Recent Releases

Log In

2006 2-foot contours – LARIAC

***NOTE***The data is held under license from InfoTech International, and cannot be publicly released.

2 foot contours acquired as part of the Los Angeles Regional Imagery Acquisition Consortium in 2006.

The Digital Surface Model was acquired using LIDAR (Light Detection And Ranging), which used a laser mounted in planes that were acquiring 4-inch orthophotography data.  Hundreds of millions of ground measurements were made using this system, which makes it  extremely accurate.  This source was used for urban/suburban areas of the County in mainland (approximately 2,898 square miles) and Catalina Island covering approximately 75 square miles, while for the National Forest contours were created using stereo compilation.

This dataset meets or exceeds ASPRS (American Society for Photogrammetry and Remote Sensing) 1:100 scale mapping.  Accuracy is within +/- 2 feet of true location with 95% confidence.

Detailed product information is contained in the LARIAC Product Guide.

We highly recommend that you visit the LARIAC Project Website to find a rich source of information about the data and the LARIAC program.  The site includes project documents, full FGDC compliant metadata, data downloads of related GIS used to complete the project, sub-licensing information, sample imagery and data, and information about the 2006 acquisition.

GIS Data showing flight-date information is available from the LARIAC Project website site, and elsewhere in the LA County GIS Data Portal.

The data is held under license from InfoTech International, and cannot be publicly released.  Government entities are eligible to join the LARIAC program to access the data.  Private entities may contact InfoTech directly to purchase selected parts of the data.

Data Access

Please note that this data is not available to the public.  The USGS has a public, 10 foot  foot version of the Digital Elevation Model

For County staff only, use the layer file below, which has symbology and data access:

Samples

About LAR-IAC

The Los Angeles Region Imagery Acquisition Consortium (LAR-IAC) Program is a collaborative acquisition program for digital aerial imagery data which has included the participation of 10 County departments, 30 municipalities, and four other public agencies.

The consortium is a model for regional cooperation that improves the quality, access, and cost-effectiveness of high resolution digital aerial imagery. Knowledge transfer is increased through consortium program meetings, user groups, and various workshops that have been established in conjunction with the project. The imagery acquired will enable all participating jurisdictions to leverage this key geographic information asset for numerous decision support and business applications, thereby facilitating the effective and efficient delivery of services.

Purchasing LAR-IAC data

Government agencies acquire LAR-IAC elevation data only through the County consortium.  Private companies can acquire LAR-IAC data as part of a project they are working on with a LAR-IAC consortium member. 

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

GIS Source Information
Database Name: AERIAL
Feature Class Name: LARIAC_CONTOURS_2FOOT
Feature Dataset Name (if applicable):
Reference Date: 2006
Accuracy: Parcel
Update Frequency: Other
Access Constraints:Licensed

Contact Information
Christine Lam
Principal GIS Analyst
County of Los Angeles
Internal Services Department



CLam2@isd.lacounty.gov

Leave a Reply