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Please refer to the feature-level metadata for information on the data source. The National Map boundaries data is commonly combined with other data themes, such as elevation, hydrography, structures, and transportation, to produce general reference base maps. The National Map download client allows free downloads of public domain boundaries data in either Esri File Geodatabase or Shapefile formats. See https://apps.nationalmap.gov/help/ for assistance with The National Map viewer, download client, services, or metadata.", "connectionString": "url=https://carto.nationalmap.gov/arcgis/rest/services/govunits/MapServer;layerMask=Features/Tennessee Valley Authority", "copyright": "USGS The National Map: National Boundaries Dataset. 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