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9 datasets

CGS Mineral Hazards: Indoor Radon Potential Zones

  • Published by: California Department of Conservation
  • Last updated: Wednesday, July 30, 2025
  • File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML

This digital layer contains polygons (vector format) of portions of California designated as having high, moderate, low, or unknown potential for home...

CGS Mineral Hazards: Indoor Radon Potential Study Areas

  • Published by: California Department of Conservation
  • Last updated: Wednesday, July 30, 2025
  • File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML

Study area boundaries for indoor radon potential conducted by the California Geological Survey....

CGS Information Warehouse: Regulatory Maps

  • Published by: California Department of Conservation
  • Last updated: Wednesday, July 30, 2025
  • File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML, TXT, XLSX, GPKG, GDB

Alquist-Priolo Earthquake Fault Zoning Act (1972) and the Seismic Hazards Mapping Act (1990) direct the State Geologist to delineate regulatory "...

CGS Information Warehouse: Tsunami Inundation Maps

  • Published by: California Department of Conservation
  • Last updated: Wednesday, July 30, 2025
  • File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML

Produced collectively by tsunami modelers, geologic hazard mapping specialists, and emergency planning scientists from the University of Southern Cali...

CGS Map Sheet 58: Deep-Seated Landslide Susceptibility

  • Published by: California Department of Conservation
  • Last updated: Wednesday, July 30, 2025
  • File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML

The Susceptibility to Deep-Seated Landslides map covers the entire state of California and was originally published in May of 2011 as CGS Map Sheet 58...

CGS Information Warehouse: Landslide Maps and Reports

  • Published by: California Department of Conservation
  • Last updated: Wednesday, July 30, 2025
  • File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML

Since the 1960's, the California Geological Survey (CGS) has produced numerous maps that show landslide features and delineate potential slope-stabili...

Fault Activity Map of California (2010)

  • Published by: California Department of Conservation
  • Last updated: Wednesday, July 30, 2025
  • File types: HTML, ARCGIS GEOSERVICES REST API

"This digital database contains the faults shown on the Fault Activity Map of California by Charles W. Jennings and William A. Bryant published i...

CGS Information Warehouse: Mineral Land Classification Maps (SMARA Study Areas)

  • Published by: California Department of Conservation
  • Last updated: Wednesday, July 30, 2025
  • File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML

Mineral Land Classification studies are produced by the State Geologist as specified by the Surface Mining and Reclamation Act (SMARA, PRC 2710 et seq...

CGS Information Warehouse: Mineral Land Classification Maps (SMARA Petitions)

  • Published by: California Department of Conservation
  • Last updated: Wednesday, July 30, 2025
  • File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML

Mineral Land Classification studies are produced by the State Geologist as specified by the Surface Mining and Reclamation Act (SMARA, PRC 2710 et seq...

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