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2000. North Fork Associates. This polygon shapefile depicts the distribution of extant vernal pool complexes in Placer Country for use by the United States Fish and Wildlife Se... California. Department of Fish and Game. Marine Resources Region.
2003. Placer County Geographic Information Systems. Land cover of west Placer County is a polygon feature describing vegetation, vernal pool complexes and urban areas. The data was created on behalf ... Placer County Geographic Information Systems.