Many thanks to Harvard University Library for scanning and georeferencing these maps.
Click below to download
THIS LAYER HAS BEEN REMOVED pending the update of the Proposed Significant Ecological Areas Ordinance. Please visit the SEA Ordinance Page for the latest update on the status of this project (please click here). Below is the text that was posted in May, 2014 for this layer–FOR INFORMATIONAL PURPOSES ONLY:
This layer is […]
Proposed updates to the Significant Ecological Areas are based on aerial imagery and parcels. Please note that proposed SEAs have not been officially adopted as part of the L.A. County General Plan. For the Existing/Adopted SEAs click here.
Proposed SEAs as defined by the Antelope Valley Area […]
The Statewide Integrated Traffic Records System (SWITRS) is collected and maintained by the California Highway Patrol (CHP). SWITRS contains all collisions that were reported to CHP from local and governmental agencies.
The data available here were downloaded from the Transportation Injury Mapping System (TIMS) as UC Berkeley (http://tims.berkeley.edu/index.php). TIMS […]
The following table provides some information on proposed city reorganizations (annexations/detachments) within Los Angeles County which have been submitted to and accepted by LAFCO for processing. The main purpose of this webpage is to make available the boundaries of the proposed reorganizations in GIS (shapefile) and image (PDF or JPEG) formats.
If you are looking for city boundaries or city annexation/detachment history, […]
Assessor Parcels from the 2014 Tax Roll are now available for download!
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. The Assessor has recently changed its policies and […]
This dataset shows the geographic boundaries of public safety answering points, tied to correct/legal city boundaries. These geographic boundaries determine where an emergency call is routed, especially in the new e911 system. A Public Safety Answering Point (PSAP) is a state-managed local center where all 911 calls are routed. They are typically […]
For planning purposes & reference within the General Plan Update.
Countywide layer which divides the County of Los Angeles into 11 Planning Areas. These area divisions were created for the LA County Dept. of Regional Planning by the GIS Section under direction from the General Plan Development Section. Reflects the most recent changes from the […]
I was recently made aware of a couple of sites where NOAA makes data available.
West Coast Ocean Data Portal, which hosts data related to the oceans on the west coast:
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 […]
Update January 2015: This update added the new San Gabriel Mountains National Monument, as well as changes to the Wilderness areas in the monument (they are now the boundaries from the US Forest Service). There are also changes to the way that the these boundaries are represented. In the past the wilderness areas were clipped out of the […]
These districts were established when zoning was created for Los Angeles County many years ago. It was a way to break the county up into distinct areas, smaller units, for easier record keeping and organization. It is still in use to identify and keep track of those ordinances and for running queries […]
This data depicts generalized land use classifications, each of which is intended to describe the dominant use characteristics within the area covered. Updated information regarding public parks, school sites, freeways, rail/transit lines, and other ownership-specific boundaries have been incorporated into this data. The actual use and intensity of development that may be […]
For UNINCORPORATED areas of Los Angeles County only. A Specific Plan implements the General Plan/Community Plan and is a more detailed version of the General Plan for a focused area. The Specific Plan articulates planning considerations and imposes regulations or controls. Updated 9/3/14 to add Marina Del Rey and Santa Catalina Island.
The Land […]
This is zoning for the unincorporated areas of Los Angeles County.
For more complete information, see Title 22 (Planning and Zoning) of the Los Angeles County Code, or stop by the office of the Los Angeles County Department of […]
A town council is a democratically elected form of government for small municipalities or civil parishes. A council may serve as both the representative and executive branch. Click here for more information regarding Town Councils within the unincorporated communities of Los Angeles County. Source: individual town councils and the […]
This identifies areas that are presently or historically used for agricultural purposes. This information was digitized from the 1986 Antelope Valley Hazards and Resources map, and the 1980 General Plan Special Management Areas map. Source: Antelope Valley Area Plan (1986), General Plan Special Management Areas (1980).
Data can be downloaded here:
I was informed that high quality boundary files for cities and special districts in Orange County are available from Orange County LAFCO’s website.
Of greatest interest to most folks is the LA Times Neighborhood dataset (click here to access), as well as the LA County Regions.
