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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: AK, Administrative watershed units, Administrative watershed units, Alaska, Area of Complex Channels, 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...


map background search result map search result map USGS Topo Map Vector Data (Vector) 335868 Bradfield Canal A-2 SW AK (published 20241210) FileGDB USGS Topo Map Vector Data (Vector) 334248 Ketchikan D-2 SE AK (published 20241209) Shapefile USGS Topo Map Vector Data (Vector) 334255 Ketchikan D-3 NW AK (published 20241209) Shapefile USGS Watershed Boundary Dataset (WBD) for 2-digit Hydrologic Unit - 19 (published 20250108) Shapefile USGS National Hydrography Dataset Best Resolution (NHD) for Hydrological Unit (HU) 8 - 19010106 (published 20231220) Shapefile USGS Topo Map Vector Data (Vector) 335894 Prince Rupert D-4 SW AK (published 20241210) FileGDB USGS Topo Map Vector Data (Vector) 335907 Prince Rupert D-5 NW AK (published 20241210) FileGDB USGS Topo Map Vector Data (Vector) 335882 Bradfield Canal A-4 NE AK (published 20241210) FileGDB USGS Topo Map Vector Data (Vector) 335871 Bradfield Canal A-4 SE AK (published 20241210) Shapefile USGS Topo Map Vector Data (Vector) 76724 Ketchikan B-5 SE AK (published 20241212) FileGDB USGS National Structures Dataset (NSD) Alaska (published 20240215) FileGDB USGS Topo Map Vector Data (Vector) 334076 Ketchikan B-6 SW AK (published 20241128) GeoPackage USGS Topo Map Vector Data (Vector) 334179 Ketchikan B-4 NE AK (published 20241209) GeoPackage USGS Topo Map Vector Data (Vector) 334195 Ketchikan A-4 NE AK (published 20241209) GeoPackage USGS Topo Map Vector Data (Vector) 334199 Ketchikan A-5 NE AK (published 20241209) GeoPackage USGS Topo Map Vector Data (Vector) 334209 Ketchikan B-2 SE AK (published 20241209) GeoPackage USGS Topo Map Vector Data (Vector) 334215 Ketchikan B-3 NE AK (published 20241209) GeoPackage USGS Topo Map Vector Data (Vector) 334222 Ketchikan C-1 NE AK (published 20241209) GeoPackage USGS Topo Map Vector Data (Vector) 334245 Ketchikan D-1 SW AK (published 20241209) GeoPackage USGS Topo Map Vector Data (Vector) 334252 Ketchikan D-3 SE AK (published 20241209) GeoPackage USGS Topo Map Vector Data (Vector) 335894 Prince Rupert D-4 SW AK (published 20241210) FileGDB USGS Topo Map Vector Data (Vector) 334215 Ketchikan B-3 NE AK (published 20241209) GeoPackage USGS Topo Map Vector Data (Vector) 334245 Ketchikan D-1 SW AK (published 20241209) GeoPackage USGS Topo Map Vector Data (Vector) 334252 Ketchikan D-3 SE AK (published 20241209) GeoPackage USGS Topo Map Vector Data (Vector) 335868 Bradfield Canal A-2 SW AK (published 20241210) FileGDB USGS Topo Map Vector Data (Vector) 334248 Ketchikan D-2 SE AK (published 20241209) Shapefile USGS Topo Map Vector Data (Vector) 334255 Ketchikan D-3 NW AK (published 20241209) Shapefile USGS Topo Map Vector Data (Vector) 335907 Prince Rupert D-5 NW AK (published 20241210) FileGDB USGS Topo Map Vector Data (Vector) 335882 Bradfield Canal A-4 NE AK (published 20241210) FileGDB USGS Topo Map Vector Data (Vector) 335871 Bradfield Canal A-4 SE AK (published 20241210) Shapefile USGS Topo Map Vector Data (Vector) 76724 Ketchikan B-5 SE AK (published 20241212) FileGDB USGS Topo Map Vector Data (Vector) 334076 Ketchikan B-6 SW AK (published 20241128) GeoPackage USGS Topo Map Vector Data (Vector) 334179 Ketchikan B-4 NE AK (published 20241209) GeoPackage USGS Topo Map Vector Data (Vector) 334195 Ketchikan A-4 NE AK (published 20241209) GeoPackage USGS Topo Map Vector Data (Vector) 334199 Ketchikan A-5 NE AK (published 20241209) GeoPackage USGS Topo Map Vector Data (Vector) 334209 Ketchikan B-2 SE AK (published 20241209) GeoPackage USGS Topo Map Vector Data (Vector) 334222 Ketchikan C-1 NE AK (published 20241209) GeoPackage USGS National Hydrography Dataset Best Resolution (NHD) for Hydrological Unit (HU) 8 - 19010106 (published 20231220) Shapefile USGS National Structures Dataset (NSD) Alaska (published 20240215) FileGDB USGS Watershed Boundary Dataset (WBD) for 2-digit Hydrologic Unit - 19 (published 20250108) Shapefile