoNode — a web-based application and platform for developing geospatial information systems (GIS) and for deploying spatial data infrastructures (SDI)
  • Leaflet — a modern, open source JavaScript library for mobile-friendly interactive maps
  • ncWMS — a Web Map Service (WMS) for geospatial data stored in CF-compliant NetCDF files
  • netCDF dataset — daily maximum temperature and rainfall, worldwide

All geospatial applications on the disc have been updated to their latest stable releases.

About OSGeo-Live

OSGeo-Live is a self-contained bootable DVD, USB flash drive and Virtual Machine based upon Ubuntu Linux (version 12.04 LTS). OSGeo-Live is pre-configured with a wide variety of robust open source geospatial software. All applications can be trialled without installing anything on your computer, simply by booting the computer from a DVD or USB drive, or running in a Virtual Machine environment. Each featured package is accompanied by both a publication quality one page descriptive summary and a short tutorial on how to get started using it.

OSGeo-Live includes:

  • Over sixty quality geospatial Open Source applications installed and pre-configured
  • Free world maps and geodata
  • One page overview and quick start guide for every application
  • Overviews of key OGC standards
  • Translations to multiple languages


Over 160 people have directly helped with OSGeo-Live packaging, documenting and translating, and thousands have been involved in building the packaged software.

Packagers, documenters and translators include:

Activity Workshop, Agustín Dí­ez, Aikaterini Kapsampeli, Alan Beccati, Alan Boudreault, Alessandro Furieri, Alexander Bruy, Alexander Kleshnin, Alexander Muriy, Alexandre Dube, Alexey Ardyakov, Alex Mandel, Amy Gao, Andrea Antonello, Andrea Yanza, Andrey Syrokomskiy, Andry Rustanto, Angelos Tzotsos, Anna Muñoz, Antonio Falciano, Anton Novichikhin, Anton Patrushev, Argyros Argyridis, Ariel Núñez, Assumpció Termens, Astrid Emde, Barry Rowlingson, Benjamin Pross, Brian Hamlin, Bruno Binet, Cameron Shorter, Christophe Tufféry, Christos Iossifidis, Cristhian Pin, Damian Wojsław, Dane Springmeyer, Daniel Kastl, Daria Svidzinska, David Mateos, Denis Rykov, Diego González, Diego Migliavacca, Dimitar Misev, Dmitry Baryshnikov, Dominik Helle, Edgar Soldin, Eike Hinderk Jürrens, Elena Mezzini, Eric Lemoine, Estela Llorente, Etienne Delay, Etienne Dube, Evgeny Nikulin, Fran Boon, François Prunayre, Frank Gasdorf, Frank Warmerdam, Friedjoff Trautwein, Gavin Treadgold, Giuseppe Calamita, Gerald Fenoy, Grigory Rozhentsov, Guy Griffiths, Hamish Bowman, Haruyuki Seki, Henry Addo, Hernan Olivera, Howard Butler, Hyeyeong Choe, Ian Edwards, Ian Turton, Ilya Filippov, Jackie Ng, Jan Drewnak, Jane Lewis, Javier Rodrigo, Javier Sánchez, Jesús Gómez, Jim Klassen, Jing Wang, Jinsongdi Yu, Jody Garnett, Johan Van de Wauw, John Bryant, Jorge Arévalo, Jorge Sanz, José Antonio Canalejo, José Vicente Higón, Judit Mays, Klokan Petr Pridal, Kristof Lange, kuzkok, Lance McKee, Lars Lingner, Luca Delucchi, Lucía Sanjaime, Mage Whopper, Manuel Grizonnet, Marc-André Barbeau, Marco Curreli, Marco Puppin, Marc Torres, Margherita Di Leo, Maria Vakalopoulou, Mario Andino, Mark Leslie, Massimo Di Stefano, Mauricio Miranda, Mauricio Pazos, Maxim Dubinin, Michaël Michaud, Michael Owonibi, Micha Silver, Mike Adair, Milena Nowotarska, M Iqnaul Haq Siregar, Nacho Varela, Nadiia Gorash, Nathaniel V. Kelso, Ned Horning, Nobusuke Iwasaki, Oliver Tonnhofer, Òscar Fonts, Otto Dassau, Pasquale Di Donato, Patric Hafner, Paul Meems, Pavel, Pedro-Juan Ferrer, Pirmin Kalberer, Raf Roset, Ricardo Pinho, Roald de Wit, Roberta Fagandini, Roberto Antolin, Roberto Antolí­n, Roger Veciana, Ruth Schoenbuchner, Samuel Mesa, Scott Penrose, Sergey Grachev, Sergio Baños, Simon Cropper, Simon Pigot, Stefan A. Tzeggai, Stefan Hansen, Stefan Steiniger, Stephan Meissl, Steve Lime, Thierry Badard, Thomas Baschetti, Thomas Gratier, Tom Kralidis, Toshikazu Seto, Trevor Wekel, Valenty González, Vera, Xianfeng Song, Yoichi Kayama, Zhengfan Lin

