State of California Open Data
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3 datasets

CGS Information Warehouse: Regulatory Maps

  • Published by: California Department of Conservation
  • Last updated: Friday, April 4, 2025
  • File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML

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

Earthquake Zones of Required Investigation

  • Published by: California Department of Conservation
  • Last updated: Saturday, April 5, 2025
  • File types: HTML, ARCGIS GEOSERVICES REST API

The California Earthquake Hazards Zone Application ("EQ Zapp") is an onlin​e map that allows anyone with a computer, tablet or smartphone to...

Geologic Map of California (2010)

  • Published by: California Department of Conservation
  • Last updated: Friday, April 4, 2025
  • File types: HTML, ARCGIS GEOSERVICES REST API

This edition of the Geologic Map of California was prepared in recognition of the California Geological Survey's 150th Anniversary. It is an all-digit...

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