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.
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2006. Ocean Data and Information Network for Africa. This point shapefile contains distribution data for Amphipoda in Africa. Data were derived from the Coastal & Oceanic Plankton Ecology, Product... Ocean Data and Information Network for Africa.
2006. Ocean Data and Information Network for Africa. This point shapefile contains distribution data for Annelida in Africa. Data were derived from the Coastal & Oceanic Plankton Ecology, Prod... Ocean Data and Information Network for Africa.
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.
2002. Lannoo, Michael J., Blackburn, Laura, and Nanjappa, Priya. This polygon shapefile portrays the distribution of 10 selected amphibians in the United States, based on historical literature and museum records ... National Atlas of the United States.
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.
2003. United States. Environmental Protection Agency. This polygon shapefile shows Omernik's Level III ecoregions, derived from a 1:7,500,000 map created by J.M. Omernik in 1987 and from refinements of... National Atlas of the United States.
2013. California. Department of Fish and Game. Marine Resources Region. This point shapefile depicts a compilation of marine mammal haul out features used in three Marine Life Protection Act study regions: north central... California. Department of Fish and Game. Marine Resources Region.
2006. United States. Agricultural Research Service. This polygon shapefile portrays the spread, by year, of the Africanized honey bee (AHB) in the United States, Puerto Rico, and the U.S. Virgin Isla... National Atlas of the United States.
2001. World Wildlife Fund. World Wildlife Fund Marine Ecoregions represents global marine ecoregions. Ecoregions are defined as relatively large areas of land or water in the... Esri.