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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 ...
OpenStreetMap (abbreviated OSM) is a free, open map database updated and maintained by a community of volunteers via open collaboration. [4] Contributors collect data from surveys, trace from aerial photo imagery or satellite imagery, and import from other freely licensed geodata sources.
Centamap – launched in 1999, Centamap is built using data from the Hong Kong Government; GeoInfo Map [1] – a geospatial information service provided by the Hong Kong Special Administrative Region (HKSAR) Government.
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 ...
Currently, the best source for nationwide LiDAR availability from public sources is the United States Interagency Elevation Inventory (USIEI). [1] The USIEI is a collaborative effort of NOAA and the U.S. Geological Survey, with contributions from the Federal Emergency Management Agency, the Natural Resources Conservation Service, the US Army Corps of Engineers, and the National Park Service.
QGIS is a geographic information system (GIS) software that is free and open-source. [2] QGIS supports Windows, macOS, and Linux. [3] It supports viewing, editing, printing, and analysis of geospatial data in a range of data formats. Its name comes from an abbreviation of its previous name, Quantum GIS.
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.