On February 12, 2026, the CGIA Community Forum event focused on the Development of Statewide Elevation-Derived Hydrography Data for California: A Federal-State-Regional-Local-Public-Private Community Effort. CGIA is pleased to share with the California GIS Community the notes, slides, and recording of the presentations. We thank all who presented, who attended the live stream, and who are visiting this website.
Questions about the 3D Hydrography for California program may be directed to nhd_stewardship@water.ca.gov.
(Click on the bolded text below to open each linked file.)
Link to the recording posted on YouTube https://youtu.be/kaUkzeQ_b1Y?si=K1HIJ7bVy-XohcVs
Hydrography Data Stewardship for California - Jane Schafer-Kramer, Lead Hydrography Data Steward, CA Department of Water Resources
Map showing locations of California 3D Hydrography Program projects in progress, proposed, and in planning
US Geological Survey’s Role in the National Hydrography Dataset and the 3D Hydrography Program -Cynthia Ritmiller, USGS National Map Liaison for CA, HI, AZ, CO, NM, NV, UT
What’s So Special About 3D Hydrography Program Data? - David Blodgett, USGS Hydro Informatics Specialist, Acting Chief of the Geo-Intelligence Branch
Additional 3DHP Resources shared by Dave Blodgett
The Role of CSU Chico and CSU Northridge in 3D Hydrography Data Development for CA - Erik Fintel, Project Manager, North State Planning and Development Collective, CSU Chico, and Joel Osuna-Williams, Project Manager, Center for Geospatial Science and Technology, CSU Northridge
Building a Regional Collaborative for 3DHP Data Acquisition - Colleen McNally-Murphy, Project Manager, San Mateo Resource Conservation District and the Santa Cruz Mountain Stewardship Network