Description: These polygons represent full drainage basins based on the complete upstream navigation of the NHDPlus flowline network from the NRSA sample point. This data set was created for the purpose of calculating landscape metrics to assist with the NRSA reference condition assessment. Landscape metrics were requested for four spatial resolutions or "geometries" -- catchment (NHDCAT), 10km upstream-navigated subbasin (NHD10), 100km upstream-navigated subbasin (NHD100), and cumulative drainage basin (NHDWAT). All geometries were based on smoothed NHDPlus elevation-derived catchments.