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This is a list of GIS data sources (including some geoportals) that provide information sets that can be used in geographic information systems (GIS) and spatial databases for purposes of geospatial analysis and cartographic mapping. This list categorizes the sources of interest.
Files: compressed file variable, uncompressed file variable, one country or whole world, 1 tiles. —♣ Comment(s): License: The GIS files are not always under free license. However, the project manager wrote to Yug « you can make a private use of all these data. Derivative files of lower quality such as bitmap, or modest quality / simplified ...
GDAL/OGR – Library between GIS application and sources; for reading and writing raster geospatial data formats (GDAL) and simple features vector data (OGR). GeoTools – Open source GIS toolkit (Java); to enable the creation of interactive geographic visualization clients. GEOS – A C++ port of the Java Topology Suite (JTS), a geometry model ...
Some companies freely license satellite/aerial/street imagery sources from which OpenStreetMap contributors trace roads and features, while other companies make data available for importing map data. Automotive Navigation Data (AND) provided a complete road data set for Netherlands and trunk roads data for China and India.
List of GIS data sources; List of spatial analysis software; Local Land and Property Gazetteer; Location-allocation; M. Map algebra; Map regression; MapDotNet; Mapnik;
Geoportals are important for effective use of geographic information systems (GIS) and a key element of a spatial data infrastructure (SDI). Geographic information providers, including government agencies and commercial sources, use geoportals to publish descriptions ( geospatial metadata ) of their geographic information.
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U.S. National Geospatial-Intelligence Agency (NGA) maintains a comprehensive database of non-U.S. place data. The Libre Map Project: The purpose of the project is to aggregate and make digital maps and related GIS data available for free. Licensing: CC-BY-SA 2.0 GPSies.com: Google Maps tool