Sponsoring organisations


4th GRASS GIS Community Sprint: Exciting achievements

The GRASS GIS community is delighted to present the outcome of the 4th Community Sprint that took place in a warm and sunny Prague, Czech Republic, from July 12 to July 18, 2013. The event happened after the Geoinformatics conference at the Czech Technical University in Prague. The Community Sprint was once more a creative gathering of both long-term and new developers, as well as users.
This meeting was held in the light of 30 YEARS OF GRASS GIS!

We wish to cordially thank the Department of Mapping and Cartography, Faculty of Civil Engineering, Czech Technical University in Prague for hosting and technical support. In particular, we gratefully acknowledge our association sponsors OSGeo  and FOSSGIS e.V., and many individual donors: Peter Löwe, Andrea Borruso, Massimo Di Stefano, Alessandro Sarretta, Joshua Campbell, Andreas Neumann, Jon Eiriksson, Luca Casagrande, Karyn O Newcomb, Holger Naumann, Anne Ghisla, Helena Mitasova and Lubos Mitas, Dimitris Tamp, Mark Seibel, Markus Metz, and Tawny Gapinski. These financial contributions were used to cover costs such as meals and to help reducing travelling and accommodation expenses for participants with far arrival who came on own expenses.

Developers and users who joined the event came from various countries like Italy, Czech Republic, Slovak Republic, Poland, Sri Lanka/France, USA and Germany.
The Community Sprint focused on:

  • testing/bugfixing of the upcoming GRASS 7 version,
  • backporting new functionalities to the stable GRASS 6.4 series,
  • testing/bugfixing related to Mac OS X, MS-Windows and Linux,
  • presenting and developing the new Temporal GIS Algebra in GRASS 7,
  • connecting GRASS 7 with the planetary science software ISIS,
  • discussing integration with software, a powerful multidimensional raster processor,
  • creating 3D vector test data for 3D interpolation,
  • discussing vector conflation,
  • discussing Bundle Block Adjustments,
  • presenting the state of image processing in GRASS 7, and discussing its future,
  • improving documentation, with focus on image processing and Temporal GIS Algebra,
  • developing/refactoring and bugfixing several wxGUI’s components,
  • further developing customizable wxGUI Toolboxes concept,
  • improving translation in Polish and Romanian languages,
  • fixing v.krige in GRASS7 and proposing merge with the recently developed v.kriging module,
  • meeting between Google Summer of Code 2013 mentor and students.

A lot of topic oriented discussions happened among small groups of participants: for more detailed information, please visit the Wiki pages at and the related discussion page at

The Geographic Resources Analysis Support System, commonly referred to as GRASS GIS, is an Open Source Geographic Information System providing powerful raster, vector and geospatial processing capabilities in a single integrated software suite. GRASS GIS includes tools for spatial modeling, visualization of raster and vector data, management and analysis of geospatial data, and the processing of satellite and aerial  imagery. It also provides the capability to produce sophisticated presentation graphics and hardcopy maps. GRASS GIS has been translated into about twenty languages and supports a huge array of data formats. It is distributed freely under the terms of the GNU General Public License (GPL). GRASS GIS is an official project of the Open Source Geospatial Foundation (OSGeo).

