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  2. National Geographic Maps - Wikipedia

    en.wikipedia.org/wiki/National_Geographic_Maps

    National Geographic Maps, founded in 1915, is the commercial map publishing division of National Geographic, part of a joint venture between The Walt Disney Company ...

  3. The National Map - Wikipedia

    en.wikipedia.org/wiki/The_National_Map

    The National Map is part of the USGS National Geospatial Program. [3] The geographic information available includes orthoimagery (aerial photographs), elevation, geographic names, hydrography, boundaries, transportation, structures and land cover. The National Map is accessible via the Web, as products and services, and as downloadable data ...

  4. Robinson projection - Wikipedia

    en.wikipedia.org/wiki/Robinson_projection

    The National Geographic Society (NGS) began using the Robinson projection for general-purpose world maps in 1988, replacing the Van der Grinten projection. [2] In 1998, NGS abandoned the Robinson projection for that use in favor of the Winkel tripel projection , as the latter "reduces the distortion of land masses as they near the poles".

  5. List of GIS data sources - Wikipedia

    en.wikipedia.org/wiki/List_of_GIS_data_sources

    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)

  6. United States National Grid - Wikipedia

    en.wikipedia.org/wiki/United_States_National_Grid

    The National Map Viewer Archived 2012-03-29 at the Wayback Machine (USGS; set coordinate display to USNG) NOAA/NWS Enhanced Data Display (EDD) (with USNG coordinate display enabled) Utility to convert latitude and longitude to USNG (NOAA/NGS) Programmer resource: JavaScript utility for converting between lat/long and MGRS/USNG

  7. List of national mapping agencies - Wikipedia

    en.wikipedia.org/wiki/List_of_national_mapping...

    Qatari Center for Geographic Information Systems (QCGIS) gisqatar.org.qa Archived 2016-07-01 at the Wayback Machine: Republic of Korea: National Geographic Information Institute: ngii.go.kr: Romania: Agentia Nationala de Cadastru si Publicitate Imobiliara: ancpi.ro: including 1:50k topographic map Russia