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1. 104 State Water Plan Watersheds: Pennsylvania

1998. Environmental Resources Research Institute. Digitized boundaries of 104 major watersheds defined in the Pennsylvania state water plan. The State Water Plan, originally developed in the 1970s,...

2. 10-Degree Graticule Grid, World, 1:110 million, 2012

2012. Patterson, Tom and Kelso, Nathaniel Vaughn. This line shapefile displays graticules (grid lines of latitude parallels and longitude meridians) for the world at 10 degree intervals. Graticules... North American Cartographic Information Society.

3. 1:1,000,000-Scale County Boundaries of the United States, 2014

2014. Geological Survey (U.S.). This polygon shapefile contains the county boundaries of the United States, Puerto Rico, and the U.S. Virgin Islands, by showing the counties as ar... Geological Survey (U.S.).

4. 1:1,000,000-Scale County Boundary Lines of the United States, 2014

2014. Geological Survey (U.S.). This polygon shapefile contains the county boundaries of the United States, Puerto Rico, and the U.S. Virgin Islands. This layer was derived from t... Geological Survey (U.S.).

5. 1:1,000,000-Scale National Boundaries of the United States, 2014

2014. Geological Survey (U.S.). This polygon shapefile contains the boundaries of the United States, Puerto Rico, and the U.S. Virgin Islands. The map layer was created by extract... Geological Survey (U.S.).

6. 1:1,000,000-Scale National Wilderness Preservation System of the United States, 2014

2014. National Atlas of the United States. This polygon shapefile consists of National Wilderness Preservation System areas of 320 acres or more, in the United States, Puerto Rico, and the U... National Atlas of the United States.

7. 1:1,000,000-Scale State Boundaries of the United States, 2012

2012. National Atlas of the United States. This polygon shapefile portrays the state boundaries of the United States, Puerto Rico, and the U.S. Virgin Islands. The map layer was created by e... National Atlas of the United States.

8. 1:1,000,000-Scale State Boundaries of the United States, 2014

2014. National Atlas of the United States. This polygon shapefile portrays the state boundaries of the United States, Puerto Rico, and the U.S. Virgin Islands. The map layer was created by e... National Atlas of the United States.

9. 1:24,000 County Boundaries (cnty24k09_1_line)

2009. California Department of Forestry and Fire Protection (using data from BOR, DFG, and DOC FMMP). In late 1996, the Dept of Conservation (DOC) surveyed state and federal agencies about the county boundary coverage they used. As a result, DOC ado... California. California Department Of Forestry and Fire Protection., California. California Department Of Fish and Game.

10. 1:24,000 County Boundaries (cnty24k09_1_multipart)

2009. California Department of Forestry and Fire Protection (using data from BOR, DFG and DOC FMMP). In late 1996, the Dept of Conservation (DOC) surveyed state and federal agencies about the county boundary coverage they used. As a result, DOC ado... California. California Department Of Forestry and Fire Protection., California. California Department Of Fish and Game.