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2003. U.S. Bureau of Reclamation, Mid-Pacific Region, MPGIS Service Center. Canal system center lines in the Central Valley of California and adjacent areas captured from 1:24,000-scale USGS topographic maps. Updates and mo...
2014. Kern County (Calif.) -- Engineering, Surveying and Permit Services . This polyline dataset shows all existing roadways within Kern County, California for 2014. Includes classifications for different road types.