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Major Watersheds - Regional
Polygon feature class representing major watersheds in Philadelphia. Data was developed originally from either USGS and the 2004 Sanborn DEM (digital elevation model) using... -
Major Watersheds - Philadelphia
Polygon feature class representing major watersheds in Philadelphia. Data was developed originally from either USGS and the 2004 Sanborn DEM (digital elevation model) using... -
Combined Sewer Service Area
This layer is dissolved and queried from PWD's internal sewer shed feature class named modelsheds. The polygons in this layer are catchments for sanitary, storm and/or combined... -
Impervious Surfaces
This is one of the planimetric coverages developed as part of the aerial survey project of 1996 and updated using new aerial photography collected between 25 March 2004 and 23... -
Hydrology
Locations of surface water features (rivers, creeks, ponds, reservoirs) and water beneath city bridges and adjacent to city borders. Separate files are available for each...
