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85th and 95th Percentile Rainfall

These layers represent the spatial distribution of the 85th and 95th percentile, 24-hour rainfall within the County of Los Angeles.

Rainfall gages throughout the County were selected based on spatial distribution and rainfall record length to determine the 85th and 95th percentile, 24-hour rainfall. The 85th and 95th percentile, 24-hour rainfall can be used to […]

Los Angeles County Fire Department Map Index Grid

This map page grid was designed and implemented by the Los Angeles County Fire Department, Special Services Bureau, Information Management Division, and Geographic Information Systems Section. Wholly based on the United States National Grid (USNG), it aims to be the Los Angeles County regional grid because of its ease of use and extensive coverage.

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Los Angeles County Fire Department Battalion Boundaries

Fire Battalion boundaries for the Los Angeles County Fire Department. Currently there are 22 Battalions in the Department.

The data herein is for informational purposes, and may not have been prepared for or be suitable for legal, engineering, or surveying intents. The Los Angeles County Fire Department reserves the right to change, restrict or discontinue […]

Los Angeles County Fire Department Division Boundaries

Fire Division boundaries for the Los Angeles County Fire Department. Currently, there are 9 Divisions in the Department.

The data herein is for informational purposes, and may not have been prepared for or be suitable for legal, engineering, or surveying intents. The Los Angeles County Fire Department reserves the right to change, restrict or discontinue […]

Los Angeles County Fire Department Region Boundaries

Fire Region boundaries for the Los Angeles County Fire Department. Currently, there are 3 Regions in the Department.

The data herein is for informational purposes, and may not have been prepared for or be suitable for legal, engineering, or surveying intents. The Los Angeles County Fire Department reserves the right to change, restrict or discontinue […]

General Plan Buildout

This layer is a combination of the Buildout for the General Plan 2035 and the Antelope Valley Area Plan, that was generated for the EIRs for both plans. The Board of Supervisors adopted both the Antelope Valley Area Plan and General Plan 2035 on 6/16/15 and 10/6/15, respectively. The Antelope Valley Area Plan contained the […]

USGS Quad Map Grids

Pasadena Quad

These datasets contain the geographic extent of USGS 1:24,000 topographic maps (7.5- by 7.5-minute quadrangles).

Data Downloads

LA County: This dataset is optimized for LA County – some quad sheets are actually extended beyond the cord grid system to cover small areas of coastline.

Click here to […]

Assessor Parcels – 2015 Tax Roll

Assessor Parcels from the 2015 Tax Roll

The Office of the Assessor (click here for their website) maintains assessment records of real and personal property in the County of Los Angeles, as well as a GIS Tax Parcel Base Map. They will be available here, as well as on […]

Scenic Drives

Scenic Drives

Introduced by the Antelope Valley Area Plan, adopted by the Board of Supervisors on 6/16/15, the Scenic Drives layer identifies major roads that have scenic signifigance. Also establishes development guidelines to help preserve their scenic qualities. For more information, please see Chapter 4 of the Antelope Valley Area Plan […]

Oil and Gas GIS Data

The Bureau of Ocean Energy Management (BOEM) promotes energy independence, environmental protection and economic development through responsible, science-based management of offshore conventional and renewable energy and marine mineral resources.

BOEM handles the actual Oil and Gas Lease Sales, along with Marine Minerals negotiated agreements and official maps and GIS data.

GIS Data […]

US Maritime Limits and Boundaries

Maritime Limits and boundaries are available as downloads from NOAA at this site: http://www.nauticalcharts.noaa.gov/csdl/mbound.htm (look for the Static Data Downloads below the map).

Maritime limits and boundaries for the United States are measured from the official U.S. baseline, recognized as the low-water line along the coast as marked on […]

OpenStreetMap (OSM) California Downloads

Download: OSM California Streets, etc. (Geofabrik)

Download: OSM Land Polygons (Jochen Topf and Christoph Hormann)

OpenStreetMap (OSM) is built by a community of mappers that contribute and maintain data about roads, trails, cafes, railway stations, and much more, all over the world. Luckily, Geofabrik, a German-based consulting firm regularly […]

State Responsibility Area (SRA)

The State Responsibility Area (SRA) is the area of the state where the State of California is financially responsible for the prevention and suppression of wildfires. SRA does not include lands within city boundaries or in federal ownership. To see if a parcel is within the SRA enter in the parcel address in the Board […]

MTA Park & Ride Locations

Park and Ride Locations from MTA. Visit the LA Metro Developer site for other metro or more current data.

Click here to download the data.

Los Angeles County Fire Department Jurisdictional 2000 Meter Grid

The Los Angeles County Fire Department is utilizing a 2000 meter grid system for dispatching, data analysis and map production. It is based on the 1000 meter grid developed by the United States National Grid (USNG). A page numbering system for this 2000 meter grid was created for use by the Los angeles County Fire […]

Coastal Oblique Imagery (February 2016)

NOAA has released a set of oblique imagery captured February 6-9, 2016. On the same site is baseline imagery under the 2015 tab of imagery collected in September 2015. NOAA is collecting this data in order to assess impacts to several NOS mission areas including navigation and coastal zone management as well […]

Planet Labs releases open California imagery datasets

Planet Labs captures imagery from micro-satellites – they have made imagery for California Open for use.

