Hydrologic Unit Codes (HUCs) are used to identify areas of land that
drain to a common outflow point (also known as watersheds). The US
Geological Survey uses a 6-level nested system of HUCs. This application
includes
HUC 12 subwatersheds that overlap with the Massachusetts-Rhode
Island Coastal Subregion.* The land cover data comes from the
Sentinel-2 global LULC map for the year 2023.
*This application was developed without a paid subscription to any ESRI services.
It only uses data published in the ArcGIS Living Atlas of the World and only
includes subwatersheds that do not
exceed the maximum area for requests set by the land cover service provider.