GRASS GIS Development Team, July 2013

GRASS GIS 6.4.3RC4 released

Fourth (and last) release candidate of GRASS GIS 6.4.3 with improvements and stability fixes
A fourth release candidate of GRASS GIS 6.4.3 is now available.

Source code download:

Binaries download:

To get the GRASS GIS 6.4.3RC4 source code directly from SVN:
 svn checkout

Key improvements of this release include some new functionality (assistance for topologically unclean vector data), fixes in the vector network modules, fixes for the wxPython based portable graphical interface (attribute table management, wxNVIZ, and Cartographic Composer), fixes in the location wizard for Datum transform selection and support for PROJ.4 version 4.8.0, improvements for selecting the Python version to be used, enhanced portability for MS-Windows (native support, fixes in case of missing system DLLs), and more translations (esp. Romanian).

See also our detailed announcement:

First time users should explore the first steps tutorial after installation.

Release candidate management at

Please join us in testing this release candidate for the final release.

Consider to donate pizza or beer for the upcoming GRASS GIS Community Sprint in Prague:
Thanks to all contributors!

Scaling up globally: 30 years of FOSS4G development

Scaling up globally: 30 years of FOSS4G development. Keynote at FOSS4G-CEE 2013, Romania

In my presentation I briefly review 3 decades of Open Source GIS development, from the ’80th to the present.

GRASS GIS Community Sprint 2012 – 23-28 May 2012, Prague, Czech Republic

The next “GRASS GIS Community Sprint” will take place from May 23 to May 28, 2012 in Prague, Czech Republic directly following the Geoinformatics FCE CTU 2012 conference.

This GRASS Community Sprint is a great occasion for you to support the development by actively contributing to the source code, manuals or likewise. It is a get together for GRASS project members and supporters to make decisions and tackle larger problems. For this meeting, we welcome people committed to improving the GRASS GIS project. This includes developers, documenters, bug reporters, translators and others.

Timing and Duration:

May 23, 2012 (day of arrival) – May 28, 2012 (day of departure)


Department of Mapping and Cartography Faculty of Civil Engineering, Czech Technical University in Prague

For more detailed information, please visit

GRASS GIS 6.4.2 released

GRASS GIS 6.4.2 released
19 February 2012

We are pleased to announce the release of a new stable version of GRASS GIS. This release fixes bugs discovered in version 6.4.1 of the program and adds a number of new features. This release includes over 760 updates to the source code since 6.4.1. As a stable release series, the 6.4 line will enjoy long-term support and incremental enhancements while preserving backwards-compatibility with the entire GRASS 6 line.

The new wxPython graphical user interface (wxGUI) has been updated with many new features and tools. Python is now a fully supported scripting language, including an updated Python toolkit to simplify the authoring of personal scripts, support for NumPy based array calculations, and a Python application interface for the GRASS C libraries. Additionally, MS-Windows support continues to mature.  GRASS 6.4.2 debuts ten new modules, a new GUI cartographic composer tool, a new GUI object-oriented modeling environment, and improved infrastructure for installing community supplied add-on modules.

Read the full story at


The Geographic Resources Analysis Support System, commonly referred to as GRASS, is an Open Source Geographic Information System (GIS) and geospatial analysis toolkit. For nearly three decades, GRASS has provided powerful raster, vector, and geospatial processing engines in a single integrated software suite. GRASS includes tools for spatial modeling of raster and vector data, visualization, the management and analysis of geospatial information, and the processing of satellite and aerial imagery. It also provides the capability to produce sophisticated presentation graphics and publication-quality hardcopy maps. GRASS has now been translated into twenty languages and supports an extensive array of data formats. It is distributed under the terms of the GNU General Public License (GPL).

