Known Boundary Services

The Known Boundary services were designed 1) to retrieve a list of the names of common boundaries (watersheds and cities) that intersect an an area of interest and 2) to retrieve the geometry of a desired common boundary.

The HUC watershed services extract the various USGS Hydrologic Unit Codes (HUC) that vary in size from regions (HUC-2) to watersheds (HUC-8) to sub-watersheds (HUC-12) and below (HUC-14). The city services extract the various 'incorporated places' boundaries based on the 2010 U.S. Census.