TRUE 1.0 20220111 14002900 This data set is depicting areas within Maryland that are covered under under Phase I or Phase II NPDES permits regulating urban stormwater runoff. The polygons do not represent actual urban land use areas. They represent total land ownership associated with the permitted entities.The dataset is used in conjuntion with the USGS-CBP 2006 Chesapeake Bay land cover to determine the urban impervious and pervious acres associated with each entity in the CBP P5.3.2 watershed model tabular land use. The dataset is spatially accurate at the mapping scale of the least accurate source dataset. Raster data with a resolution of 30m x 30m was converted to polygons and also used in the source sector delineation, indicating that there could be mapping errors at a 900 square meter basis. The data is projected in the UTM Zone 18 N. MS4 Regulated Areas X-Ray NPDES NaN NaN NaN NaN OBJECTID OBJECTID OID 4 0 0 Internal feature number. Esri Sequential unique whole numbers that are automatically generated. SHAPE SHAPE Geometry 0 0 0 Feature geometry. Esri Coordinates defining the features. Acres Acres Double 8 0 0 Acres created_date Date created Date 8 0 0 Date created created_user Created by String 255 0 0 Created by last_edited_date Last edited date Date 8 0 0 Last edited date last_edited_user Last edited by String 255 0 0 Last edited by Name NPDES regulated stormwater entity String 50 0 0 Name of NPDES regulated stormwater entity REGSWTYPE REGSWTYPE String 50 0 0 REGSWTYPE source Source String 12 0 0 Internal feature number.