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1. 100-Meter Resolution Impervious Surface of Puerto Rico and the U.S. Virgin Islands, 2001

2001. Geological Survey (U.S.). This raster layer is a georeferenced image containing impervious surface data for Puerto Rico and the Virgin Islands. Data are in an Albers Equal-A... Geological Survey (U.S.).

2. 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.

3. Bailey's Ecoregions and Subregions of the United States, 2004

2004. United States. Forest Service. This polygon shapefile is commonly called Bailey's ecoregions and shows ecosystems of regional extent in the United States, Puerto Rico, and the U.... National Atlas of the United States.

4. Classification of Forest Fragmentation in North America, 1992

1992. Ritters, Kurt. This raster layer is a grid map of North America including the Caribbean and most of Mexico in GeoTIFF format. The map layer is an excerpt from a g... National Atlas of the United States.

5. Fees and Easements, LCC 22, Protected Areas Database of the United States, 2005-2016

2005. Gap Analysis Program (U.S.). This polygon shapefile contains combined PAD-US Fee and Easements features for Landscape Conservation Cooperative (LCC) 22. The USGS Protected Area... Gap Analysis Program (U.S.).

6. Fees and Easements, Puerto Rico, Protected Areas Database of the United States, 2005-2016

2005. Gap Analysis Program (U.S.). This polygon shapefile contains combined PAD-US Fee and Easements features for Puerto Rico. The USGS Protected Areas Database of the United States ... Gap Analysis Program (U.S.).

7. Hazardous Waste, Generated, Shipped, Received 2001-2007

2001. National Atlas of the United States. This polygon shapefile portrays the hazardous waste generated, shipped, and received by state and other areas within the United States, Puerto Rico... National Atlas of the United States.

8. National Wilderness Preservation System of the United States, 2006

1972. National Atlas of the United States. This polygon shapefile contains National Wilderness Preservation System areas of 640 acres or more, in the United States, Puerto Rico, and the U.S.... National Atlas of the United States.

9. Nonattainment Areas for Carbon Monoxide Pollution: United States and Territories, 1971

1971. United States. Bureau of Transportation Statistics and Stackhouse, Cecil. This polygon shapefile depicts nonattainment and maintenance areas for the United States and its Territories for the enforcement of the carbon mono... United States. Bureau of Transportation Statistics.

10. Nonattainment Areas for Carbon Monoxide Pollution: United States and Territories, 1990

1990. United States. Bureau of Transportation Statistics and Stackhouse, Cecil. This polygon shapefile depicts nonattainment and maintenance areas for the United States and its Territories for the enforcement of the carbon mono... United States. Bureau of Transportation Statistics.