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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 High Resolution National Hydrography Dataset Plus (NHDPlus HR) is an integrated set of geospatial data layers, including the National Hydrography Dataset (NHD), National Watershed Boundary Dataset (WBD), and 3D Elevation Program Digital Elevation Model (3DEP DEM). The NHDPlus HR combines the NHD, 3DEP DEMs, and WBD to a data suite that includes the NHD stream network with linear referencing functionality, the WBD hydrologic units, elevation-derived catchment areas for each stream segment, "value added attributes" (VAAs), and other features that enhance hydrologic data analysis and routing.
Tags: 4-digit hydrologic unit, Accomack County, Albemarle County, Alleghany County, Amelia County, All tags...


map background search result map search result map USGS Topo Map Vector Data (Vector) 336096 Sumdum C-6 NE, Alaska 20210916 for 7.5 x 7.5 minute Shapefile USGS NED 1/3 arc-second Contours for Sumdum W, Alaska 20210929 1 X 1 degree FileGDB 10.1 USGS Topo Map Vector Data (Vector) 334122 Petersburg B-3 NE, Alaska 20210917 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 71217 Petersburg C-3 NE, Alaska 20210916 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 334163 Petersburg D-3 NE, Alaska 20210916 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 334142 Petersburg C-2 NW, Alaska 20210916 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 334165 Petersburg D-4 SW, Alaska 20210916 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 334169 Petersburg D-5 SW, Alaska 20210916 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 336051 Sumdum A-1 NW, Alaska 20210916 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 336043 Sumdum A-3 SE, Alaska 20210916 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 336048 Sumdum A-5 SW, Alaska 20210916 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 336059 Sumdum A-5 NW, Alaska 20210917 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 336047 Sumdum A-5 SE, Alaska 20210916 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 336062 Sumdum B-2 SE, Alaska 20210917 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 334150 Petersburg C-5 NW, Alaska 20210916 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 334168 Petersburg D-5 SE, Alaska 20210917 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 334127 Petersburg B-4 NW, Alaska 20210917 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 336086 Sumdum C-5 SE, Alaska 20210917 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 336078 Sumdum B-5 NE, Alaska 20210917 for 7.5 x 7.5 minute Shapefile USGS National Hydrography Dataset Plus High Resolution (NHDPlus HR) for Hydrological Unit (HU) 4 - 0208 (published 20220324) USGS Topo Map Vector Data (Vector) 336096 Sumdum C-6 NE, Alaska 20210916 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 334122 Petersburg B-3 NE, Alaska 20210917 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 71217 Petersburg C-3 NE, Alaska 20210916 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 334163 Petersburg D-3 NE, Alaska 20210916 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 334165 Petersburg D-4 SW, Alaska 20210916 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 336051 Sumdum A-1 NW, Alaska 20210916 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 336043 Sumdum A-3 SE, Alaska 20210916 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 334127 Petersburg B-4 NW, Alaska 20210917 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 334142 Petersburg C-2 NW, Alaska 20210916 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 334169 Petersburg D-5 SW, Alaska 20210916 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 336048 Sumdum A-5 SW, Alaska 20210916 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 336059 Sumdum A-5 NW, Alaska 20210917 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 336047 Sumdum A-5 SE, Alaska 20210916 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 336062 Sumdum B-2 SE, Alaska 20210917 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 334150 Petersburg C-5 NW, Alaska 20210916 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 334168 Petersburg D-5 SE, Alaska 20210917 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 336086 Sumdum C-5 SE, Alaska 20210917 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 336078 Sumdum B-5 NE, Alaska 20210917 for 7.5 x 7.5 minute Shapefile USGS NED 1/3 arc-second Contours for Sumdum W, Alaska 20210929 1 X 1 degree FileGDB 10.1 USGS National Hydrography Dataset Plus High Resolution (NHDPlus HR) for Hydrological Unit (HU) 4 - 0208 (published 20220324)