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1. Administrative Boundaries of National Park System Units, 2011

2011. United States. Bureau of Transportation Statistics. This polygon shapefile depicts service wide boundary set for display and general analysis purposes. This layer is part of the 2014 National Transpo... United States. Bureau of Transportation Statistics.

2. Administrative County Boundaries: United States and Territories, 2011

2011. United States. Bureau of the Census. Geography Division and United States. Bureau of Transportation Statistics. This polygon shapefile contains United States administrative county boundaries extracted from the U.S. Census Bureau's MAF/TIGER Database (MTDB). T... United States. Bureau of Transportation Statistics.

3. Administrative Division Lines, Latvia, 2011

2011. International Steering Committee for Global Mapping and Latvian Geospatial Information Agency. This point shapefile represents administrative divisions lines in Latvia. The Global Map Latvia - Boundaries layer accuracy corresponds to scale 1:... International Steering Committee for Global Mapping.

4. Administrative Divisions, Latvia, 2011

2011. International Steering Committee for Global Mapping and Latvian Geospatial Information Agency. This point shapefile represents administrative divisions of Latvia. The Global Map Latvia - Boundaries layer accuracy corresponds to scale 1:500 00... International Steering Committee for Global Mapping.

5. Airport Runways, California, 2011

2011. California. Department of Transportation. Aeronautics Program. This line shapefile represents airport runways in California. These are runways for which the Department of Transportation (Caltrans) HQ Aeronautic... California. Department of Transportation.

6. Airport Runways: United States and Territories, 2011

2011. United States. Bureau of Transportation Statistics and United States. Federal Aviation Administration. The Airport Runways database is a geographic dataset of runways in the United States and its Territories containing information on the physical cha... United States. Bureau of Transportation Statistics.

7. Airports, Latvia, 2011

2011. International Steering Committee for Global Mapping and Latvian Geospatial Information Agency. This point shapefile represents airports in Latvia. The Global Map Latvia - Boundaries layer accuracy corresponds to scale 1:500 000. Boundaries la... International Steering Committee for Global Mapping.

8. Airports: United States and Territories, 2011

2011. United States. Bureau of Transportation Statistics and United States. Federal Aviation Administration. This point shapefile depicts aircraft landing facilities in the United States and United States Territories. Attribute data is provided on the phys... United States. Bureau of Transportation Statistics.

9. Amphibian and Reptile Specimen Provenances: San Francisco Bay Area, California, 2011

2011. Bay Area Open Space Council, Conservation Lands Network, San Francisco Bay Area Upland Habitat Goals Project, and GreenInfo Network (Firm). The University of California, Berkeley Museum of Vertebrate Zoology (MVZ) collection of amphibians and reptiles contains over 265,000 catalogued sp... Bay Area Open Space Council.

10. Annual Particulate Matter (Annual PM-2.5) Non-Attainment Designations in Region 9, 2011

2011. United States. Environmental Protection Agency, Region IX. This polygon shapefile contains designated areas for particulate matter < 2.5 microns, according to the annual National Ambient Air Quality Stan... United States. Environmental Protection Agency, Region IX.