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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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USGS Geographic Names Information System (GNIS)

This dataset contains the locations for Los Angeles County as noted by the US Board of Geographic Names. It is called the Geographic Names Information System (GNIS), and is the official dataset of all locations and names as recognized by the federal government.

These are points that are shown on USGS Topographic Quad […]

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 […]

Child Care Provider Facilities

The point data in the Child Care Facilities layer, represents the locations of State licensed child care providers within Los Angeles County.

DPSS has been tasked with the management and administration of the data. A child care facilities locator has been created for the purpose of assisting the public in identifying their nearest […]

DPSS Office Locations

Summary

This data is a representation of Department of Public Social Services (DPSS) district office locations, which are accessible to the public. There are additional offices that are not publicly available and are not included in this layer. The district offices in this layer, service the public with various programs administered by DPSS. […]

Tax Rate Area Polygons

Summary The Tax Rate Area Polygon file shows the boundaries of Tax Rate Areas, which is used by the Assessor to assign tax rates to properties. When joined with the Tax Rate Area Table, it can be used to determine the property tax rate for any area of the County.

Description

Districts and […]

California Statewide Parcel Boundaries

Summary

This is a collection of all of the parcel boundary datasets collected during the last round of parcel data collection by the Information Center for the Environment under funding from the California Strategic Growth Council. This dataset includes one file for each of the 51 counties that were collected, as well as […]

2010 Census Tracts (Spatial View)

This dataset is a spatial view and contains 2010 census tracts boundaries with the following attributes: P001, P003, P004, P005, P012, P014, P016, P017, P028, PCT 012, H0001, H003, H004, H005, H010, H013, MEDHINC, and age.

For Census technical documentation, go to http://www.census.gov/prod/cen2010/doc/sf1.pdf

2010 Census Tracts (Median Household Income)

For mapping 2010 census tracts by median household income in the County of Los Angeles. The dataset was downloaded from Census.gov. For Census technical documentation, go to http://www.census.gov/prod/cen2010/doc/sf1.pdf Download CENSUS_TRACTS_2010_MEDHINC (zipped shapefile)

2010 Census Tracts (Sex by Age)

This feature class shows 2010 Census Tracts (Sex by Age only) for Los Angeles County geographic area. The dataset was downloaded from Census.gov.

For Census technical documentation, go to http://www.census.gov/prod/cen2010/doc/sf1.pdf

2010 Census Blocks (Sex by Age)

This feature class shows 2010 Census Blocks (Sex by Age) for Los Angeles County geographic area. The dataset was downloaded from Census.gov and additional administrative boundary information was appended to the dataset.

For Census technical documentation, go to http://www.census.gov/prod/cen2010/doc/sf1.pdf

 

2014 Color Orthophotography – LARIAC 4

***NOTE***The 4-inch imagery is under license from Pictometry International, and cannot be publicly released.

This dataset represents natural color, leaf-off, 0.33-foot (4-inch) high-resolution, high-accuracy orthorectified aerial imagery, acquired by the Los Angeles Regional Imagery Consortium (LARIAC) in winter 2013/2014. This imagery covers the majority of urban/suburban areas of the County in mainland (approximately 2,898 square […]

Sensitive Environmental Resource Areas (SERA)

These are the Sensitive Environmental Resource Areas (SERAs) identified in the Santa Monica Mountains Local Coastal Program (SMMLCP), which was certified by the California Coastal Commission on October 10, 2014 (a link to the resolution is here). Also known as Biological Resources in the SMMLCP. Detailed descriptions of each of the habitat […]

Imagery of Southern California (Orange, Riverside, San Bernardino Counties) – 2014

USGS has now posted 2014 imagery for a portion of the southern California urban region. New imagery was collected in mid 2014 by USGS contractors for the built up areas around the Orange County and Riverside/San Bernardino urban areas. This region covers about 2,250 square miles. The images have a one foot resolution […]

2014 4-inch and 1 foot Orthophoto Imagery Seamline and Date Flown – LARIAC 4

These dataset contains the dates of the imagery as well as the image chips that were compiled into the 2014 Los Angeles Regional Imagery Acquisition Consortium (LARIAC4) 4-inch and 1-foot color orthophotography.

Each polygon contains an 8 digit number that corresponds to the date the image was acquired (for example, 20140125 corresponds […]

DPSS Program Service Area Boundaries

Summary This data is a representation of the program boundaries for Department of Public Social Services, for all district offices. There are separate boundary layers for program Intake boundaries, which are used to tell County residents which office to go to when applying for a particular program. There are also separate boundaries […]

LA County Sanitation Districts GIS Page

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The LA County Sanitation Districts are a partnership of 24 independent special districts that serve the wastewater and solid waste management needs of approximately 5.5 million people in Los Angeles County (County). The Sanitation Districts’ service area covers approximately 824 square miles and encompasses 78 cities and unincorporated territory within the County.

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Port of Los Angeles Berths, Docks, Slips

The Port of Los Angeles manages GIS information about its Berths, Marinas, docks, and slips. They have provided a set of feature classes, including:

Berth Lines Dock Lines Marina Boundaries Slips Dock Structures

You can see the organization of the data in the image on the right.

Download the Data

POLA_Data – […]

Historic Resources

This dataset contains a polygon layer of historic resources in Los Angeles County.