GRASS differs from many other GIS software packages used in the academic and professional worlds in that it is developed and distributed by users for users, mostly on a volunteer basis. Its code and spatial processing algorithms are open and transparent, and the software is distributed free of charge. The source code is also freely available, allowing for immediate customization, examination of the underlying algorithms, the addition of new features, and faster identification and patching of bugs.

GRASS GIS 6.4.0 released

The GRASS Development Team announces

1. GRASS GIS 6.4.0 released 3 September 2010

We are pleased to announce the release of GRASS GIS 6.4.0, the first in the new line of 6.4 stable releases. As a stable release 6.4 will enjoy long-term support. The next release (6.4.1) will introduce a few new features which are still undergoing final testing, but after that all further 6.4 releases will be bugfix-only. Due to our highly conservative stabilization policy this is the first official version of GRASS to introduce new features since October 2006 and supersedes the previous stable line of GRASS 6.2. As such the floodgates are open and there are many new features to explore and many new structural improvements to be found in the software. GRASS 6.4 brings a number of exciting enhancements to the GIS. Our new wxPython graphical user interface (wxGUI) is debuted, Python is now a fully supported scripting language, and for the first time since its inception with a port from the VAX 11/780 in 1983, GRASS will now run natively on a non-UNIX based platform: MS-Windows! In addition to bringing the software to a host of new users, the ability to run GRASS on any common computer platform furthers our goal of open access to the software. We hope you will enjoy the ability to use this program on the systems that are most convenient to you and your work.
Due to the freshness of WinGrass there may still be a few rough edges yet to discover, but after more than a year of dedicated testing and quality-assurance review we are very pleased with the results. Users can be confident to use this version for their day to day work, indeed due to the open development model many already do. Existing UNIX and Mac users will be happy to know that these new features do not disrupt the base GIS which remains as solid as ever and fully backwards compatible with earlier GRASS 6.0 and 6.2 releases. The venerable Tcl/Tk GUIs are also still available if you prefer to use them.
The GRASS software including over 400 built-in analysis modules and 100 community supplied add-on modules and toolboxes can be downloaded for free from the main GRASS website at, or from many local mirrors worldwide. In addition to the extensive documentation which comes with the software, our Wiki help system contains a wealth of user supplied tips and tricks, tutorials, and guides.
Since 6.4 entered the testing phase work has begun on GRASS 7 and is progressing rapidly, including many new wxGUI improvements and tools which we hope to bring over for the upcoming 6.4.1 release.

Section 1. About GRASS GIS

The Geographic Resources Analysis Support System, commonly referred to as GRASS, is a Geographic Information System (GIS) providing powerful raster, vector, and geospatial processing engines in a single integrated software suite. GRASS includes tools for spatial modeling, visualization of raster and vector data, management and analysis of geospatial data, and the processing of satellite and aerial imagery. It also provides the capability to produce sophisticated presentation graphics and hardcopy maps. GRASS has now been translated into twenty languages and supports a huge array of data formats. GRASS is a founding member of The Open Source Geospatial Foundation (OSGeo), a non-profit legal entity which has enjoyed extraordinary growth. We expect that this formal infrastructure will guarantee that the GRASS community will be well supported and vibrant far into the future.
GRASS is currently used around the world in academic and commercial settings as well as by many governmental agencies and environmental consulting companies. It runs on a variety of popular hardware platforms and is Free open-source software released under the terms of the GNU General Public License.
Users are encouraged to study, customize, extend, improve, and (if necessary) diagnose and repair the inner workings of any part of the program. We believe that scientific progress depends on the reproducibility of results, which in turn depends on the unhindered ability of the user to know, evaluate, double-check, and learn from all algorithms and methodologies used in the process of their work.

Section 2. Screenshots

Section 3. Platforms supported by GRASS

GNU/Linux, Mac OS X/Darwin, Microsoft Windows (native using MinGW or with full UNIX support via Cygwin), Sun Solaris (SPARC/Intel), Silicon Graphics Irix, HP-UX, DEC-Alpha, AIX, the BSD family, iPAQ/Linux and other UNIX compliant platforms. GRASS runs on both 32 and 64 bit systems with large data file (>2GB) support for most key modules.

