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  1. May 22, 2024 · Web Tools. The Geographic Names Information System (GNIS) Domestic Names Search Application. Search Domestic Names. Listed here are commonly-accessed web applications associated with geographic names and The National Map. May 22, 2024. topoBuilder - Custom Topographic Maps On Demand.

  2. May 21, 2024 · 7.5 Minute Topo Maps. The United States Geological Survey began mapping the country in 1879 and has been the primary civilian mapping agency of the United States ever since. The best known USGS maps are the 1:24,000-scale topographic maps, also known as 7.5-minute quadrangles.

  3. May 23, 2024 · Introduction. USGS Topographic Map Symbols. Interpreting the colored lines, areas, and other symbols is the fi rst. step in using topographic maps. How to read a USGS Topo map.

    • Heather Ross
    • 2015
  4. May 6, 2024 · Topographic maps of Texas are located in the map cases in the Southeast corner of the library. Topographic maps are shelved alphabetically by series or quadrangle name. The Perry-Castañeda Library Map Collection houses topographic maps of the United States (including Texas) and foreign countries.

  5. 5 days ago · DIGITAL RASTER GRAPHIC (DRG) are images of a U.S. Geological Survey (USGS) standard series topographic map georeferenced to the Universal Transverse Mercator projection. DIGITAL ORTHOPHOTOS QUADRANGLE (DOQ) is a geometrically-corrected orthophoto photograph at a scale of 1:40,000. Let’s take a closer look at these USGS formats in a bit more detail.

  6. May 23, 2024 · USGS is a primary source of geographic information system (GIS) data. Our data and information is presented in spatial and geographic formats, including The National Map, Earth Explorer, GloVIS, LandsatLook, and much more. Explore GIS Data Maps.

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  8. May 21, 2024 · Simple explanation from the U.S. Geological Survey of what geologic maps are and how to use them.

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