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2. GeoPDF - Wikipedia

   en.wikipedia.org/wiki/GeoPDF

   GeoPDF is a line of map and imagery products created by TerraGo software applications. GeoPDF products use geospatial PDF as a container for maps, imagery, and other data used to deliver an enhanced user experience in TerraGo applications. However, GeoPDF products conform to published specifications including both the OGC best practice for PDF ...

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. List of GIS data sources - Wikipedia

   en.wikipedia.org/wiki/List_of_GIS_data_sources

   Online collection of all digital USGS 1:24K scale topographic maps (as well as various other GIS data) covering the United States, available as a free download. NPScape United States Department of the Interior National Park Service NPScape is a landscape dynamics monitoring project that provides landscape-level data, tools, and evaluations for ...

5. United States Geological Survey - Wikipedia

   en.wikipedia.org/wiki/United_States_Geological...

   The site is an interactive map of the United States that allows users to search or move around the map to find the USGS collection of maps for a specific area. Users may then view the maps in great detail and download them if desired. [32]

6. List of free geology software - Wikipedia

   en.wikipedia.org/wiki/List_of_free_geology_software

   Free to use software to digitize geological cross-sections, and display and edit borehole logs Geoscience ANALYST [30] Free 3D visualization and communication software for integrated, multi-disciplinary geoscience and mining data and models, which also connects to Python through geoh5py, its open-source API Mira Geoscience Ltd. Free / Proprietary

7. Wikipedia : WikiProject Maps/Source materials

   en.wikipedia.org/wiki/Wikipedia:WikiProject_Maps/...

   USGS Maps. Every USGS topographic map available for free download from the Internet Archive. OpenStreetMap - CC-BY-SA 2.0 vector map data collected by GPS; The Map Library - Maps for Central America and Africa. Tag with commons:Template:PD-MapLibrary (talk, backlinks, edit) GinkgoMaps - Free Digital Maps published under the CC-by Licence

8. Libre Map Project - Wikipedia

   en.wikipedia.org/wiki/Libre_Map_Project

   The Libre Map Project was started by Jared Benedict and around 100 additional individuals contributing money to purchase (or "liberate") a full set of 1:24K scale USGS topographic maps in Digital raster graphic form. [1] The map files were then hosted by archive.org to ensure the map data will continue to be freely available to everyone ...

9. United States Geological Survey Library - Wikipedia

   en.wikipedia.org/wiki/United_States_Geological...

   The U.S. Antarctic Resource Collection (USARC) is currently located at the USGS Library in Reston, VA, and contains materials from the former U.S. Antarctic Resource Center. When operational, the Center was a joint effort of the USGS National Mapping Division and the National Science Foundation United States Antarctic Program.