United States Geological Survey hydrologic unit codes
E242036
UNEXPLORED
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.
Referenced by (1)
| Subject (surface form when different) | Predicate |
|---|---|
|
Mississippi River basin
→
|
hydrologicCodeSystem |