I didn’t have the opportunity to see exactly how to get the data into my apps and desktop, but here is the web page: https://www.planet.com/open-california.

From their page:

Frequently Asked Questions What data is included in […]

Homeland Infrastructure Foundation Level Data (HIFLD) Open Data Portal

The HIFLD Subcommittee is pleased to announce the release of the HIFLD Open data portal .

LA County leverages a fair amount of this data to provide emergency response preparedness as well as including publicly available data in our Points of Interest file. There is a lot of good information there.

HIFLD Open […]

Publicly Funded Mental Health Service Provider Locations

This file is a listing of all publicly funded mental health service locations in the County of Los Angeles. Service locations are classified by modality such as Inpatient, Outpatient and Residential. Provider information includes address, phone number, operation hours, age-group served, service area, supervisorial district, languages/cultures served and programs/services provided at the location.

This data-set […]

Medical Service Study Areas 2013

This file contains boundaries of Medical Service Study Areas (MSSA) provided to LA County by the California Office of Statewide Health Planning and Development (OSHPD). The purpose of this designation is to identify areas of greatest need so that limited resources can be prioritized and directed to the people in those areas.

A MSSA is […]

Estimated Prevalence of Serious Mental Illness

This data set contains estimated number of people with Serious Mental Illness for Adults and Serious Emotional Disorder for Children by the 2010 census tract in the County of Los Angeles in Calendar Year (CY) 2014. The prevalence rates are calculated by the UCLA-California Health Interview Survey (CHIS) by age, gender, ethnicity and Federal Poverty […]

RRCC Precinct Map Index

This Layer contains the grid of Precinct Maps for the County of Los Angeles. The RRCC Precinct Map Index divides the County of Los Angeles into 1620 polygons geospatially representing the locations of the Registrar-Recorder/County Clerks 7,759 Precincts/33,365 subprecincts (numbers subject to change). Each polygon covers an area 10,000 X 75,000 feet.

Download the data […]

RRCC Map Index

This Data Layer contains the RRCC Map Tile Index. This layer consists of 105 Polygons used in conjunction with the RRCC’s County Precinct Map Grid. When the Tile Index is overlayed, the Precinct Maps will be grouped into 16 or less pages per tile.

Download the data here.

Park Planning Areas

Park planning areas are geographic boundaries in unincorporated Los Angeles County as defined by the Department of Parks and Recreation. These boundaries are used to assist in calculating fees associated with subdivisions to satisfy a subdivider’s obligations to provide park land, or open space in accordance with Los Angeles County Code, Title 21, Section 21.28.140. […]

Mile Markers

Click Here to Download

Summary

Location of mile marker post with attached attributes of : TYPE is MM for Mile Marker, ST_NAME is street name, CONDITION, SURVEYOR is person who located the position, SOURCE is GNSS for Trimble R8 receiver or GEOXH for the GeoXH 6000 receiver, POINTID is data collection point number […]

Los Angeles County Flood Control District Right-of-Way Parcels

The Los Angeles County Department of Public Works is focused on creating an interactive environment that allows efficient access to flood control right-of-way information for our customers. This dataset contains the boundaries of the Los Angeles County Flood Control District (LACFCD) right-of-way parcels and distinguishes between fee, easement, quitclaim, and other.

 

Download: LACFCD […]

Census Tract & City Split Areas (AKA Split Tracts) File

Census Tract & City Split Areas (AKA Split Tracts) File, to be used for demographic estimates.

This file contains 2010 Census Tracts Split by Legal City Boundaries. This file is also known as the Split Tracts file. It is used to estimate population changes over time. The Census Tract boundaries have been altered where necessary […]

CENSUS TRACTS

The Census Bureau (http://www.census.gov/) maintains geographic boundaries for the analysis and mapping of demographic information across the United States. Every 10 years the Census Bureau counts the population of the United States as mandated by Constitution. The Census Bureau releases the results of this county as demographic data with geographic identifiers so […]

CENSUS DESIGNATED PLACES

Census Designated Places (CDPs) are the statistical counterparts of incorporated places, and are delineated to provide data for settled concentrations of population that are identifiable by name but are not legally incorporated under the laws of the state in which they are located.

The boundaries usually are defined in cooperation with local or tribal officials […]

US Census Summary File 1 (2010)

These Summary File 1 tables provide the most detailed counts available so far from the 2010 Census, including cross-tabulations of age, sex, households, families, relationship to householder, housing units, detailed race and Hispanic or Latino origin groups, and group quarters at the census tract level.

Census Bureau Releases New Local-Level Demographic Information from 2010 Census […]

Parking Lot Boundaries – Commercial, Industrial, Government (2014)

This dataset contains the boundaries of parking lots in the County of Los Angeles 5,000 square feet and larger for commercial, industrial, and government properties.

