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1. 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.

2. Abundance Estimates of the Pacific Salmon Conservation Assessment Database, 1978-2008

1978. Pinsky, Malin L., Springmeyer, Dane B., Goslin, Matthew N., and Augerot, Xanthippe. This dataset is a visualization of abundance estimates for six species of Pacific salmon (Oncorhynchus spp.): Chinook, Chum, Pink, Steelhead, Socke... Stanford Digital Repository.

3. 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.

4. Agricultural Preserves: Santa Clara County, California, 2015

2015. Santa Clara County (Calif.). Planning Office. This polygon shapefile depicts 10 agricultural preserves located in unincorporated areas of the County of Santa Clara, California. According to Cal... Santa Clara County (Calif.). Planning Office.

5. Air Pollution Control District, Monterey County, California, 2015

2015. Monterey County (Calif.). This polygon shapefile represents the boundary of the Air Pollution Control District within Monterey County, California. This layer is part of a co... Monterey County (Calif.).

6. Anadromous Stream Restoration Projects (Polygons): Russian River, California, 1981-2002

1981. Circuit Rider Productions. This polygon shapefile includes habitat improvement projects, research projects (surveys and studies of streams, roads, watersheds), education proj... Circuit Rider Productions.

7. Anchorages, Northeast United States, 2013

2013. Baldwin Group. This polygon shapefile represents anchorages in the Northeastern United States. The areas described are designated as special anchorage areas for p... Coastal Services Center (U.S.).

8. Annual Growth of Biomass for Vegetation Outside of Croplands: Kenya, 2002

2002. This polygon shapefile depicts the annual growth of biomass outside of croplands as well as the theoretically harvestable biomass yield outside of ... World Resources Institute.

9. 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.

10. Aquaculture, Northeast United States, 2014

2013. SeaPlan. This polygon shapefile represents aquaculture regions in the northeastern United States. Aquaculture in the northeast region is a diverse, vibrant ... Northeast Ocean Data.

11. Archaeological Sensitivity, Monterey County, California, 2015

2015. Monterey County (Calif.). This polygon shapefile contains areas of archaeological sensitivity within Monterey County, California. Archaeological sensitivity zones are those ... Monterey County (Calif.).

12. Area Boundaries of the Armstrong Redwoods State Reserve Habitat Assessment, California, 1997-1998

1997. Circuit Rider Productions. This polygon shapefile represents the boundaries of the 1997-1998 Armstrong Redwoods State Reserve Habitat Assessment created by Circuit Rider Prod... Circuit Rider Productions.

13. Average Annual Precipitation Zones: Russian River Basin, California, 1900-1960

1900. Circuit Rider Productions. This poygon shapefile represents Isohyetal lines of equal average rainfall for the Russian River basin in California. These data were derived from ... Circuit Rider Productions.

14. Average Water Consumption by Livestock and Wildlife by Subdrainage Area, Kenya, 1994-1996

1994. World Resources Institute. This polygon shapefile represents the average water consumption of livestock and wildlife by sub-basin in Kenya for 1994-96. The greatest water dem... World Resources Institute.

15. 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.

16. Baylands Boundary: San Francisco Bay Area, California, 1999

1999. Bay Area Open Space Council, Conservation Lands Network, San Francisco Bay Area Upland Habitat Goals Project, and GreenInfo Network (Firm). This polygon shapefile represents the edge of the baylands boundary, as published in the San Francisco Estuary Institute's Eco Atlas released in 19... Bay Area Open Space Council.

17. Biologic Resource Areas: Humboldt County, California, 2015

2015. von Dohlen, Jerry. This polygon shapefile depicts boundaries for Biologic Resource Areas in the County of Humboldt, California. Biologic Resources are designated due ... Humboldt County Planning and Building Department.

18. Biomass Resource Potential in the United States, Fall 2014

2015. Hart Energy Publishing. This polygon dataset contains estimates of biomass resource potential for the lower 48 states of the United States. The following feedstock categor... Hart Energy Publishing.

19. Biomass Resource Potential in the United States, Spring 2013

2013. Hart Energy Publishing. This polygon dataset contains estimates of biomass resource potential for the lower 48 states of the United States. The following feedstock categor... Hart Energy Publishing.

20. Biomass Resource Potential in the United States, Summer 2014

2014. Hart Energy Publishing. This polygon dataset contains estimates of biomass resource potential for the lower 48 states of the United States. The following feedstock categor... Hart Energy Publishing.