Data Download Link

Historic_Resources – Zipped ESRI shapefile

 

 

Electricity Transmission Lines – Southern California Edison

Southern California Edison’s Distributed Energy Resource Interconnection Map (DERiM) aims to connect developers with the SCE system data needed to enable strategic distributed energy resource siting.

SCE is continually looking for ways to improve DERiM data and customer experience. Stay tuned for additional map content!

Click here to open the DERiM application

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Specific Plans – Proposed

Specific Plan – Proposed

These are Proposed Specific Plans for the unincorporated areas of Los Angeles County. The adoption of the Antelope Valley Area Plan by the Board of Supervisors (6/16/15) introduced a new Specific Plan Boundary on the Land Use Policy maps for the Centennial project and other adjacent parcels. […]

Pest Detection – Statewide Trapping Grid (STG) QUINTS

The STG encompasses the entire State. This new grid system eliminates the problems of grids not aligning properly and duplication of numbers. Naming convention for the grid is alphanumeric. Columns are Alpha (A – UW) and rows are Numeric (001 – 656). The grid name is the combination of the column and row names. Naming […]

Pest Detection – Statewide Trapping Grid (STG) Grids

This new Statewide Trapping Grid (STG) grid system eliminates the problems of grids not aligning properly and duplication of numbers.

Naming convention for the grid is alphanumeric. Columns are Alpha (A – UW) and rows are Numeric (001 – 656). The grid name is the combination of the column and row names. Naming started in […]

Trees in LA County Parks

This dataset contains tree locations and information from 26 parks managed by the Los Angeles County Department of Parks and Recreation.

Data Download

LA County Parks – Trees (phases 1 and 2) – zipped shapefile Shapefile Metadata – pdf format LACO Park Trees Phases 1 and 2 – Excel Table […]

LA County CAMS Address Locator

From this post you can download an address locator customized for Los Angeles County, as well as the rules that build it.

The County of Los Angeles currently is able to confidently match over 98.8% of incoming addresses. This has been tested against approximately 9 million addresses composed of voters’ addresses, utility addresses, […]

Airports (Countywide)

Shows all airports in Los Angeles County. For a link to the Department of Regional Planning’s Airport Land Use Commission page, click here. UPDATED on 4/27/15 to reflect the name change from El Monte Airport to the San Gabriel Valley Airport

Download Shapefile (.zip)

View in the new LA County Open Data Portal […]

Zoning Map Grid

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 4/27/15 […]

Historic Maps of Los Angeles City (1849, 1908)

Two georeferenced images of historic maps of Los Angeles were downloaded from Earthworks, as posted by SoCalGIS. Since they were georeferenced I thought they might be of interest.

Many thanks to Harvard University Library for scanning and georeferencing these maps.

Click below to download

Map of Los Angeles (1849) […]

Solar Data Summarized to 2010 Parcels

With the release of the Local Roll to the public (see this data entry) we are now able to release the dataset that supports the LA County Solar Map (http://solarmap.lacounty.gov).

The Solar Map Database contains the results of the 2006 solar model (for details see this data […]

Injury Collisions in Los Angeles County (SWITRS) 2003-2012

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 was established by researchers […]

Proposed City Reorganizations (Annexations/Detachments)

City of Pomona- Annexation No.2015-09 (LAFCO No. 2019-01PR)The following table provides some information on “Proposed City Reorganizations” (Annexations/Detachments) within Los Angeles County which have been submitted to and accepted by “Local Agency Formation Commission of Los Angeles County” ( LAFCO) for processing. The main purpose of this webpage is to make […]

Assessor Parcels – 2014 Tax Roll

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 […]

Public Safety Answering Point Boundaries

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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 […]

USGS Faults

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

Click here to download the shapefile

Source

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 […]

NOAA Data Portals

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:

 

 

 

 

 

 

NOAA Digital Coast Data Registry, which is a national site (but you […]

US Forest Service Enterprise Data

If you are looking for data from the US Forest Service, you can go to their Enterprise Data download location. I recently downloaded the boundaries of the new San Gabriel Mountains National Monument from there.

Click here to access the site

They also make a number of web services available at

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 […]

L.A. County Land Types

Current date of the data: August 2015

The Land Types dataset is a public domain dataset managed by the County of Los Angeles which includes various types of land use that are critical for mapmaking and geographic analysis. The data has been created to match parcel boundaries where possible, and digitized from 4-inch aerial photography […]

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 […]

Countywide Building Outlines – 2014 – LARIAC 4

***NOTE***This new data is NOT public – you must be a member of LARIAC to access it.

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 […]

Population and Poverty Estimates

County of Los Angeles had loaded numerous 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 are proprietary estimates acquired by Los Angeles County for internal analysis. County departments and agencies […]

Substructure Maps

Substructure Maps Grid

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, […]

Stormwater Catchment Areas

 

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 […]

CalEnviroScreen 2.0

How polluted is your neighborhood?

The California Office of Environmental Health Hazard Assessment (OEHHA), on behalf of the California Environmental Protection Agency (CalEPA), provides CalEnviroScreen 2.0, a screening methodology that can be used to help identify communities that are disproportionately burdened by multiple sources of pollution.

To access these GIS applications, downloadable GIS […]

L.A. County Street & Address File

Starting in September 2014, the data will be uploaded every week on Sunday with the newest revisions from CAMS (Countywide Address Management 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 […]

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. […]