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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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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 download […]

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 […]

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 […]

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.

US National Grid

The United States National Grid is a nonproprietary alphanumeric referencing system derived from the Military Grid Reference System (MGRS) that is being promoted to increase the interoperability of location services appliances with printed map products by providing a nationally consistent grid reference system.

The purpose of the USNG according to the FGDC, is to “create […]

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 […]

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 […]

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 […]

Township Range Section, Rancho Boundaries

This dataset contains the boundaries of the Public Land Survey System (PLSS) – Township Range Section boundaries, as well as the boundaries of the Ranchos and Landgrants that pre-dated the PLSS. In general these match the USGS topographic Quad Sheets from the US Geological Survey.

Note – some boundaries […]

Los Angeles County Sanitary Sewers

The Consolidated Sewer Maintenance District (CSMD) of Los Angeles County is administered by the County of Los Angeles Department of Public Works (DPW).

For the list of cities served, operational maps, or for more information about the CSMD, please visit the November 7th, 2013 | Tags: , , , , | Category: Basemaps and Grids, Free, Infrastructure, Public Works | 2 comments

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.

 

Early Historic Surveys

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 […]

Township, Range and Section

The grid that shows the township, range and section information for Los Angeles County taken from the PLSS.

The Public Land Survey System (PLSS) typically divides land into 6-mile-square townships, which is the level of information included in the National Atlas. Townships are subdivided into 36 one-mile- square sections. A section is an area normally […]

US Geological Survey (USGS) Topographic Maps

Layering

The US Geological Survey has made its standard topo maps available for download through The National Map Viewer. NOTE – through research I have found that the USGS topo Store is a better place to go to download the maps. Click here to go to the store

There are […]

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 […]

DPW Index Map Grid

Abstract: This is the grid used to create the Los Angeles County cadastral database. The grids are 15,000 feet high and 20,000 wide. Purpose: Base map for the cadastral database

Download Data

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House Numbering Map Grid

Abstract: Each grid in the Index Map was divided into 25 grids to create the House Numbering (HN) Map. The grids in the HN map are 3000 ft high and 4000 ft wide. The Mat_No refers to the House Numbering Grid and the IM_No refers to the Index Map grid. Purpose: Base map for […]

Zoning Index Map Grid

Zoning Index Map Grid

The grid that shows the zoning index maps that cover the unincorporated areas of Los Angeles County. These maps are a conglomorate of 25 zoning maps and have less detail on them. This grid follows alignment and numbering system as the Department of Public Works House Number […]