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56,000 maps in digital raster graphic form were acquired on DVDs for $1600 to make the data available. [3] Additional data made available through the project includes SVG boundary files for every US state, Topologically Integrated Geographic Encoding and Referencing (Tiger)/Line 2003 vector map data, and the USGS GeoNames database. [4]
The TIGER files do not contain the census demographic data, but merely the geospatial/map data. GIS can be used to merge census demographics or other data sources with the TIGER files to create maps and conduct analysis. TIGER data is available without cost because U.S. Government publications are required to be released into the public domain.
US Census Bureau US basemaps and US demographic data: U.S. Gazetteer, TIGER/Line shapefiles, census data. National Historical Geographic Information System: NHGIS provides free of charge, aggregate census data and GIS-compatible boundary files for the United States between 1790 and 2012. Atlas of Historical County Boundaries Project (AHCBP)
This is a list of free and open-source software for geological data handling and interpretation. The list is split into broad categories, depending on the intended use of the software and its scope of functionality. Notice that 'free and open-source' requires that the source code is available and users are given a free software license.
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Forest guards in tiger reserves are equipped with personal digital assistants and GPS devices to capture data relating to tiger sightings, deaths, wild life crime and ecological observations while patrolling. [3] The software system maps the patrol routes of forest guards, and the resulting data are then analyzed in a geographic information system.
Leaflet supports Web Map Service (WMS) layers, GeoJSON layers, Vector layers and Tile layers natively. Many other types of layers are supported via plugins.. Like other web map libraries, the basic display model implemented by Leaflet is one basemap, plus zero or more translucent overlays, with zero or more vector objects displayed on top.
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