Big Ten Academic Alliance Geospatial Discovery Portal

Big Ten Academic Alliance Geoportal

Impervious Cover year 2000: Pennsylvania

This raster dataset has been created using the attribute field 'Value' from the 'Impervious Surface Area for Southeast Pennsylvania, 2000' data as originated by Toby Carlson, Penn State University (see metadata entitled 'pa2000isaa_se.htm'). The average of impervious surface was then calculated for the small watersheds (see metadata entitled 'smallsheds.xml'). Conservation Values were assigned based on the average impervious surface as follows: Avg. Impervious Surface Value 0-6 10 7-7 9 8-8 8 9-9 7 10-10 6 11-12 5 13-14 4 15-16 3 17-18 2 19-20 1 21-100 0 Conservation values were determined by experts gathered by Natural Lands Trust through SmartConservation. This data set is one of several that have been combined to create an overall aquatic resources conservation value raster for the expanded piedmont ecoregion. Therefore the values were determined as a relative rank, comparable in value only to the other input aquatic resources data. Conservation value ranges from 1 - 10 with 10 being the highest value.
Pennsylvania Spatial Data Access (PASDA)
Pennsylvania, United States
Imagery and Base Maps and Environment
Contributed by:
Penn State
More details at