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New City of Pomona Reorganization No. 2015-14 (Detachment from Diamond Bar and Annexation to Pomona)

Reorganization No. 2015-14 to the City of Pomona ( Detachment from City of Diamond Bar) became effective April 13, 2017. To download the shapefile of the detachment/annexation boundary, click on the link below. The overlapping polygons indicate territories that transferred between cities.

Reorganization No. 2015-14 to City of Pomona ( Detachment from City of […]

Countywide Statistical Areas (formerly called Board Approved Statistical Areas) – Final Draft

Countywide Statistical Area (formerly called Board Approved Statistical Areas) provide a common geographic boundary for reporting departmental statistics for unincorporated areas to the Board of Supervisors. They are not designed to perfectly represent communities, nor jurisdictional boundaries such as the Angeles National Forest. References below might still be for BASA – but they […]

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 […]

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 […]

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 downloaded from […]

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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2011 Redistricting Data

As part of the 2011 Supervisorial Redistricting process, Los Angeles County prepared a number of methods for citizens to propose their own plans and submit them to the Board for consideration. Click here to go to the Redistricting Site.

Those methods included an online tool to do this, but we wanted […]

Proposed City Reorganizations (Annexations/Detachments)

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 […]

Orange County City and Special District Boundaries

I was informed that high quality boundary files for cities and special districts in Orange County are available from Orange County LAFCO’s website.

Orange County GIS Data

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

As well, Orange County Transportation Authority has a website to download […]

Los Angeles County Boundary

We’ve moved!

The Los Angeles County boundary, along with the city boundary lines and polygons, were consolidated into the City Annexations post on this portal.

 

City Boundaries and Annexations/Detachments

 

View City Annexations/Detachments Online

Online Viewer – Use this application to search, view, and download county/city/annexation/detachment boundaries as well as recorded annexation/detachment documents, maps, and legal descriptions.

Online Mobile – Using ArcGIS Online, this map […]

Registrar Recorder Precincts

Updated as of August 2017

Contains precincts from the Los Angeles County Registrar/Recorder’s Office. The Registrar/Recorder uses these precincts to run elections by grouping them into election precincts, so they capture the boundaries of all voting districts in the County, including, but not limited to:

LA County Supervisorial Districts US Congressional Districts State Senate and […]

Polling Places – March 7, 2017 election

Polling locations assigned for the March 7, 2017 Consolidated Municipal and Special Elections as of February 21, 2017. Note – these polling locations are subject to change. Changes occur when polling locations become unavailable at the last minute, or for a variety or reasons. The Los Angeles County Registrar/Recorder establishes polling locations for each election. […]

LA City Council Districts (2012)

 

Updated December 2013.

LA City Council Districts as adopted by Final Ordinance 2012 No. 182168. This data was provided by the City of Los Angeles.

These boundaries are legally accurate as specified by the Los Angeles City Bureau of Engineering.

Download

Download the shapefile (includes sample layer file): LA […]

LA City Planning GIS Data Portal

LA City Planning GIS Data Portal

The City of Los Angeles Planning department has launched a GIS Data Portal for downloading various GIS data files pertaining to City Planning information.

You can access the data by going to http://planning.lacity.org, selecting the Maps and Stats button on the left, then […]

2011 Supervisorial District Boundaries (Official)

Abstract: This layer contains the 2011 Official Supervisorial District Boundary for the County of Los Angeles, drawn at the parcel level, per Assessor parcels and the County Cadastral Landbase.Download Data

Download the 2011 Supervisorial District Boundaries (zipped shapefile)

Purpose: Supervisorial District Boundary maps for the County of Los Angeles

Supplemental Information: Adopted […]

California Spatial Information Library (CaSIL)

The Cal-Atlas site facilitates the coordinated and sustainable development, maintenance, licensing and sharing of geospatial data and web map services by California government agencies, partners and stakeholders. California government agencies work with the California GIS Council, regional GIS collaboratives and the broader California GIS community to define the data architecture, systems, standards, agreements and processes […]

US Congressional Districts (2011)

Congressional (2011)

2011 United States Congressional Districts clipped to the LA County Boundary.

This data was created by the California Citizen’s Redistricting Commission, and downloaded from their website. Click here to go to the site.

This data is based upon the US Census Bureau’s TIGER basemap, and are not the […]

California Board of Equalization Districts (2011)

BOE (2011)

2011 California Board of Equalization Districts clipped to the LA County Boundary.

This data was created by the California Citizen’s Redistricting Commission, and downloaded from their website. Click here to go to the site.

This data is based upon the US Census Bureau’s TIGER basemap, and are not […]

California State Senate Districts (2011)

State Senate (2011)

2011 California State Senate Districts clipped to the LA County Boundary.

This data was created by the California Citizen’s Redistricting Commission, and downloaded from their website. Click here to go to the site.

This data is based upon the US Census Bureau’s TIGER basemap, and are not […]

California State Assembly Districts (2011)

State Assembly (2011)

2011 California State Assembly Districts clipped to the LA County Boundary.

This data was created by the California Citizen’s Redistricting Commission, and downloaded from their website. Click here to go to the site.

This data is based upon the US Census Bureau’s TIGER basemap, and are not […]

2011 Supervisorial District Boundaries (Adopted September 27, 2011)

Approved Boundaries

This GIS data file contains 2011 County Board of Supervisors district boundaries adopted September 27, 2011.

For full details of the process , please see this site: http://redistricting.lacounty.gov/. The 2011-Board-Adopted-Plan (pdf file) is loaded here for your convenience.

These boundaries are based upon Redistricting Units (RDUs) which in […]

Historic LA County Supervisorial Districts (1971 – 1991)

Supervisorial District Boundaries for LA County for 1971, 1981, and 1991.

Samples (click to enlarge)

1971

1981

1991

The data from 1991 was provided by the Registrar/Recorder.

The data from 1971 and 1981 was digitized from scanned and rectified County Engineer maps provided […]

LA City Council Districts (2002)

Boundaries of LA City Council Districts, with District Number. The source of this data is the City of Los Angeles.

Data Download

LA_City_Council_Districts.zip (shipped shapefile) ArcGIS 10 Layer File (for County use only)

Sample

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SCAG Data

SCAG is the Southern California Association of Governments. SCAG is the nation’s largest metropolitan planning organization, representing six counties, 191 cities and more than 19 million residents. SCAG undertakes a variety of planning and policy initiatives to encourage a more sustainable Southern California now and in the future.

 

Mapping & GIS at SCAG

Their […]

City/Community Boundaries

This file has unofficial but commonly used Community Boundaries in the County of Los Angeles

Legal Cities (like Los Angeles) are represented as well as communities (like Hollywood or Acton).

Communities (zipped Shapefile)

US Congressional Districts

US Congressional Districts in the County of Los Angeles […]

Supervisorial Districts (2001)

LA County Supervisorial Districts (2001) […]