California Department of Transportation

Caltrans Earth Overview

Notice to users

The map display in Caltrans Earth uses the Google Earth Application Program Interface (API) and Google Earth Plug-In software. Google announced they will be retiring their API and Plug-In software on December 12, 2015. Google stated that these components were developed on an older technology (NPAPI) which is determined to be a security risk. There are no announcements from Google about continuing these products and services using other technology platforms.

In the meantime, as Google Chrome, Internet Explorer and Mozilla Firefox internet browsers continue releasing their own software upgrades, users are beginning to experience diminishing support for the Google technology components of Caltrans Earth.

Currently we are determining the future direction and evolution of Caltrans Earth as a web-based spatial data access solution. The Caltrans Earth website ( will be updated as events occur.

For the time being, we recommend using Caltrans Earth in Internet Explorer 11

If you have any questions regarding Caltrans Earth, please email us at


Caltrans Earth Links

  • Overview
    • The Division of Research, Innovation and System Information (DRISI) provided a new generation of web-based data access for sharing and viewing tools through the Google Earth and API Web Page. This is still viewable in Internet Explorer 11 only. However, Google announced they will be retiring their API and Plug-In software on December 12, 2015, and the Geospatial Enterprise Operations Branch is working on new web services for sharing data with the public.

  • Map Layers
    • Caltrans Earth is no longer being updated, since the Google Earth Plug-In was retired on December 12,2015. Caltrans GIS Data Layers can be found:

    • Caltrans Web Map Gallery      A series of California-focused transportaion themes on ArcGIS Online for the public.
    • Caltrans GIS Data Library       We provide downloadable GIS data created by Caltrans in zipped shapefile format.
  • Map Help
  • GIS Map Catalog
    • Map Catalog is a gallery of GIS maps provided - Including:

      Caltrans Earth, California Road System (CRS) Maps

    • Caltrans GIS Map Catalog
Last Update: November 13, 2017