The Pennsylvania State UniversityThe Erie PA Hydrology mapping will consist of the following: 1. Island - land areas within rivers and water bodies. 2. Marsh_Swamp - marshes, swamps and areas of intermittent water. 3. River_Poly - double line streams that are wider than 8 feet wide. 4. Streams - single line stream less than 8 feet wide. 5. Waterbody - a quarter acre ponds larger than 200 sq. ft. within 200 feet. of the bluff line and half an acre beyond 200 feet.FileengPennsylvania Spatial Data Access (PASDA)PublicErie PA Hydrology - Streams [Pennsylvania]DatasetsPennsylvania