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Service Description: The National Hydrography Dataset (NHD) 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 supports many applications, such as making maps, geocoding observations, flow modeling, data maintenance and stewardship. For additional information, go to
http://nhd.usgs.gov.
Map Name: Layers
Legend
All Layers and Tables
Layers:
Tables:
Description:
Copyright Text:
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Document Info:
- Title: TNM Hydrography - Small Scale
- Author: U.S. Geological Survey - National Geospatial Program
- Comments: See http:
//viewer.nationalmap.gov/help for
assistance with TNM services or metadata.
- Subject:
- Category:
- Keywords:
- AntialiasingMode: None
- TextAntialiasingMode: Force
Supported Interfaces:
REST
SOAP
WMS
Supported Operations:
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