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  1. California Open Data

    CalHeatScore Live Data for API Use

    California Office of Environmental Health Hazard AssessmentUpdated 14 Nov 2026

    CalHeatScore is a heat-health ranking system that translates 7-day weather forecasts into easy-to-understand heat scores ranging from 0-4 to indicate increasing levels of health risks due to extreme heat at the zip code level. This layer co …

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    • ARCGIS GEOSERVICES REST API
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    • +4
  2. California Open Data

    Power Outages by County

    California Office of Emergency ServicesUpdated 14 Nov 2026

    The power outages in this layer are pulled directly from the utility public power outage maps and is automatically updated every 15 minutes. This dataset represents only the most recent power outages and does not contain any historical data …

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  3. California Open Data

    Power Outage Areas

    California Office of Emergency ServicesUpdated 14 Nov 2026

    The power outages in this layer are pulled directly from the utility public power outage maps and is automatically updated every 15 minutes. This dataset represents only the most recent power outages and does not contain any historical data …

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    • ARCGIS GEOSERVICES REST API
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  4. California Open Data

    Power Outage Incidents

    California Office of Emergency ServicesUpdated 14 Nov 2026

    The power outages in this layer are pulled directly from the utility public power outage maps and is automatically updated every 15 minutes. This dataset represents only the most recent power outages and does not contain any historical data …

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    • ARCGIS GEOSERVICES REST API
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  5. California Open Data

    State Highway Network Postmiles

    CaltransUpdated 14 Nov 2026

    StateHighways are state highways based upon the Caltrans Linear Referencing System. Each record in this layer represents a highway segment where the county, route, postmile prefix, and postmile suffix are the same. Each segment has a begin …

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  6. California Open Data

    BOE CityAnx2027

    California Department of Tax and Fee AdministrationUpdated 14 Nov 2026

    This map includes change areas for city and county boundaries filed in accordance with Government Code 54900. The initial dataset was first published on October 20, 2021, and was based on the State Board of Equalization's tax rate area boun …

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    • ARCGIS GEOSERVICES REST API
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    • ZIP
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    • KML
    • +4
  7. California Open Data

    BOE CityCounty

    California Department of Tax and Fee AdministrationUpdated 14 Nov 2026

    This map includes change areas for city and county boundaries filed in accordance with Government Code 54900. The initial dataset was first published on October 20, 2021, and was based on the State Board of Equalization's tax rate area boun …

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    • ARCGIS GEOSERVICES REST API
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    • +4
  8. California Open Data

    City and County Boundary Line Changes

    California Department of Tax and Fee AdministrationUpdated 14 Nov 2026

    This map includes change areas for city and county boundaries filed in accordance with Government Code 54900. The initial dataset was first published on October 20, 2021, and was based on the State Board of Equalization's tax rate area boun …

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    • ARCGIS GEOSERVICES REST API
  9. California Open Data

    Surface Water - Freshwater Harmful Algal Blooms

    California State Water Resources Control BoardUpdated 14 Nov 2026

    Freshwater harmful algal bloom (HAB) data are sourced from the Freshwater Harmful Algal Bloom (FHAB) data system. The FHAB data system is the California State Water Resources Control Board’s platform for data and information voluntarily rep …

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  10. California Open Data

    Tree Characteristics - Spears and Didion Ranches [ds320]

    California Department of Fish and WildlifeUpdated 14 Nov 2026

    4" dbh and within the 12.6 m radius plot. If a plot number is missing, then there were no trees at the sample points and vegetation plots.

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  11. California Open Data

    Tree Characteristics - Spears and Didion Ranches [ds320] Extended Table

    California Department of Fish and WildlifeUpdated 14 Nov 2026

    4" dbh and within the 12.6 m radius plot. If a plot number is missing, then there were no trees at the sample points and vegetation plots.

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  12. California Open Data

    Tree Characteristics - Spears and Didion Ranches [ds320]

    California Department of Fish and WildlifeUpdated 14 Nov 2026

    These data are the characteristics of the individual live trees found in 0.05-ha circular plot habitat samples taken in 2005 at sample points at Spears and Didion Ranches, Placer County, California. There were three 0.05-ha circular habitat …

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  13. California Open Data

    Tree Characteristics - Spears and Didion Ranches [ds320] Extended Table

    California Department of Fish and WildlifeUpdated 14 Nov 2026

    These data are the characteristics of the individual live trees found in 0.05-ha circular plot habitat samples taken in 2005 at sample points at Spears and Didion Ranches, Placer County, California. There were three 0.05-ha circular habitat …

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    • ARCGIS GEOSERVICES REST API
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    • GEOJSON
  14. California Open Data

    Tree Characteristics - Spears and Didion Ranches [ds320] Extended Table

    California Department of Fish and WildlifeUpdated 14 Nov 2026

    These data are the characteristics of the individual live trees found in 0.05-ha circular plot habitat samples taken in 2005 at sample points at Spears and Didion Ranches, Placer County, California. There were three 0.05-ha circular habitat …

    • HTML
    • ARCGIS GEOSERVICES REST API
    • CSV
    • GEOJSON
  15. California Open Data

    Tree Characteristics - Spears and Didion Ranches [ds320]

    California Department of Fish and WildlifeUpdated 14 Nov 2026

    These data are the characteristics of the individual live trees found in 0.05-ha circular plot habitat samples taken in 2005 at sample points at Spears and Didion Ranches, Placer County, California. There were three 0.05-ha circular habitat …

    • HTML
    • ARCGIS GEOSERVICES REST API
    • CSV
    • GEOJSON
    • ZIP
    • KML
  16. California Open Data

    NLCD 2019 Land Cover California Subset

    California Department of Fish and WildlifeUpdated 14 Nov 2026

    The U.S. Geological Survey (USGS), in partnership with several federal agencies, has developed and released five National Land Cover Database (NLCD) products over the past two decades: NLCD 1992, 2001, 2006, 2011, and 2016. The 2016 release …

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  17. California Open Data

    NLCD 2013 Land Cover California Subset

    California Department of Fish and WildlifeUpdated 14 Nov 2026

    The U.S. Geological Survey (USGS), in partnership with several federal agencies, has developed and released five National Land Cover Database (NLCD) products over the past two decades: NLCD 1992, 2001, 2006, 2011, and 2016. The 2016 release …

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    • ARCGIS GEOSERVICES REST API
  18. California Open Data

    NLCD 2011 Land Cover California Subset

    California Department of Fish and WildlifeUpdated 14 Nov 2026

    The U.S. Geological Survey (USGS), in partnership with several federal agencies, has developed and released five National Land Cover Database (NLCD) products over the past two decades: NLCD 1992, 2001, 2006, 2011, and 2016. The 2016 release …

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    • ARCGIS GEOSERVICES REST API
  19. California Open Data

    NLCD 2008 Land Cover California Subset

    California Department of Fish and WildlifeUpdated 14 Nov 2026

    The U.S. Geological Survey (USGS), in partnership with several federal agencies, has developed and released five National Land Cover Database (NLCD) products over the past two decades: NLCD 1992, 2001, 2006, 2011, and 2016. The 2016 release …

    • HTML
    • ARCGIS GEOSERVICES REST API
  20. California Open Data

    NLCD 2006 Land Cover California Subset

    California Department of Fish and WildlifeUpdated 14 Nov 2026

    The U.S. Geological Survey (USGS), in partnership with several federal agencies, has developed and released five National Land Cover Database (NLCD) products over the past two decades: NLCD 1992, 2001, 2006, 2011, and 2016. The 2016 release …

    • HTML
    • ARCGIS GEOSERVICES REST API
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