20200611 19565000 1.0 TRUE cultural_basemap Map layer of California's indigenous cultural regions. Click on the land for Tribal information and exhibits! Source: Native American Heritage Commission, California. 2015 Directory of Tribal Governments. (NAHC2015) 10 km buffers added to source map to reflect uncertainty of historical boundaries. For more information see: nahc.ca.gov/cp/references/ See nahc.ca.gov/cp/references/