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USGS National Boundary Dataset (NBD) Downloadable Data Collection
The USGS Governmental Unit Boundaries dataset from The National Map (TNM) represents major civil areas for the Nation, including States or Territories, counties (or... -
USGS Governmental Unit Boundaries Overlay Map Service from The National Map
The USGS Governmental Unit Boundaries service from The National Map (TNM) represents major civil areas for the Nation, including States or Territories, counties (or...