The California Geological Survey produces several types of maps and publications, many of which are online. One of the products being offered by CGS is interactive mapping program created for the
Seismic Hazards Zonation Program. The Seismic Hazards Mapping Web Page uses Intergraph's GeoMedia WebMap to allow you to interactively view Seismic Hazards Mapping data using an internet browser. It also allows you to download maps and GIS data via the web. Read on for a comprehensive listing of CGS's Online Maps and Data.
The majority of CGS online maps and data are PDF files and require Acrobat Reader to view and download.
Educational Resources and General Interest
Hazards-Landslide and Erosion
Geologic Hazard Abatement Districts (article from CALIFORNIA GEOLOGY, July 1986); see also Public Resources Code sections regarding Geologic Hazard Abatement Districts
Guidelines for Geologic Reports for Timber Harvesting Plans (pdf)
Index to Published Landslide Maps, Northern California Coast Ranges (Special Publication 120; pdf)—Index includes maps published by USGS, CGS and others
Inventory of Significant 1998 California Landslides
List of Landslide Maps Available from CGS (List includes DCGS maps listed in SP 120 and more)
Timber Harvesting Plan THP Engineering Geologic Reviews
Watershed Maps of Northern California (download maps)
Watershed Mapping Series, Map Set 1, Map of Geologic and Geomorphic Features Related to Landsliding (west & east color), Noyo River Watershed, Mendocino County, California
Watershed Mapping Series, Map Set 2, Preliminary Map of Geologic and Geomorphic Features Related Landsliding, (color), Jackson Demonstration State Forest, Mendocino County, California
Watershed Mapping Series, Map Set 3, Digital Representation of OFR 99-10 and OFR 99-10a
Geologic and Geomorphic Features Related to Landsliding, (color), Freshwater Creek , Humboldt County, California