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These vector contour lines are derived from the 3D Elevation Program using automated and semi-automated processes. They were created to support 1:24,000-scale CONUS and Hawaii, 1:25,000-scale Alaska, and 1:20,000-scale Puerto Rico / US Virgin Island topographic map products, but are also published in this GIS vector format. Contour intervals are assigned by 7.5-minute quadrangle, so this vector dataset is not visually seamless across quadrangle boundaries. The vector lines have elevation attributes (in feet above mean sea level on NAVD88), but this dataset does not carry line symbols or annotation.
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These vector contour lines are derived from the 3D Elevation Program using automated and semi-automated processes. They were created to support 1:24,000-scale CONUS and Hawaii, 1:25,000-scale Alaska, and 1:20,000-scale Puerto Rico / US Virgin Island topographic map products, but are also published in this GIS vector format. Contour intervals are assigned by 7.5-minute quadrangle, so this vector dataset is not visually seamless across quadrangle boundaries. The vector lines have elevation attributes (in feet above mean sea level on NAVD88), but this dataset does not carry line symbols or annotation.
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The National Hydrography Dataset (NHD) is a feature-based database that interconnects and uniquely identifies the stream segments or reaches that make up the nation's surface water drainage system. NHD data was originally developed at 1:100,000-scale and exists at that scale for the whole country. This high-resolution NHD, generally developed at 1:24,000/1:12,000 scale, adds detail to the original 1:100,000-scale NHD. (Data for Alaska, Puerto Rico and the Virgin Islands was developed at high-resolution, not 1:100,000 scale.) Local resolution NHD is being developed where partners and data exist. The NHD contains reach codes for networked features, flow direction, names, and centerline representations for areal water...
Categories: Data; Types: ArcGIS REST Map Service, ArcGIS Service Definition, Downloadable, Map Service; Tags: AL, Administrative watershed units, Alabama, Alcorn County, Area of Complex Channels, All tags...


map background search result map search result map USGS National Hydrography Dataset (NHD) Best Resolution for Alabama 20160411 State or Territory FileGDB 10.1 - Flowlines USGS Topo Map Vector Data (Vector) 1848 Augusta, Michigan 20200707 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 8630 Chloe, West Virginia 20200414 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 22208 Ivydale, West Virginia 20200414 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 27109 MacFarlan, West Virginia 20200417 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 41816 Smithville, West Virginia 20200416 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 12923 Duck Lake, Michigan 20200708 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 46333 Union City, Michigan 20200708 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 17919 Grafton, Illinois 20210629 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 23018 Kampsville, Illinois 20210628 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 30373 Mosherville, Michigan 20200708 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 1455 Arlington, Georgia 20200914 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 2860 Bearden, Arkansas 20200916 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 8950 Clarksville, Missouri 20210623 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 13346 East Camden, Arkansas 20200915 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 15121 Felderville, South Carolina 20200828 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 13687 Edison, Georgia 20200914 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 30266 Moro Bay, Arkansas 20200916 for 7.5 x 7.5 minute FileGDB 10.1 USGS NED 1/3 arc-second Contours for Augusta W, Georgia 20200914 1 X 1 degree Shapefile USGS NED 1/3 arc-second Contours for Grand Rapids W, Michigan 20200306 1 X 1 degree Shapefile USGS Topo Map Vector Data (Vector) 1848 Augusta, Michigan 20200707 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 8630 Chloe, West Virginia 20200414 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 22208 Ivydale, West Virginia 20200414 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 27109 MacFarlan, West Virginia 20200417 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 41816 Smithville, West Virginia 20200416 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 12923 Duck Lake, Michigan 20200708 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 46333 Union City, Michigan 20200708 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 17919 Grafton, Illinois 20210629 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 23018 Kampsville, Illinois 20210628 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 30373 Mosherville, Michigan 20200708 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 1455 Arlington, Georgia 20200914 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 2860 Bearden, Arkansas 20200916 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 8950 Clarksville, Missouri 20210623 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 13346 East Camden, Arkansas 20200915 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 15121 Felderville, South Carolina 20200828 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 13687 Edison, Georgia 20200914 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 30266 Moro Bay, Arkansas 20200916 for 7.5 x 7.5 minute FileGDB 10.1 USGS NED 1/3 arc-second Contours for Augusta W, Georgia 20200914 1 X 1 degree Shapefile USGS NED 1/3 arc-second Contours for Grand Rapids W, Michigan 20200306 1 X 1 degree Shapefile USGS National Hydrography Dataset (NHD) Best Resolution for Alabama 20160411 State or Territory FileGDB 10.1 - Flowlines