This map was produced with Digital Line Graph (DLG) data available from the U.S. Geological Survey EROS Data Center.
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U.S. Department of the Interior | U.S. Geological Survey URL: https://geochange.er.usgs.gov/sw/resources/sw_basemap/ Page Maintainer: Randy Schumann Page Last Modified: Fri 9-Dec-2016 14:28:28 MST