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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 best available National Hydrography Dataset (NHD), the 10-meter 3D Elevation Program Digital Elevation Model (3DEP DEM), and the National Watershed Boundary Dataset (WBD). The NHDPlus HR combines the NHD, 3DEP DEMs, and WBD to create a stream network with linear referencing, feature naming, "value added attributes" (VAAs), elevation-derived catchments, and other features for hydrologic data analysis. The stream network with linear referencing is a system of data relationships applied to hydrographic systems so that one stream reach "flows" into another and "events" can be tied to and traced...
Tags: Alleghany County, Alleghany County, Ashe County, Bath County, Bland County, All tags...
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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.
thumbnail
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.


    map background search result map search result map USGS Topo Map Vector Data (Vector) 16662 Galax VA (published 20221019) FileGDB USGS Topo Map Vector Data (Vector) 16662 Galax VA (published 20221019) Shapefile USGS NED 1/3 arc-second Contours for Winston-Salem E, North Carolina 1 x 1 degree (published 20221018) Shapefile USGS NED 1/3 arc-second Contours for Winston-Salem E, North Carolina 1 x 1 degree (published 20221018) FileGDB USGS National Hydrography Dataset Plus High Resolution (NHDPlus HR) for 4-digit Hydrologic Unit - 0505 (published 20180813) USGS NED 1/3 arc-second Contours for Winston-Salem E, North Carolina 1 x 1 degree (published 20221018) GeoPackage USGS Topo Map Vector Data (Vector) 16662 Galax VA (published 20221019) GeoPackage USGS Topo Map Vector Data (Vector) 16662 Galax VA (published 20221019) FileGDB USGS Topo Map Vector Data (Vector) 16662 Galax VA (published 20221019) Shapefile USGS Topo Map Vector Data (Vector) 16662 Galax VA (published 20221019) GeoPackage USGS NED 1/3 arc-second Contours for Winston-Salem E, North Carolina 1 x 1 degree (published 20221018) Shapefile USGS NED 1/3 arc-second Contours for Winston-Salem E, North Carolina 1 x 1 degree (published 20221018) FileGDB USGS NED 1/3 arc-second Contours for Winston-Salem E, North Carolina 1 x 1 degree (published 20221018) GeoPackage USGS National Hydrography Dataset Plus High Resolution (NHDPlus HR) for 4-digit Hydrologic Unit - 0505 (published 20180813)