Dataset Identification:
Resource Abstract:
- description: The USGS National Hydrography Dataset (NHD) service from The National Map (TNM) is a comprehensive set of digital
spatial data that encodes information about naturally occurring and constructed bodies of surface water (lakes, ponds, and
reservoirs), paths through which water flows (canals, ditches, streams, and rivers), and related entities such as point features
(springs, wells, stream gages, and dams). The information encoded about these features includes classification and other characteristics,
delineation, geographic name, position and related measures, a "reach code" through which other information can
be related to the NHD, and the direction of water flow. The network of reach codes delineating water and transported material
flow allows users to trace movement in upstream and downstream directions. In addition to this geographic information, the
dataset contains metadata that supports the exchange of future updates and improvements to the data. The NHD is available
nationwide in two seamless datasets, one based on 1:24,000-scale maps and referred to as high resolution NHD, and the other
based on 1:100,000-scale maps and referred to as medium resolution NHD. Additional selected areas in the United States are
available based on larger scales, such as 1:5,000-scale or greater, and referred to as local resolution NHD. The NHD from
The National Map supports many applications, such as making maps, geocoding observations, flow modeling, data maintenance,
and stewardship. For additional information on the NHD, go to https://nhd.usgs.gov/index.html. The Watershed Boundary Dataset
(WBD) is a companion dataset to the NHD. It defines the perimeter of drainage areas formed by the terrain and other landscape
characteristics. The drainage areas are nested within each other so that a large drainage area, such as the Upper Mississippi
River, will be composed of multiple smaller drainage areas, such as the Wisconsin River. Each of these smaller areas can further
be subdivided into smaller and smaller drainage areas. The WBD uses six different levels in this hierarchy, with the smallest
averaging about 30,000 acres. The WBD is made up of polygons nested into six levels of data respectively defined by Regions,
Subregions, Basins, Subbasins, Watersheds, and Subwatersheds. For additional information on the WBD, go to https://nhd.usgs.gov/wbd.html.
The National Map hydrography data is commonly combined with other data themes, such as boundaries, elevation, structures,
and transportation, to produce general reference base maps. The National Map viewer allows free downloads of public domain
NHD and WBD data in either Esri File or Personal Geodatabase, or Shapefile formats.; abstract: The USGS National Hydrography
Dataset (NHD) service from The National Map (TNM) is a comprehensive set of digital spatial data that encodes information
about naturally occurring and constructed bodies of surface water (lakes, ponds, and reservoirs), paths through which water
flows (canals, ditches, streams, and rivers), and related entities such as point features (springs, wells, stream gages, and
dams). The information encoded about these features includes classification and other characteristics, delineation, geographic
name, position and related measures, a "reach code" through which other information can be related to the NHD, and
the direction of water flow. The network of reach codes delineating water and transported material flow allows users to trace
movement in upstream and downstream directions. In addition to this geographic information, the dataset contains metadata
that supports the exchange of future updates and improvements to the data. The NHD is available nationwide in two seamless
datasets, one based on 1:24,000-scale maps and referred to as high resolution NHD, and the other based on 1:100,000-scale
maps and referred to as medium resolution NHD. Additional selected areas in the United States are available based on larger
scales, such as 1:5,000-scale or greater, and referred to as local resolution NHD. The NHD from The National Map supports
many applications, such as making maps, geocoding observations, flow modeling, data maintenance, and stewardship. For additional
information on the NHD, go to https://nhd.usgs.gov/index.html. The Watershed Boundary Dataset (WBD) is a companion dataset
to the NHD. It defines the perimeter of drainage areas formed by the terrain and other landscape characteristics. The drainage
areas are nested within each other so that a large drainage area, such as the Upper Mississippi River, will be composed of
multiple smaller drainage areas, such as the Wisconsin River. Each of these smaller areas can further be subdivided into smaller
and smaller drainage areas. The WBD uses six different levels in this hierarchy, with the smallest averaging about 30,000
acres. The WBD is made up of polygons nested into six levels of data respectively defined by Regions, Subregions, Basins,
Subbasins, Watersheds, and Subwatersheds. For additional information on the WBD, go to https://nhd.usgs.gov/wbd.html. The
National Map hydrography data is commonly combined with other data themes, such as boundaries, elevation, structures, and
transportation, to produce general reference base maps. The National Map viewer allows free downloads of public domain NHD
and WBD data in either Esri File or Personal Geodatabase, or Shapefile formats.
Citation
- Title USGS Hydrography (NHD) Overlay Map Service from The National Map - National Geospatial Data Asset (NGDA) National Hydrography
Dataset (NHD).
-
- creation Date
2018-02-08T08:34:50.697017
Resource language:
Processing environment:
Back to top:
Metadata data stamp:
2018-08-06T19:51:45Z
Resource Maintenance Information
- maintenance or update frequency:
- notes: This metadata record was generated by an xslt transformation from a dc metadata record; Transform by Stephen M. Richard, based
on a transform by Damian Ulbricht. Run on 2018-08-06T19:51:45Z
Metadata contact
-
pointOfContact
- organisation Name
CINERGI Metadata catalog
-
- Contact information
-
-
- Address
-
- electronic Mail Address cinergi@sdsc.edu
Metadata language
eng
Metadata character set encoding:
utf8
Metadata standard for this record:
ISO 19139 Geographic Information - Metadata - Implementation Specification
standard version:
2007
Metadata record identifier:
urn:dciso:metadataabout:370a4f7c-35bb-4ce4-aa3e-7b24fd9ff034
Metadata record format is ISO19139 XML (MD_Metadata)