NOTE: This layer has been rescinded due to the update of the Santa Monica Mountains Local Coastal Program, certified by the California Coastal Commission on October 10, 2014 (a link to the resolution is here). The new Sensitive Environmental Resource Areas and other Biological […]
The community standards districts are established as supplemental districts to provide a means of implementing special development standards contained in adopted neighborhood, community, area, specific and local coastal plans within the UNINCORPORATED areas of Los Angeles County, or to provide a means of addressing special problems which are unique to certain geographic […]
This layer delineates ridgelines within selected CSDs whereupon restrictions are established for grading and ridgeline development. For more information on specific CSDs where these ridgelines reside, click here. Last updated 10/29/14 for updated Significant Ridgelines in newly certified Santa Monica Mountains Coastal Plan.
Data can be downloaded here:
The Fire Department’s jursidictional areas. Includes: Stations-170, Battalions-22, Divisions-9 and Regions-3. There are 199 individual polygons with 30 Stations having 2 or more discrete polygons.
Orange County now has a data portal for downloading GIS data, including parcels, road lines, etc. This looks like a very nice capability. You have to register to access the data, but it’s a great step forward: Click here to access
LA County, through its LARIAC program, has updated its 2008 building outlines to incorporate changes since the buildings were initially captured in 2008 (click here to view and download that data).
This new data is NOT public – you must be a member of LARIAC to access it. If you are interested in becoming a […]
This award winning application for iOS and DROID enables residents of Los Angeles County to interact with the Departments of Public Works, Parks and Recreation, Public Health, and Regional Planning by
Requesting facility and trail maintenance at County parks, as well as reporting potential health and safety […]
Note: The files within the repository have changed (.dbf rather than .csv)
We have loaded numerous County of Los Angeles population and poverty estimates at either the Census Tract level OR Census Tract-City split areas by age, gender, and/or race-ethnicity into the eGIS_Demographic database and the internal networked drive (members\Demography folder).
These datasets […]
A limited number of Substructure maps in “pdf” format are available via GIS polygons representing grids containing URL links. Across various areas of Los Angeles County, paper maps were created by the Department of Public Works (DPW) and its predecessors to show underground utilities such as cable TV, gas, […]
Current data date: July 2014
Download the data
LMS_Data_20140707 – Zipped file geodatabase. Due to the length of a number of the fields, a shapefile with its 255 character limit is unable to store all of the information regarding description, hours, phone numbers, etc. This data was extracted July 7th, 2014. This is the […]
Abstract: This GIS layer was created to delineate catchment areas for Municipal Separate Storm Sewer System (MS4) outfalls under the Los Angeles County Flood Control District (LACFCD) jurisdiction pursuant to a 2012 National Pollutant Discharge Elimination System (NPDES) permit.
Description: The data is a compilation of storm drain hydrology studies completed by the […]
The city boundary lines and polygons, along with the Los Angeles County boundary, were consolidated into the City Annexations post on this portal.
Starting in September 2014, the data will be uploaded every week on Sunday with the newest revisions from the CAMS system.
Important note: This is the first output of the final data structure. In the next few weeks we will begin providing weekly updates as well as a number of related symbolization files.
While this isn’t GIS data directly, the data available at the Traffic Data Branch website can be spatially enabled to show traffic counts at the various intersections of the State Highway System.
Data available include:
Traffic Counts […]
Data Licensed from US Data Depot showing the location, type, size, and other attributes for over 720,000 businesses in Los Angeles County. This data is for internal County use only and cannot be provided to external agencies. Pricing for this data is available at the
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 […]
For the list of cities served, operational maps, or for more information about the CSMD, please visit the Los Angeles County Sewer Maintenance home page.
The Los Angeles County boundary, along with the city boundary lines and polygons, were consolidated into the City Annexations post on this portal.
The file is used to generate maps for planning purposes. It is also used as a basemap for GIS web applications showing the each DCFS Regional Offices and satellite sites location. The file is geocoded based on the address locations of each DCFS Regional Offices and Site location. […]
This layer was created for retrieving the earliest recorded surveys of original Spanish and Mexican land grants (Ranchos), along with original plats of the United States Public Lands Survey System (PLSS). The URL field points to documents (PDF) on the Land Records Information website, hosted by the Los […]
Significant Ecological Areas (SEA) Significant Ecological Area (SEA) means an area that is determined to possess an example of biotic resources that cumulatively represent biological diversity for the purposes of protecting biotic diversity, as part of the Los Angeles County general plan or the city’s general plan. […]
The grid that shows the zoning maps that cover the unincorporated areas of Los Angeles County. This grid follows alignment and numbering system as the Department of Public Works House Numbering Maps. This was developed as part of the Zoning Map Conversion and Integration Project (ZCIP) – 2002 to 2006.
UPDATED on […]
Los Angeles County GIS Data Portal 2015
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