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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: Anne Arundel County, Baltimore County, Baltimore County, Calvert County, Caroline County, All tags...
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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: Abbeville County, Aiken County, Alexander County, Allendale County, Anderson County, All tags...
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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...
Tags: Accomack County, Adams County, Administrative watershed units, Administrative watershed units, Alamance County, All tags...
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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...
Tags: Accomack County, Administrative watershed units, Administrative watershed units, Albemarle County, Alleghany County, All tags...
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The Watershed Boundary Dataset (WBD) is a comprehensive aggregated collection of hydrologic unit data consistent with the national criteria for delineation and resolution. It defines the areal extent of surface water drainage to a point except in coastal or lake front areas where there could be multiple outlets as stated by the "Federal Standards and Procedures for the National Watershed Boundary Dataset (WBD)" "Standard" (https://pubs.usgs.gov/tm/11/a3/). Watershed boundaries are determined solely upon science-based hydrologic principles, not favoring any administrative boundaries or special projects, nor particular program or agency. This dataset represents the hydrologic unit boundaries to the 12-digit (6th level)...
Tags: 10-digit, 12-digit, 14-digit, 16-digit, 2-digit, All tags...
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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...
Tags: Administrative watershed units, Administrative watershed units, Area of Complex Channels, Area to be submerged, Basin, All tags...
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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...
Tags: Accomack County, Administrative watershed units, Administrative watershed units, Albemarle County, Alleghany County, All tags...


map background search result map search result map USGS Topo Map Vector Data (Vector) 4274 Blackwater River, Maryland 20170223 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 6838 Cambridge, Maryland 20170223 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 76405 Chesapeake Bay 2 (All Water), Maryland 20170223 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 8473 Chicamacomico River, Maryland 20170222 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 8721 Church Creek, Maryland 20170225 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 13406 East New Market, Maryland 20170222 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 17625 Golden Hill, Maryland 20170225 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 21360 Hudson, Maryland 20170223 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 23125 Kedges Straits, Maryland 20170222 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 33775 Oxford, Maryland 20170223 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 35790 Point No Point, Maryland 20170223 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 40815 Sharptown, Maryland 20170223 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 45121 Tilghman, Maryland 20170226 for 7.5 x 7.5 minute FileGDB 10.1 USGS Watershed Boundary Dataset (WBD) for 2-digit Hydrologic Unit - 03 (published 20190102) USGS National Hydrography Dataset Best Resolution (NHD) for Hydrologic Unit (HU) 4 - 0208 (published 20190101) USGS National Hydrography Dataset Best Resolution (NHD) for Hydrologic Unit (HU) 4 - 0208 (published 20190101) USGS National Hydrography Dataset Best Resolution (NHD) for Hydrologic Unit (HU) 8 - 03050201 (published 20190104) USGS National Hydrography Dataset (NHD) Best Resolution 20181220 for Virginia State or Territory Shapefile Model Version 2.2.1 USGS National Hydrography Dataset Plus High Resolution (NHDPlus HR) for 4-digit Hydrologic Unit - 0206 (published 20180813) USGS National Hydrography Dataset Plus High Resolution (NHDPlus HR) for 4-digit Hydrologic Unit - 0305 (published 20180813) USGS Topo Map Vector Data (Vector) 4274 Blackwater River, Maryland 20170223 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 6838 Cambridge, Maryland 20170223 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 76405 Chesapeake Bay 2 (All Water), Maryland 20170223 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 8473 Chicamacomico River, Maryland 20170222 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 8721 Church Creek, Maryland 20170225 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 13406 East New Market, Maryland 20170222 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 17625 Golden Hill, Maryland 20170225 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 21360 Hudson, Maryland 20170223 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 23125 Kedges Straits, Maryland 20170222 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 33775 Oxford, Maryland 20170223 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 35790 Point No Point, Maryland 20170223 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 40815 Sharptown, Maryland 20170223 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 45121 Tilghman, Maryland 20170226 for 7.5 x 7.5 minute FileGDB 10.1 USGS National Hydrography Dataset Best Resolution (NHD) for Hydrologic Unit (HU) 8 - 03050201 (published 20190104) USGS National Hydrography Dataset Plus High Resolution (NHDPlus HR) for 4-digit Hydrologic Unit - 0206 (published 20180813) USGS National Hydrography Dataset Best Resolution (NHD) for Hydrologic Unit (HU) 4 - 0208 (published 20190101) USGS National Hydrography Dataset Best Resolution (NHD) for Hydrologic Unit (HU) 4 - 0208 (published 20190101) USGS National Hydrography Dataset Plus High Resolution (NHDPlus HR) for 4-digit Hydrologic Unit - 0305 (published 20180813) USGS National Hydrography Dataset (NHD) Best Resolution 20181220 for Virginia State or Territory Shapefile Model Version 2.2.1 USGS Watershed Boundary Dataset (WBD) for 2-digit Hydrologic Unit - 03 (published 20190102)