Log In

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.

Each block measures 2,000 meters by 2,000 meters and are comprised of four 1,000 meter/1 kilometer USNG blocks. i.e. 11SLT4771, 11SLT4871, 11SLT4770 and 11SLT4870; left to right and up to down. For ease of use each 2,000 meter block is designated by a page number from 1 to 9,750, and it is inferred that the 1,000 meter divisions of each page are designated A, B, C or D; left to right and up to down. Therefore each 1,000 meter block within this regional grid has a unique descriptor of 4 numerals and 1 letter.

The region covered by the grid includes Los Angeles County completely and 2 of the islands in the Channel Islands archipelago that fall into the Los Angeles County jurisdiction. It also covers close to 100% of Orange County, 50% of Ventura County, and the Los Angeles County adjacent portions of Kern County, San Bernardino County and Riverside County, and a portion of Marine Corps Base Camp Pendleton in Northwest San Diego County.

Click here for shapefiles

Using GIS Data on this site

GIS Data downloaded from this site generally requires GIS software to view. Click here for a list of GIS Data Viewers

GIS data available on this website is provided AS IS - please read the GIS Data Portal Terms of Use

Data Field Descriptions

PAGE = Grid Number

GIS Source Information
Database Name: eGIS_Basemaps_Grids
Feature Class Name: FIRE_MAP_INDEX
Feature Dataset Name (if applicable):
Reference Date: 2016
Accuracy: Other
Update Frequency: As Needed
Access Constraints:None

Contact Information
Los Angeles County
Fire Department
Information Management Division
Geographic Information Systems Section
5847 Rickenbacker Road
Commerce, CA.

Leave a Reply