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It was also used to create the Maryland Sub-Watershed file. The Prince George's County Planning Department does not have the authority to release this data. Please contact the authoritative source for more information and to acquire the data.", "geometryType": "esriGeometryPolygon", "sourceSpatialReference": { "wkid": 103069, "latestWkid": 6488, "xyTolerance": 0.00328083333333333, "zTolerance": 0.001, "mTolerance": 0.001, "falseX": -120561100, "falseY": -95444400, "xyUnits": 3048.0060960121905, "falseZ": 0, "zUnits": 1, "falseM": 0, "mUnits": 1 }, "copyrightText": "The original eight digit watershed file was created in 1991 from Maryland Department of the Environment (MDE) hardcopy watershed maps. The Maryland Office of Planning (OP) created that digital file by contracting with Daft, McCune and Walker to digitize third order stream watersheds. The U.S. Natural Resources Conservation Service (NRCS) produced the Hydrological Unit Code watershed file HUA14 using the OP file as a base map and redefining watersheds. NCRS field offices verified the watershed boundaries. The Maryland Department of Housing and Community Development Maryland Historic Trust (MHT) provided scanned US Geological Survey (USGS) 7.5 minute quadrangle map sheets to be used as a base map for corrections. The Department of Natural Resources (DNR) corrected the watershed boundaries to the scanned USGS 7.5 minute quadrangle map sheets in cooperation with NRCS. The State political boundary file from Maryland State Highway Administration's (SHA) GRID map series was merged into the file replacing the existing state line. 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