.QGIS (previously known as "Quantum GIS") is a cross-platform free and open source desktop geographic information system (GIS) application that provides data viewing, editing, and analysis capabilities.
Similar to other software GIS systems QGIS allows users to create maps with many layers using different map projections. Maps can be assembled in different formats and for different uses. QGIS allows maps to be composed of raster or vector layers. Typical for this kind of software the vector data is stored as either point, line, or polygon-feature. Different kinds of raster images are supported and the software can perform georeferencing of images.
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