Information Center for the Environment

In cooperation with several federal and state agencies, the Information Center for the Environment (ICE) at the University of California Davis is analyzing the ability to cross-reference information linked to California's hydrography dataset (a modified form of the U.S. Environmental Protection Agency's River Reach File) to the new National Hydrography Dataset. California's Reach File contains a critical but non-standard foreign key that is essential to many research applications. Additionally, ICE plans to test, verify, and recommend enhancements to cross-referencing methods to improve the transfer of reach-code information from earlier hydrography datasets in California to the NHD.