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91. Historical United States County Boundaries, 1970

1970. Earle, Carville, Heppen, John, Louisiana State University (Baton Rouge, La.). Department of Geography and Anthropology., Otterstrom, Samuel, and Cao, Changyong. This polygon shapefile contains county boundaries for the United States in 1970. Attributes include county and state names as well as FIPS identifi... Geoscience Publications.

92. Historical United States County Boundaries, 1980

1980. Earle, Carville, Heppen, John, Louisiana State University (Baton Rouge, La.). Department of Geography and Anthropology., Otterstrom, Samuel, and Cao, Changyong. This polygon shapefile contains county boundaries for the United States in 1980. Attributes include county and state names as well as FIPS identifi... Geoscience Publications.

93. Historical United States County Boundaries, 1990

1990. Earle, Carville, Heppen, John, Louisiana State University (Baton Rouge, La.). Department of Geography and Anthropology., Otterstrom, Samuel, and Cao, Changyong. This polygon shapefile contains county boundaries for the United States in 1990. Attributes include county and state names as well as FIPS identifi... Geoscience Publications.

94. Hydrologic Sub Area Watersheds: San Francisco Bay Area, California, 2009

2009. Bay Area Open Space Council, Conservation Lands Network, San Francisco Bay Area Upland Habitat Goals Project, and GreenInfo Network (Firm). This polygon shapefile depicts a dissolve that was run on the Hydrologic Sub Areas for the nine county San Francisco Bay Area Region, California. H... Bay Area Open Space Council.

95. Impervious Surfaces: San Francisco Bay Area, California, 2009

Bay Area Open Space Council, Conservation Lands Network, GreenInfo Network (Firm), and San Francisco Bay Area Upland Habitat Goals Project. The National Land Cover Database 2001 (NLCD) for mapping zone 03 was produced through a cooperative project conducted by the Multi-Resolution Land ... Bay Area Open Space Council.

96. Inland Trawl Blocks: California, 2006

2006. King, Howatt P. and Wade, Gina. For decades, California fishery reporting and management has been organized and documented using a 10 minute latitude-longitude (10 minute) grid, k... California. Department of Fish and Game. Marine Resources Region.

97. Intermediate Discharges into Near Coastal Marine Waters: Southern California, 2003

2003. California. Department of Fish and Game. Marine Resources Region. This polygon shapefile depicts intermediate discharges into Southern California's near-coastal marine waters, but does not include discharges into ... California. Department of Fish and Game. Marine Resources Region.

98. Islands and Rocks: California Coastal National Monument, 1998

1998. California. Department of Fish and Game. Marine Resources Region. This polygon shapefile represents offshore rocks and islands that are part of the newly designated California Coastal National Monument (CCNM), und... California. Department of Fish and Game. Marine Resources Region.

99. Juvenile Distribution: California Sheephead, California, 2001

2001. California. Department of Fish and Game. Marine Resources Region. This polygon shapefile depicts distribution for juvenile California Sheephead (Semicossyphus pulcher). The process of creating this shapefile inclu... California. Department of Fish and Game. Marine Resources Region.

100. Juvenile Distribution: Copper Rockfish, California, 2001

2001. California. Department of Fish and Game. Marine Resources Region. This shapefile depicts distribution for juvenile Copper Rockfish (Sebastes caurinus). The process of creating this shapefile included creating cont... California. Department of Fish and Game. Marine Resources Region.