Creator
- United Nations Office for the Coordination of Human Affairs1
- United States Fish and Wildlife Service1
- United States Geological Survey1
- United States. Department of Commerce1
- United States. Environmental Protection Agency1
- United States. National Marine Fisheries Service1
- United States. National Ocean Service1
- United States. National Oceanic and Atmospheric Administration1
- Vestra Resources Inc. Redding, CA1
- World Resources Institute1
- Yolo County, Public Works Division, Planning Services 1
- compiled from US Geological Survey sources by Brian B. Quinn, Ph.D. GISP1