Description

The Los Angeles County Office of Sustainability funded the development of this dataset in order to support the identification of potential locations for the installation […]

Probation Sites

This dataset consists of probation adult area offices, juvenile area offices, juvenile halls, juvenile camps, and external community based organizations.

Note: This dataset is for internal use only.

Probation Group Homes

This dataset contains probation group homes. This dataset is used for analysis, for instance, to understand a district’s area of coverage in relation to the number of group homes in a district.

Note: This dataset is for internal use only.

Probation Juvenile District

This dataset contains Los Angeles County’s juvenile probation district. This dataset is used for analysis, for instance, to understand a district’s area of coverage in relation to the number of offices in a district.

Note: This dataset is for internal use only.

Probation Adult District

This dataset contains Los Angeles County’s adult probation district. This dataset is used for analysis, for instance, to understand a district’s area of coverage in relation to the number of offices in a district.

Note: This dataset is for internal use only.

Split 2010 Block Group/City – Community Statistical Area (formerly BASA)

This dataset contains 2010 Block Groups, updated to improve geographic accuracy, split by City boundaries for each year since 2010. It is a foundation-level dataset that is used to create many other datasets and reporting within the County, including:

Legal City Boundaries Census Block Group and Tract Boundaries – which is used to […]

Locations/Points of Interest (LMS Data) – January 2016

Current data date: January 2016

The major changes to this file include an update of all public school locations from the State Department of Education

Download the data

LMS_Data_Public_20160114_gdb – Zipped file geodatabase – full dataset LMS_Data_Public_20160114_shapefile – Due to the length of a number of the fields, a shapefile’s 255 […]

Department of Public Works Field Facilities – Points

 

Abstract:

The Los Angeles County Department of Public Works (DPW) facility points show the location of field facilities owned by or under the jurisdiction of DPW. These points are used by the Service Locator web application that allows the public to find the location of services provided by DPW.

Purpose:

To locate public […]

DISASTER MANAGEMENT AREAS

This dataset represents Disaster Management Areas within the Los Angeles County Operational Area.

Los Angeles County serves as the intermediate level of government that coordinates and communicates disaster response needs between the eighty-eight (88) cities within its geographic boundaries and the State of California. The County is divided into eight Disaster Management Areas (A, […]

Active Wells

Abstract:

The Los Angeles County Department of Public Works has developed a groundwater well web viewer to provide the public with current and historical groundwater depth information throughout Los Angeles County.

 

Purpose:

To provide active wells information to the public.

 

Supplemental Information:

 

The State of California Department of […]

Flood Zones

Abstract:

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)

Abstract:

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 […]

Parcel Lines

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Summary

The Tax Parcel Lines file shows the boundaries of Tax Parcels. This file is used by the Assessor to construct the tax parcel polygons and to produce the Assessor Map Book pages utilized to locate and identify all the Tax Parcels within the County.

Description

The linework contained in this file […]

NAIP (National Agriculture Imagery Program) Imagery

The National Agriculture Imagery Program (NAIP) is a program to acquire peak growing season “leaf on” imagery, and deliver this imagery to USDA County Service Centers, in order to maintain the common land unit (CLU) boundaries and assist with farm programs.

This data is different from our LARIAC imagery because it contains a 4th […]

Employment Protection Districts

This layer represents the employment protection districts as depicted in Figure 14.1 in the General Plan 2035. Employment Protection Districts are economically-viable industrial and employment-rich lands, with policies to prevent the conversion of industrial land to non-industrial land.

Download Shapefile (.zip)

Agricultural Resource Areas

Agricultural Resource Areas

Agricultural Resource Areas were introduced with the Antelope Valley Area Plan that was adopted on 6/16/15 by the Board of Supervisors. They are meant to preserve Agricultural activities in the Antelope Valley and encourage low-density development. For more information, please reference the Antelope Valley Area Plan, Chapter 4 […]

Tax Rate Area Table (2015) – Auditor Controller

Summary

This dataset contains TRAs for July 1, 2015.

The Tax Rate Area (TRA) contains the taxing authority for each Tax Rate Area as established by the State Board of Equalization, as well as the tax rates for each authority. It is shown on the property tax bill that is mailed to owners […]

Tax Rate Area Table (2014) – Auditor Controller

Summary

This dataset contains TRAs for July 1, 2014.

The Tax Rate Area (TRA) contains the taxing authority for each Tax Rate Area as established by the State Board of Equalization, as well as the tax rates for each authority. It is shown on the property tax bill that is mailed to owners […]

LA City Communities and Planning Areas

A number of LA City boundaries are available, including:

LA City Community Boundaries LA City Neighborhood Council Boundaries LA City Community Plan Areas

Some of these datasets were downloaded from the LA City Planning GIS Data Download Page – and others from the LA City Open Data Portal.

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LA County Bathymetry Data

The USGS developed a number of valuable bathymetric datasets off the coast of Los Angeles County in 1996 that we have loaded into our repository, and are made available here. The datasets include:

Source backscatter data 50 foot contours Bathymetry data in DEM format Hillshade Bathymetric Relief

For more details please visit: https://walrus.wr.usgs.gov/pacmaps/la-index.html

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