Log In

Woolsey Fire (Nov 2018) GIS Data & Applications

This post will provide links to GIS layers and online web mapping applications related to the Woolsey Fire Incident (November 2018; Los Angeles and Ventura counties).


Websites and Applications

For information about the Woolsey Fire, including information about L.A. County resources available – click here

A direct link to the online […]

Fire Hazard Severity Zones – State Responsibility Area (SRA)

Fire Hazard Severity Zones within SRA (State Responsibility Area) in Los Angeles County. This dataset provides zones in SRA, as adopted by CAL FIRE on November 7, 2007.

PRC 4201-4204 and Govt. Code 51175-89 direct the California Department of Forestry and Fire Protection (CDF) to map areas of significant fire hazards based on […]

Fire Hazard Severity Zones – Local Responsibility Area (LRA)

Very High Fire Hazard Severity Zones within LRA (Local Responsibility Area) in Los Angeles County. These zones were established in 2008.

PRC 4201-4204 and Govt. Code 51175-89 direct the California Department of Forestry and Fire Protection (CDF) to map areas of significant fire hazards based on fuels, terrain, weather, and other relevant factors. These zones, […]

Near Source Zones

This dataset presents areas where an additional factor should be used to reduce risk to property and life in the event of an earthquake. The near-source maps are based on research in which most buildings that collapse or have severe damage after an earthquake are located within five kilometers (three miles) of […]

2017 Total Solar Eclipse Map and Shapefiles

Map of the solar eclips

In case you are getting excited about the upcoming Solar Eclipse, NASA has provided a set of shapefiles that will help you determine the exact coverage where you are. Or figure out where to hide :).

There are a couple of different versions – both small and large […]

CalEnviroScreen 3.0

In January 2017, The California Office of Environmental Health Hazard Assessment (OEHHA), on behalf of the California Environmental Protection Agency (CalEPA) released the latest version of CalEnviroScreen. Below is a brief description from their website. On their website you will be able to view the data with interactive maps, read the report in […]

Santa Monica Mountains Local Coastal Plan – GIS layers

These are the main layers that were used in the mapping and analysis for the Santa Monica Mountains Local Coastal Plan, which was adopted by the Board of Supervisors on August 26, 2014, and certified by the California Coastal Commission on October 10, 2014. Below are some links to important documents and web mapping applications, […]

Public GIS Mapping Services

We are making a number of our GIS data layers available as public mapping services based upon ESRI’s ArcGIS Server technologies at this URL (http://public.gis.lacounty.gov/public/rest/services). More details on each service will follow as we have the time to describe them, but generally they include GIS data that can be […]


The TSUNAMI_INUNDATION dataset represents coastal areas that might be inundated by tsunami waves during a tsunami event. During a tsunami, usually a series of ocean waves rushes towards land and inundates or floods otherwise dry land.

This TSUNAMI_INUNDATION_LINES dataset represents the maximum expected run-up line of inundation during a tsunami event. During a […]

Flood Zones


The Federal Emergency Management Agency (FEMA) creates and provides authoritative data related to flood insurance. Using that data, the Los Angeles County Department of Public Works has developed a public-facing web viewer for accessing flood zone information in the County of Los Angeles (Flood Zone Determination Website). Flood zones are […]

Flood Insurance Rate Maps (FIRMs)


The Federal Emergency Management Agency (FEMA) creates and provides authoritative data related to flood insurance. Flood Insurance Rate Maps (FIRMs) data, where available digitally, can be found on the official FEMA’s National Flood Hazard Layer.

Looking for more than just FIRMs? Visit Search All Products to access the full […]

USGS Faults

This dataset contains quaternary faults within 50 miles of Los Angeles County.

Click here to download the shapefile


The source of this data is the USGS Earthquake Hazards Program. The data was downloaded from the Faults and Folds Database website (click to access).

The USGS has comprehensive metadata on […]

Flood Hazard data from FEMA

If you are looking for flood zone data, you can access the information from FEMA through the FEMA GeoPlatform.

Here is a link to the home page: https://hazards.fema.gov/femaportal/wps/portal/NFHLWMS. At this site you can access the FEMA webmap to download data, and there are instructions on how to access FEMA map services for […]

Los Angeles County Fire Department – Historic Fire Perimeters

Historic Fire Perimeters from the Los Angeles County Fire Department. Fire perimeter data exists from 1966 through last year. Fire perimeter data is collected from field personnel during a major fire incident.

The data herein is for informational purposes, and may not have been prepared for or be suitable for legal, engineering, or surveying intents. […]

Methane Producing Landfills

This data was created on April 30, 2012 to represent known disposal sites in Los Angeles County that may produce and emanate methane gas. The shapefile contains disposal sites within Los Angeles County that once accepted degradable refuse material. Information used to create this data was extracted from a landfill survey performed by […]

Seismic Hazards – LA County (from State of CA)

Zones of required investigation for possible earthquake faulting, landslides, and liquefaction are delineated and distributed to cities, counties, and state construction agencies to help identify where higher building standards may be necessary for safe development.

Seismic Hazard Regulatory Hazard Zones Earthquake Fault Zone prevent buildings for human occupancy from being constructed upon […]

California Hazard Maps

CGS has developed a new online tool that allows you to search all of CGS’s Regulatory Maps, Landslide Maps and Tsunami Maps with related reports and GIS data. The new tool is now officially accessible through CGS’s home page. See below for a brief list of what the warehouse has to offer within each […]

Weather related GIS data

NOAA provides a wealth of GIS data, including updates of its weather predictions.

Here are some useful links:

The NWS GIS Data Portal, where you can download kml and shapefiles. From there, you can go to: The NWS Web Services Page, where you can get the connection information for live mapping […]

Dams and Debris Basins – Point Locations


Debris Basins are key components of the Los Angeles County Flood Control District’s (LACFCD) flood control system. Typically located at the mouths of canyons, debris basins capture sediment, gravel, boulders, and vegetative debris that are washed out of the canyons during storms, protecting lower lying communities from possible flooding and property damage. Due […]