Section 4. Software download/CDROM

The new source code is available now and binary packages for major operating systems will be published shortly.
For details on GRASS software capabilities please refer to:, and the Wiki collaborative help system.

Section 5. What’s new in GRASS 6.4.0

(selected improvements from the nearly 9,000 updates to the source code)

  • Source code quality/libraries:
    • Many internal adjustments needed for native MS-Windows support, for example safely handling spaces in file names.
    • Programmer’s Manual: continued Doxygen integration and automated generation into PDF and HTML formats. Publicly available for download and perusal.
    • Improved policies for code submission specified in the SUBMITTING files for documentation, Python, Tcl/Tk, and shell scripts
    • New Python scripting language library containing many helper functions
    • All modules: --quiet and --verbose message modes
    • All modules: --script flag generates boilerplate for shell scripts with parser and GUI support
    • Batch mode for launching GRASS for non-interactive processing tasks
    • DBMI: SQL parser extended (support for DROP COLUMN, ASC/DESC keyword in ORDER BY clause, etc.)
    • Partial differential equations library with OpenMP multi-processor support
    • Major clean-up of the display architecture (libraries and drivers): the drivers no longer maintain a palette; all colors are now specified directly as R/G/B values
    • The “default” datum transformation parameters are now first in the list instead of last
    • Ability to create new locations using EPSG codes with the g.proj module
    • Message translation (i18N): many new translated messages, new languages including Vietnamese and Arabic
    • Documentation/man pages: various fixes and improvements (more examples added, including graphics, improved style, new introductory pages)
    • Documentation: various terminology issues fixed and terms unified
    • Symbols: A number of new icons, support for symbol rotation
  • Graphical User Interface (GUI):
    • g.gui: New frontend command to launch GUI sessions
    • wxPython GUI:
    • gis.m Tcl/Tk GUI:
      • GIS manager extended with mouse placement of text and scale bars and menu updates
      • Updated Tcl/Tk profile and georectification GUI tools
      • New interactive command console with output window
      • New interfaces for interactive raster reclassification, raster recoding, custom raster color rules, and vector reclassification
      • New animation tool to display raster map series as an animation
    • Improved startup screen and interface, including searchable EPSG codes list and better custom datum support
    • NVIZ: Major revamp of interface; output directly to MPEG or other FFmpeg supported formats
    • QGIS integration: GRASS toolbox extended, available from Quantum GIS
  • Drivers:
    • DBF driver: extended column type support
    • HTMLMAP display driver: NEW – Prepares clickable HTML image map templates (port from GRASS 5)
    • PostScript display driver: NEW – Renders display directly into a PostScript or Encapsulated PostScript file
    • Cairo display driver: NEW – Renders display directly into a number of image formats using the Cairo rendering engine
  • New and major updates for modules and scripts since GRASS 6.2.3:
    • db.dropcol: NEW – Drops a column from selected attribute table
    • db.droptable: NEW – Drops an attribute table
    • NEW – Imports attribute tables in various formats
    • db.login: Support for interactive password entry (invisible passwords)
    • db.out.ogr: NEW – Exports attribute tables into various formats
    • d.barscale: North arrow for lat/lon locations
    • d.out.file: Expanded to use the Cairo and PostScript display drivers to allow export to ps, eps, svg, and pdf formats
    • d.path: Support for use from GUI and non-interactive mode
    • d.rast.edit: Rewritten in Tcl/Tk
    • d.shadedmap: NEW – Drapes a semi-transparent raster over a shaded relief map
    • d.text, d.font: Updated to accept TrueType fonts and maintain a database of system fonts
    • g.dirseps: NEW – Internal utility for converting directory characters (MS-Windows)
    • g.extension: NEW – Utility for downloading and installing Add-on modules
    • g.findetc: NEW – Internal utility for locating support files
    • g.gui: NEW – Launches a GRASS graphical user interface (GUI) session
