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Over the last few years the world of free and open source geospatial software has experienced
some major changes. For instance, the website FreeGIS.org currently lists 330 GIS related
projects. Besides the advent of new software projects and the growth of established projects, a
new organisation known as the OSGeo Foundation has been established to offer a point of
contact. This paper will give an overview on existing free and open source desktop GIS
projects. To further the understanding of the open source software development we give a
brief explanation of associated terms and introduce the two most established software license
types: the General Public License (GPL) and the Lesser General Public License (LGPL).
After laying out the organisational structures, we describe the different desktop GIS software
projects in terms of their main characteristics. Two main tables summarise information on the
projects and functionality of the currently available software......

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Approximate Word Count: 10322
Approximate Pages: 42 (250 words per double-spaced page)

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