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  2. United States Geological Survey - Wikipedia

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

    In 2015, the USGS unveiled the topoView website, a new way to view their entire digitized collection of over 178,000 maps from 1884 to 2006. 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.

  3. U.S. Geological Survey National Center - Wikipedia

    en.wikipedia.org/wiki/U.S._Geological_Survey...

    U.S. Geological Survey National Center visitor entrance in 2011 The approximately 1,000,000 sq. ft., 1,200 foot long U.S. Geological Survey National Center building sits on a 105-acre site and is divided into three main sections—the agency administration offices, the laboratories, and the map reproduction area.

  4. The National Map - Wikipedia

    en.wikipedia.org/wiki/The_National_Map

    The USGS also utilizes data from The National Map Corps, which consists of volunteers who devote some of their time to provide cartographic information on structures. [ 4 ] The National Map is the official replacement for the USGS topographic map program .

  5. List of GIS data sources - Wikipedia

    en.wikipedia.org/wiki/List_of_GIS_data_sources

    USGS Land Cover Institute: Set of links from the USGS for numerous land cover datasets. Although primarily US data, further down the list there is data for other continents. Atlas of the Biosphere: Mapping the Biosphere: Raster maps of environmental variables including soil pH, potential evapotranspiration, average snow depth, and more. Global 200

  6. Parshall flume - Wikipedia

    en.wikipedia.org/wiki/Parshall_flume

    This modification - supplied by the USGS Hydrologic Instrumentation Facility - is available in two sizes: the original 3" and the recently added 6". [28] Kilpatrick notes that the discharge for this modification of the Parshall flume is slightly greater than for a standard Parshall flume of the same size. [29]

  7. Geographic Names Information System - Wikipedia

    en.wikipedia.org/wiki/Geographic_Names...

    The logo of the United States Geological Survey (USGS) The Geographic Names Information System (GNIS) is a database of name and location information about more than two million physical and cultural features throughout the United States and its territories; as well as the associated states of the Marshall Islands, Federated States of Micronesia, and Palau; and Antarctica.

  8. 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.

  9. Locator map - Wikipedia

    en.wikipedia.org/wiki/Locator_map

    A good understanding of the audience's mental map for a particular area is critical for a proper application of location maps. Used on their own, location maps do not differ significantly from traditional maps, differing primarily in the fact that solitary locator maps focus the attention on a single location within the map frame, where ...