@prefix ns0: <https://gcmd.earthdata.nasa.gov/kms#> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .

<https://gcmd.earthdata.nasa.gov/kms/concept/40e27904-26e2-4743-83ee-51aabff06a7f>
  ns0:resource [ ] ;
  ns0:altLabel [ ] ;
  skos:broader <https://gcmd.earthdata.nasa.gov/kms/concept/5fea4160-25a7-44b5-bfba-ef140fdffaf4> ;
  skos:prefLabel "DOI/USGS/GEOG/MCMC/NHD"@en ;
  skos:inScheme <https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/providers> ;
  skos:definition """The National Hydrography Dataset (NHD) is a comprehensive set of digital
spatial data that contains information about surface water features such as
lakes, ponds, streams, rivers, springs and wells. Within the NHD, surface
water features are combined to form "reaches," which provide the framework for
linking water-related data to the NHD surface water drainage ... network. These
linkages enable the analysis and display of these water-related data in
upstream and downstream order. The NHD is based upon the content of USGS
Digital Line Graph (DLG) hydrography data integrated with reach-related
information from the EPA Reach File Version 3 (RF3). The NHD supersedes DLG
and RF3 by incorporating them, not by replacing them. Users of DLG or RF3 will
find the National Hydrography Dataset both familiar and greatly expanded and
refined. While initially based on 1:100,000-scale data, the NHD is designed to
incorporate and encourage the development of higher resolution data required by
many users.

[Summary extracted from http://nhd.usgs.gov/index.html"""@en ;
  a skos:Concept .

<https://gcmd.earthdata.nasa.gov/kms/concept/5fea4160-25a7-44b5-bfba-ef140fdffaf4>
  skos:prefLabel "USGS"@en ;
  a skos:Concept ;
  skos:narrower <https://gcmd.earthdata.nasa.gov/kms/concept/40e27904-26e2-4743-83ee-51aabff06a7f> .