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1. National Hydrography Dataset (NHD) Reach: Pennsylvania

2004. USGS. A compilation of all medium resolution reach layers from National Hydrography Datasets in or adjacent to Pennsylvania.

2. New Jersey (Land Use Land Cover, 1998)

USGS, New Jersey. Department of Environmental Protection, and Markhurd Corp. This data was created by combining two separate data sets, the land use/land cover layer from the Integrated Terrain Unit Maps (ITUM) for this coun... USGS.

3. Russia/Alaska (Mineral Deposits, 2003)

USGS. Mineral deposit and metallogenic belt mapsof the Russian Far East, Alaska,and the Canadian Cordillera, from the USGS Global GIS dataset. U.S. Geological Survey (USGS).

4. World (Geological Ages, 2003)

USGS and United States Geological Survey (USGS)Date: June 29, 1999Title Geologic Map (geo_join). Geologic ages of various parts of the world from the USGS Global GIS dataset.The World Energy Assessment created geologic maps of 7 regions. These ... U.S. Geological Survey (USGS).

5. World (Geological Faults, 2003)

USGS. Geological faults from the USGS Global GIS dataset.The fault maps in this atlas show the relatively large faults that reveal the geological structu... U.S. Geological Survey (USGS).

6. WPC HUC12 (includes percentage land-use): Western Pennsylvania

2004. USGS. 12 digit USGS hydrological unit code (HUC) watersheds within Pennsylvania. Includes percentage land-use information from the National Land Cover Da...