    • g.message: NEW – Internal utility for printing quiet and verbose messages in scripts
    • g.mkfontcap: NEW – Internal utility for generating a list of available system fonts
    • g.mremove: Support for use from GUI
    • i.atcorr: NEW – Performs atmospheric correction using the 6S algorithm
    • i.landsat.rgb: Vast speed improvement
    • Various improvements including new map border control, rotated and scaled symbols, and allowing geogrid from lat/lon locations
    • r3.gwflow: NEW – Models transient, confined groundwater flow in three dimensions
    • r3.stats: NEW – Generates volume statistics for raster3d maps
    • r3.univar: NEW – Calculates univariate statistics from the cells of a 3D raster map
    • r.bilinear: This module has been replaced by r.resamp.interp
    • r.category: NEW – Manages raster map category values and labels (replaces r.cats)
    • r.colors: Support for equalized histogram, reversed, logarithmically scaled, rules-from-file, and more
    • r.gwflow: NEW – Models transient, confined groundwater flow in two dimensions
    • Various fixes and more robust when dealing with flaky WMS servers
    • Support for extended statistics
    • r.le suite: Various fixes and modernization
    • suite: NEW – Advanced toolset for multiscale analysis of landscape structure.
      Including single and multi-processor enabled modules:,,,,,,,,,,,,,, and
    • r.mfilter.fp: NEW – Raster map custom matrix filter (floating point version)
    • r.out.gdal: New C implementation replaces shell script version, region sensitive with color export ability
    • NEW – Exports a raster map to a text file as x,y,z values based on cell centers
    • r.profile: Report data outside the current region as invalid
    • r.proj: Replaced with an improved version
    • r.resamp.interp: NEW – Resamples raster map layers to a finer grid using interpolation
    • r.resamp.stats: NEW – Resamples raster map layers to a coarser grid using aggregation
    • Enhanced control of meta-data
    • NEW – Support module which updates raster map statistics
    • r.univar: Support for extended statistics
    • r.watershed: Vast speed improvement
    • r.what.color: NEW – Queries colors for a raster map layer
    • v.db.dropcol: NEW – Drops a column from the attribute table connected to a given vector map
    • v.db.join: NEW – Allows to join a table to a vector map table
    • v.db.renamecol: NEW – Renames a column in the attribute table connected to a given vector map
    • v.db.univar: NEW – Calculates univariate statistics on selected table column for a vector map
    • v.digit (Tcl/Tk): Rewritten for use without X11
    • v.digit (wxPython): NEW – All new vector map digitizer rewritten in wxPython
    • v.edit: NEW – Edits a vector map, allows adding, deleting and modifying selected vector features
    • v.generalize: NEW – Generalization of vector features using a number of smoothing techniques
    • More efficient implementation of the where= option
    • NEW – Import GetFeatures from WFS format
    • NEW – Visibility graph construction
    • v.out.svg: NEW – Exports a vector map to SVG format
    • v.proj: Better handling of z coordinates in 3-D vectors
    • NEW – Updates vector map metadata
    •,, and Work with massive datasets imported without topology (e.g. LIDAR)
    • NEW – Performs transformation of 2D vector features to 3D

A more detailed description of changes can be found in the previous announcements of the GRASS 6.3 development preview release and the GRASS 6.4.0 release candidate series.
For a comprehensive list of changes see the 6.4 ChangeLog file.
For a complete list of commands available in GRASS 6.4.0 see the online manuals and the GRASS 6.4 module list.

We are always looking for testers, code developers, and technical writers to help us maintain and accelerate the development cycle. The GRASS GIS project is developed under the terms of the GNU General Public License (the GPL) in the open by volunteers the world over. GRASS differs from many other GIS software packages used in the professional world in that it is developed and distributed by users for users, mostly on a volunteer basis, in the open, and is given away for free. Emphasis is placed on interoperability and unlimited access to data as well as on software flexibility and evolution rate.
Release history:

Short version

GRASS Development Team