Quantum GIS – free and open source geographical information system
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Free and open source software, due to liberal licensing and source code accessibility, seems to be perfect environment for science and research. Development of software with such license is supported by the biggest commercial companies, but also by local self-governments of countries like Switzerland, Italy or Spain. QGIS program can read and write most popular raster and vector formats, and works as web services client. Program was also integrated with i.a. GRASS GIS system and statistical environment R. QGIS is simple, yet powerful tool, which can be useful in hydrology and water management.
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