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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...
Types: Citation; Tags: Flow direction network, boundaries, National Hydrography Dataset (NHD), Gaging Station, Water Intake Outflow, 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...
Types: Citation; Tags: Flow direction network, boundaries, National Hydrography Dataset (NHD), Gaging Station, Water Intake Outflow, 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...
Types: Citation; Tags: geographic information systems, National Hydrography Dataset (NHD), watersheds, geoscientific, geospatial analysis, All tags...
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Layers of geospatial data include contours, boundaries, land cover, hydrography, roads, transportation, geographic names, structures, and other selected map features.
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Layers of geospatial data include contours, boundaries, land cover, hydrography, roads, transportation, geographic names, structures, and other selected map features.
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Layers of geospatial data include contours, boundaries, land cover, hydrography, roads, transportation, geographic names, structures, and other selected map features.
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Background In recent years, more and more people have become concerned about Long Island's supply of freshwater. Currently, there is no comprehensive, island-wide resource that summarizes recent U.S. Geological Survey (USGS) research related to the Island's aquifer system. A webpage will be developed by the USGS that will compile published data from the hydrologic-surveillance program, in place since the mid-1970’s, and various USGS sources, and supplement this information with more recent seasonal and annual hydrologic technical assistance will be provided to the Suffolk County Water Authority (SCWA) to help them produce an easy to understand annual report that will provide a snapshot of the state of Long Island's...
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Layers of geospatial data include contours, boundaries, land cover, hydrography, roads, transportation, geographic names, structures, and other selected map features.
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Layers of geospatial data include geographic names, hydrography, and other selected map features. The map layer was produced from the Medium-Resolution National Hydrography Dataset feature classes, through feature selection and cartographic generalization, based on reference to published small-scale ancillary data sets.
Types: Citation; Tags: Flow direction network, boundaries, US-MA-Hampden, National Hydrography Dataset (NHD), Gaging Station, All tags...
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Layers of geospatial data include geographic names, hydrography, and other selected map features. The map layer was produced from the Medium-Resolution National Hydrography Dataset feature classes, through feature selection and cartographic generalization, based on reference to published small-scale ancillary data sets.
Types: Citation; Tags: US-PA-Philadelphia, Flow direction network, boundaries, Cumberland County, Delaware, All tags...


map background search result map search result map State of the Aquifer, Long Island, New York USGS National Hydrography Dataset (NHD) Medium Resolution for Rhode Island 20140903 State or Territory Shapefile USGS National Hydrography Dataset (NHD) Medium Resolution for New Jersey 20140807 State or Territory FileGDB 10.1 USGS National Hydrography Dataset (NHD) Best Resolution for 20160831 State or Territory FileGDB 10.1 Model Version 2.2.1 USGS National Hydrography Dataset (NHD) Best Resolution 20170914 for Connecticut State or Territory FileGDB 10.1 Model Version 2.2.1 USGS National Hydrography Dataset Plus High Resolution (NHDPlus HR) for HU4-0203 (Subregion) Publication Date 20170608 HU-4 Subregion USGS Topo Map Vector Data (Vector) 76296 Clinton OE S, Connecticut 20161217 for 7.5 x 7.5 minute Shapefile USGS Combined Vector for Mattituck Hills, New York 20160804 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 31784 New London, Connecticut 20161220 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 31784 New London, Connecticut 20161220 for 7.5 x 7.5 minute Shapefile USGS Combined Vector for Bay Shore West, New York 20160805 7.5 x 7.5 minute FileGDB 10.1 USGS Combined Vector for Bay Shore East OE S, New York 20160806 7.5 x 7.5 minute Shapefile USGS Combined Vector for Bay Shore West OE S, New York 20160804 7.5 x 7.5 minute Shapefile USGS Combined Vector for Napeague Beach, New York 20160805 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 32015 Newton, Massachusetts 20161217 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 32610 Norwood, Massachusetts 20161217 for 7.5 x 7.5 minute FileGDB 10.1 USGS Combined Vector for Plum Island OE E, New York 20160804 7.5 x 7.5 minute FileGDB 10.1 USGS Combined Vector for Sag Harbor, New York 20160805 7.5 x 7.5 minute FileGDB 10.1 USGS Combined Vector for Sag Harbor OE S, New York 20160804 7.5 x 7.5 minute FileGDB 10.1 USGS Combined Vector for West Gilgo Beach, New York 20160804 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 76296 Clinton OE S, Connecticut 20161217 for 7.5 x 7.5 minute Shapefile USGS Combined Vector for Mattituck Hills, New York 20160804 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 31784 New London, Connecticut 20161220 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 31784 New London, Connecticut 20161220 for 7.5 x 7.5 minute Shapefile USGS Combined Vector for Bay Shore West, New York 20160805 7.5 x 7.5 minute FileGDB 10.1 USGS Combined Vector for Bay Shore East OE S, New York 20160806 7.5 x 7.5 minute Shapefile USGS Combined Vector for Bay Shore West OE S, New York 20160804 7.5 x 7.5 minute Shapefile USGS Combined Vector for Napeague Beach, New York 20160805 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 32015 Newton, Massachusetts 20161217 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 32610 Norwood, Massachusetts 20161217 for 7.5 x 7.5 minute FileGDB 10.1 USGS Combined Vector for Plum Island OE E, New York 20160804 7.5 x 7.5 minute FileGDB 10.1 USGS Combined Vector for Sag Harbor, New York 20160805 7.5 x 7.5 minute FileGDB 10.1 USGS Combined Vector for Sag Harbor OE S, New York 20160804 7.5 x 7.5 minute FileGDB 10.1 USGS Combined Vector for West Gilgo Beach, New York 20160804 7.5 x 7.5 minute Shapefile State of the Aquifer, Long Island, New York USGS National Hydrography Dataset Plus High Resolution (NHDPlus HR) for HU4-0203 (Subregion) Publication Date 20170608 HU-4 Subregion USGS National Hydrography Dataset (NHD) Best Resolution 20170914 for Connecticut State or Territory FileGDB 10.1 Model Version 2.2.1 USGS National Hydrography Dataset (NHD) Medium Resolution for Rhode Island 20140903 State or Territory Shapefile USGS National Hydrography Dataset (NHD) Best Resolution for 20160831 State or Territory FileGDB 10.1 Model Version 2.2.1 USGS National Hydrography Dataset (NHD) Medium Resolution for New Jersey 20140807 State or Territory FileGDB 10.1