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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.
2012. Patterson, Tom and Kelso, Nathaniel Vaughn. This polygon shapefile depicts year-round ice shelves in Antarctica. Data was derived from the MODIS 2003-2004 Mosaic of Antarctica, but reflects m... North American Cartographic Information Society.
2012. Patterson, Tom and Kelso, Nathaniel Vaughn. This polygon shapefile depicts the edges of year-round ice shelves fringing Antarctica. Data was generalized from 10m Antarctic ice shelves derived... North American Cartographic Information Society.
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.
2015. Sacramento County GIS. This polygon shapefile depicts boundaries of bodies of water in the County of Sacramento, California, including canals, dams, the Delta, ponds, res... Sacramento County GIS.
2011. Bay Area Open Space Council, Conservation Lands Network, San Francisco Bay Area Upland Habitat Goals Project, and GreenInfo Network (Firm). This polygon shapefile depicts bodies of water in the nine county San Francisco Bay Area Region, California, onto which other thematic data can be ... Bay Area Open Space Council.
2015. Santa Clara Valley Water District (Calif.). This polygon shapefile depicts boundaries of Bodies of Water in the County of Santa Clara, California, including reservoirs, lakes, percolation pon... Santa Clara Valley Water District (Calif.).
2000. California. Division of Mines and Geology. This polygon shapefile displays the boundaries of the Noyo River Watershed, which lies within the Coast Ranges physiographic province of California... California. Division of Mines and Geology.
2011. Bay Area Open Space Council, GreenInfo Network (Firm), Conservation Lands Network, and San Francisco Bay Area Upland Habitat Goals Project. This polygon shapefile depicts the boundary of the San Francisco Bay in California, including San Pablo Bay and the Carquinez Straight, onto which ... Bay Area Open Space Council.
2003. California. Department of Water Resources. The polygon shapefile contains the boundaries of 515 groundwater basins and subbasins as defined by the California Department of Water Resources (B... California. Department of Water Resources.