Big Ten Academic Alliance Geospatial Discovery Portal

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1. 7.5 minute Digital Raster Graphics for Pennsylvania- Albers - cropped collars: Pennsylvania, 1996

1996. U.S. Geological Survey. A Digital Raster Graphic (DRG) is a raster image of a scanned USGS topographic or planimetric map with cropped collars in Albers projection.

2. Allegheny County - Blocks: Pennsylvania, 2002

2002. Allegheny County Division of Computer Services Geographic Information Systems Group. Derived from original MAPINDX: Map Index Sheets from Block and Lot Grid of Property Assessment and based on aerial photography, showing 1983 datum ...

3. Allegheny County - Contours: Pennsylvania, 2006

2006. Allegheny County Division of Computer Services Geographic Information Systems Group. Contour data was created as a result of a county flyover in the spring of 2004. Contours were created from a DTM Feature Dataset, upgraded by Baker...

4. Allegheny County - Slopes: Pennsylvania, 2010

2010. Allegheny Places Design Team. Slope data.

5. Allegheny County - Spot Elevation: Pennsylvania, 2006

2006. Allegheny County Division of Computer Services Geographic Information Systems Group. Spot Elevation data was created as a result of a county flyover in the spring of 2004. They were created from a DTM Feature Dataset, upgraded by Ba...

6. Allegheny County - Urban Tree Canopy: Pennsylvania, 2010

2010. University of Vermont Spatial Analysis Laboratory and Allegheny County Division of Computer Services Geographic Information Systems Group. Allegheny County Urban Tree Canopy. High resolution land cover dataset for Allegheny County, Pennsylvania.

7. Allegheny County Imagery 2010 - Tile Index: Pennsylvania, 2010

2010. Allegheny County Division of Computer Services Geographic Information Systems Group. TILE INDEX - Orthophotos of Allegheny County, Pennsylvania - An orthoimage is remotely sensed image data that has been positionally corrected for c...

8. Allegheny County Imagery 2013 - Tile Index: Pennsylvania, 2013

2013. Allegheny County Division of Computer Services Geographic Information Systems Group. Tile Index - Orthophotos of Allegheny County, Pennsylvania - An orthoimage is remotely sensed image data that has been positionally corrected for c...

9. Bird Areas - High Allegheny Plateau Ecoregion: Pennsylvania, 2010

2010. Natural Lands Trust. This raster dataset has been created using the NImportant Bird AreasN as originated by the Pennsylvania Audubon Society. All areas designated as co...

10. Chesapeake Bay Watershed Land Cover Data Series 1984: Chesapeake Bay, 1984

1983. U.S. Geological Survey. To better understand how the land is changing and to relate those changes to water quality trends, the USGS funded the production of a Chesapeake B...

11. Chesapeake Bay Watershed Land Cover Data Series 1992: Chesapeake Bay, 1992

1992. U.S. Geological Survey. To better understand how the land is changing and to relate those changes to water quality trends, the USGS funded the production of a Chesapeake B...

12. Chesapeake Bay Watershed Land Cover Data Series 2001: Chesapeake Bay, 2001

2001. U.S. Geological Survey. To better understand how the land is changing and to relate those changes to water quality trends, the USGS funded the production of a Chesapeake B...

13. Chesapeake Bay Watershed Land Cover Data Series 2006: Chesapeake Bay, 2006

2006. U.S. Geological Survey. To better understand how the land is changing and to relate those changes to water quality trends, the USGS funded the production of a Chesapeake B...

14. Delaware Water Gap Color Infra-Red Photos: Delaware River Basin, 2000

2000. US Geological Survey (USGS). arieal photography of the Delaware Water Gap including the surrounding watersheds and tributaries.

15. DEM Mosaics by Lidar Delivery Zones: Pennsylvania, 2006-2008

2012. The Pennsylvania State University. Mosaics of PAMAP DEMs by PAMAP Lidar Delivery Zones - This dataset, produced by the PAMAP Program, consists of a raster digital elevation model wit...

16. Digital Orthophoto (DOQQ - quarter-quadrangle) images for Pennsylvania: Pennsylvania, 1999

1999. U.S. Geologic Survey; Pennsylvania Bureau of Topographic and Geologic Survey. Orthophotos combine the image characteristics of a photograph with the geometric qualities of a map. The primary digital orthophotoquad (DOQ) is a ...

17. DVRPC 2005 Digital Orthoimagery for Southeast Pennsylvania - Tile Index: Pennsylvania, 2005

2005. Delaware Valley Regional Planning Commission. TILE INDEX - An orthoimage is remotely sensed image data in which displacement of features in the image caused by terrain relief and sensor orienta...

18. DVRPC 2010 Digital Orthoimagery - County Mosaics Southeast, Pennsylvania: Delaware Valley, 2010

2010. Delaware Valley Regional Planning Commission. DVRPC Mr.SID County Mosaics for (Bucks, Chester, Delaware, Montgomery, Philadelphia counties) - An orthoimage is remotely sensed image data in whic...

19. DVRPC 2010 Digital Orthoimagery for Southeast Pennsylvania - Tile Index: Delaware Valley, 2010

2010. Delaware Valley Regional Planning Commission. This index represents the coverage of DVRPC's orthoimagery for the years 2000, 2005, and 2010 in the 5-county, Pennsylvania portion of the DVRPC re...

20. DVRPC 2010 Digital Orthoimagery for Southeast Pennsylvania: Pennsylvania, 2010

2010. Delaware Valley Regional Planning Commission. DVRPC TIFF Tiles - An orthoimage is remotely sensed image data in which displacement of features in the image caused by terrain relief and sensor o...