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Reorganization No. 2016-08 ( Detachment from the City of Monrovia , Annexation to the City of Bradbury)

Reorganization No. 2016-08 to the City of Bradbury became effective January 11, 2018. To download the shapefile of the detachment/annexation boundary, click on the link below. This shapefile download includes territories detached from the City of Monrovia and annexed to the City of Bradbury. Overlapping polygons indicate territories that transferred between cities.

Reorganization No. […]

Landscape Maintenance Districts Zones

This layer contains the boundaries for all of the Landscape Maintenance District Zones in the unincorporated LA County.

A Landscape Maintenance District is a special district formed to provide benefiting property owners the opportunity to pay for enhanced landscaping and appurtenant improvements, maintenance, and services beyond those generally provided by the County.

 

Background

The […]

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 […]

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, […]

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 […]

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 […]

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 […]

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 […]

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

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.