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Map containing historical census data from 1900 - 2000 throughout the western United States at the county level. Data includes total population, population density, and percent population change by decade for each county. Population data was obtained from the US Census Bureau and joined to 1:2,000,000 scale National Atlas counties shapefile.
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U.S. States (Generalized) represents the fifty states and the District of Columbia of the United States.
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The U.S. Geological Survey (USGS) and Air Force Civil Engineering Center (AFCEC) have entered into a cooperative agreement to refine the hydrogeology in the Northeast AFRL and Arroyos groundwater areas of the Air Force Research Laboratory of Edwards Air Force Base. As part of these efforts, two electrical resistivity tomography (ERT) surveys- AFRL9 and AFRL10- were collected in the vicinity of the Mound Fault identified by Cyr and Miller (2023) to better determine the position of these faults. Electrical resistivity tomography is a direct current geophysical method that is used to estimate the subsurface distribution of the electrical resistivity (measured in ohm-meters; ohm-m) of a material, and is based on the...
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U.S. States (Generalized: represents the 6 states in the FWS/MSU sahe-grouse and energy development study area.
All secondary roads in the western United States from the 2000 US Census TIGER/line files. Secondary roads are defined as all roadways not classified as an interstate, state highway, or federal highway.


    map background search result map search result map 2008 Climate Science Center Regions shapefile 2008 Climate Science Center Regions shapefile Web Mercator States_Detailed_National 6_StateBoundary All Roads in the Western United States All Interstates and State and Federal Highways in the Western United States All Secondary Roads in the Western United States Canals in the Western United States All Interstates in the Western United States Human Population in the Western United States (1900 - 2000) All Roads in the Western United States Electrical resistivity tomography in the Air Force Research Laboratory Northeast AFRL and Arroyos Groundwater Areas, Edwards Air Force Base, California 2022 Great Salt Lake TBDEM Spatial Metadata Electrical resistivity tomography in the Air Force Research Laboratory Northeast AFRL and Arroyos Groundwater Areas, Edwards Air Force Base, California 2022 Great Salt Lake TBDEM Spatial Metadata 6_StateBoundary All Interstates in the Western United States Canals in the Western United States All Interstates and State and Federal Highways in the Western United States All Secondary Roads in the Western United States All Roads in the Western United States All Roads in the Western United States Human Population in the Western United States (1900 - 2000) States_Detailed_National 2008 Climate Science Center Regions shapefile Web Mercator 2008 Climate Science Center Regions shapefile