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  2. 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 ...

  3. Colorado Springs Airport - Wikipedia

    en.wikipedia.org/wiki/Colorado_Springs_Airport

    The airport is located on the east side of Colorado Springs, accessible by Milton E. Proby Parkway via Powers Boulevard/SH 21.Milton E. Proby Parkway loops through the airport running north to the terminal, with exits to long and short term parking and rental car return, and eventually splits into an upper departures drop-off area and lower arrivals pick-up area east of the terminal.

  4. Quadrangle (geography) - Wikipedia

    en.wikipedia.org/wiki/Quadrangle_(geography)

    The shorthand "quad" is also used, especially with the name of the map; for example, "the Ranger Creek, Texas quad". A quadrangle is defined by north and south boundaries of constant latitude (which are not great circles so are curved), and by east and west boundaries of constant longitude. From approximately 1947–1992, the USGS produced the ...

  5. United States Geological Survey - Wikipedia

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

    USGS topographic quadrangle maps are marked with grid lines and tics around the map collar which make it possible to identify locations on the map by several methods, including the graticule measurements of longitude and latitude, the township and section method within the Public Land Survey System, and cartesian coordinates in both the State ...

  6. United States Geological Survey Library - Wikipedia

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

    The USGS headquarters in Reston, VA. Today, the United States Geological Survey Library's users have access to over 1.7 million items: over 980,000 books and journals, over 600,000 maps, over 8,000 electronic media items (DVDs, CDs), and subscribes to over 113,000 electronic journal titles and eBooks.

  7. United States National Grid - Wikipedia

    en.wikipedia.org/wiki/United_States_National_Grid

    In addition to providing a convenient means to identify and communicate specific locations (points and areas), an overlaid USNG grid also provides an orientation, and—because it is distance based—a scale of distance that is present across the map. USGS topographic maps have for decades been published with 1000-meter UTM tick marks in the ...