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1. Basins: Allegheny County, Pennsylvania

2002. Allegheny County Division of Computer Services Geographic Information Systems Group. 3 Rivers Wet Weather Demonstration Program Outreach Planning Basins.

2. Berea Sandstone Assessment Unit - National Assessment of Oil and Gas Project - Appalachian Basin Province (067) Assessment Units: Pennsylvania

2002. United States Geological Survey (USGS). The Assessment Unit is the fundamental unit used in the National Assessment Project for the assessment of undiscovered oil and gas resources. The A...

3. Berea Sandstone Quarter Mile Cells - National Assessment of Oil and Gas Project - Appalachian Basin (067) Quarter-Mile Cells: Pennsylvania

2002. United States Geological Survey (USGS). Cell maps for each oil and gas assessment unit were created by the USGS as a method for illustrating the degree of exploration, type of production,...

4. Blocks: Allegheny County, Pennsylvania

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 ...

5. Catskill Sandstones Siltstones Assessment Unit - National Assessment of Oil and Gas Project - Appalachian Basin Province (067) Assessment Units

2002. United States Geological Survey (USGS). The Assessment Unit is the fundamental unit used in the National Assessment Project for the assessment of undiscovered oil and gas resources. The A...

6. Catskill Sandstones Siltstones Assessment Unit Quarter Mile Cells - National Assessment of Oil and Gas Project - Appalachian Basin (067) Quarter-Mile Cells

2002. United States Geological Survey (USGS). Cell maps for each oil and gas assessment unit were created by the USGS as a method for illustrating the degree of exploration, type of production,...

7. Cemeteries: Allegheny County, Pennsylvania

2002. Allegheny County Division of Computer Services Geographic Information Systems Group. Outlines of public and private cemeteries greater than one acre in size. Areas were delineated following a generalized line along the outside edge ...

8. Cropland Data Layer (CDL) - raster 1:100,000: Maryland

2002. United States Department of Agriculture (USDA), National Agricultural Statistics Service (NASS), Research and Development Division, Geospatial Information Branch, Spatial Analysis Research Section (SARS). The USDA-NASS 2002 Maryland Cropland Data Layer (CDL) is a raster, geo-referenced, categorized land cover data layer produced using satellite image...

9. Cropland Data Layer (CDL) - raster 1:100,000: New Jersey

2002. United States Department of Agriculture (USDA), National Agricultural Statistics Service (NASS), Research and Development Division, Geospatial Information Branch, Spatial Analysis Research Section (SARS). The USDA-NASS 2002 New Jersey Cropland Data Layer (CDL) is a raster, geo-referenced, categorized land cover data layer produced using satellite ima...

10. Cropland Data Layer (CDL) - raster 1:100,000: New York

2002. United States Department of Agriculture (USDA), National Agricultural Statistics Service (NASS), Research and Development Division, Geospatial Information Branch, Spatial Analysis Research Section (SARS). The USDA-NASS 2002 New York Cropland Data Layer (CDL) is a raster, geo-referenced, categorized land cover data layer produced using satellite image...