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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...
Types: Citation;
Tags: HU,
Hydrography,
NGDA,
NGP-TNM,
NHD, All tags...
National Geospatial Data Asset,
Overlay Map Service,
REST,
US,
United States,
WBD,
WMS,
Water Inland Theme,
a-16,
basin,
canal,
dam,
ditch,
drainage,
gage,
gaging station,
hydrography,
hydrologic unit,
inlandWaters,
lake,
marsh,
pond,
region,
reservoir,
river,
spring,
stream,
subbasin,
subregion,
subwatershed,
swamp,
water,
water - inland,
watershed,
well, Fewer tags
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