United States Geological Survey hydrologic unit codes

E242036

United States Geological Survey hydrologic unit codes are a standardized numerical system used to uniquely identify and organize the nation’s watersheds and drainage basins for hydrologic mapping and analysis.

All labels observed (4)

How this entity was disambiguated

Statements (51)

Predicate Object
instanceOf geospatial identifier system
hydrologic classification system
watershed coding system
alsoKnownAs HUC codes
United States Geological Survey hydrologic unit codes
surface form: USGS hydrologic unit codes

hydrologic unit codes
appliesTo drainage basins
subwatersheds
surface water drainage areas
watersheds
codeLengthAtLevel 10-digit watershed code
12-digit subwatershed code
2-digit region code
4-digit subregion code
6-digit accounting unit code
8-digit cataloging unit code
countryOfUse United States of America
surface form: United States
developedBy United States Geological Survey
governedBy USGS hydrologic unit system guidelines
hasProperty fixed-length numeric codes
nationwide coverage
nested structure
unique numeric identifiers
maximumCodeLength 12 digits
minimumCodeLength 2 digits
organizedAs hierarchical system
partOf National Hydrography Dataset
relatedTo United States Geological Survey hydrologic unit codes self-linksurface differs
surface form: National Watershed Boundary Dataset

watershed boundaries dataset
standardizedBy United States Geological Survey
standardType federal hydrologic unit standard
topLevelUnit region
topLevelUnitCount 21 hydrologic regions
usedBy GIS professionals
environmental scientists
federal agencies
local governments
state agencies
water resource managers
usedFor environmental planning
flood risk assessment
hydrologic data organization
hydrologic mapping
identification of drainage basins
identification of watersheds
water quality assessment
water resources analysis
watershed management
usedIn geographic information systems
hydrologic modeling
national water data systems

How these facts were elicited

Referenced by (4)

Full triples — surface form annotated when it differs from this entity's canonical label.

Mississippi River basin hydrologicCodeSystem United States Geological Survey hydrologic unit codes
United States Geological Survey hydrologic unit codes alsoKnownAs United States Geological Survey hydrologic unit codes
this entity surface form: USGS hydrologic unit codes
United States Geological Survey hydrologic unit codes relatedTo United States Geological Survey hydrologic unit codes self-linksurface differs
this entity surface form: National Watershed Boundary Dataset
Ohio River basin hydrologicUnitCodeSystem United States Geological Survey hydrologic unit codes
this entity surface form: USGS HUC system