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 (7)

How this entity was disambiguated

Statements (51)

Predicate Object
instanceOf geospatial identifier system ⓘ
hydrologic classification system ⓘ
watershed coding system ⓘ
alsoKnownAs HUC codes ⓘ
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 ⓘ
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 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 (7)

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 → USGS hydrologic unit codes ⓘ
linked to: United States Geological Survey hydrologic unit codes
United States Geological Survey hydrologic unit codes → relatedTo → National Watershed Boundary Dataset ⓘ
linked to: United States Geological Survey hydrologic unit codes
Ohio River basin → hydrologicUnitCodeSystem → USGS HUC system ⓘ
linked to: United States Geological Survey hydrologic unit codes
Rio Grande basin → hydrologicUnitOf → United States hydrologic unit system ⓘ
linked to: United States Geological Survey hydrologic unit codes
HUC code → definedIn → USGS hydrologic unit system ⓘ
subject linked to: HUC codes
linked to: United States Geological Survey hydrologic unit codes
HUC code → linkedTo → Watershed Boundary Dataset ⓘ
subject linked to: HUC codes
linked to: United States Geological Survey hydrologic unit codes