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California Street Name Lookup

Download: streetz.zip

Brief How-To: california_street_name_lookup

Misspelled street names are a major cause of geocoding errors. This simple tool provides a current list of street names from all over California that you can look up by street name, ZIP Code, or postal city. This download includes a SQLite database (streets.db) and a […]

ZIP Code Boundaries

Parcel Specific Zip Codes Sample

There are two ZIP Code boundary shapefiles – one that follows parcels and one that follows street based data better. There is also a line version of the ZIP Codes and ZIP Code centroids included here as well. One lines up with parcel lines and […]

OpenStreetMap (OSM) California Downloads

Download: OSM California Streets, etc. (Geofabrik)

Download: OSM Land Polygons (Jochen Topf and Christoph Hormann)

OpenStreetMap (OSM) is built by a community of mappers that contribute and maintain data about roads, trails, cafes, railway stations, and much more, all over the world. Luckily, Geofabrik, a German-based consulting firm regularly […]

LA County CAMS Address Route Markers & Landmarks

Point locations of route/mile markers and landmarks that are maintained within the Countywide Address Management System (CAMS).

DISCLAIMER: This is not a complete inventory of Route Markers or Landmarks within the County of Los Angeles.


Click here to download CAMS Route Market data.

Click here to download CAMS Landmark data.

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, […]

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 […]

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 […]

LA County’s Unified House Numbering System

After 11 years in the County, and many years dealing with addresses, I just learned about our Unified House Numbering System guidelines, which points to all of the relevant source information that we use to assign house numbers in the Unincorporated portion of the county. Many cities were incorporated after this was adopted in […]

Santa Monica GIS Data

For folks who are looking for GIS data in the City of Santa Monica, they have a page where they make this data available for download:

Click here to go to the Santa Monica GIS Data Page

L.A. County Address Points

Address Points

Current data date: August 2014 – Data is automatically updating information weekly. For more information please visit the Countywide Address Management System page.

This dataset contains address points from the Countywide Address Management System (CAMS), a collaborative program between the County’s Registrar/Recorder, Chief Information Officer, […]

LA County Specific Locators and Matching Rules

Note – this is NOT a data download, it is a highly post, with downloads enabling GIS professionals with ESRI’s ArcGIS Software to embed enhanced geocoding rules into ESRI software for improving matching rates.

LA County currently is able to match over 99.5% of incoming addresses. Part of this has to do with the high […]

2010 TIGER Roads

The TIGER road file is a street centerline network used by the US Census Bureau to help locate and find citizens during its decennial census.

Historically this file has had a number of identified issues with its geographic accuracy, but the 2010 file has been tested by LA County and found to be highly accurate […]