Caltrans GIS Data

Caltrans Districts

Caltrans Adjusted County Boundaries

Caltrans Adjusted Boundaries is a culmination of both Tiger Line Boundary data and the Calfire County Boudnary data.

Last Modified: September 8, 2017


The Caltrans Adjusted Boundary Polygons dataset is a polygon representation of the county boundaries within California. This dataset takes geometry from both Tiger lines and Calfire county lines in order to preserve the Linear Referencing for the CRS and SHN datasets. The dataset uses Tiger lines everywhere except where the SHN crosses the county lines. Where the SHN crosses county lines, Calfire boundaries are used.


The TIGER/Line Shapefile products are not copyrighted however TIGER/Line and Census TIGER are registered trademarks of the U.S. Census Bureau. These products are free to use in a product or publication, however acknowledgement must be given to the U.S. Census Bureau as the source. The boundary information in the TIGER/Line Shapefiles are for statistical data collection and tabulation purposes only; their depiction and designation for statistical purposes does not constitute a determination of jurisdictional authority or rights of ownership or entitlement and they are not legal land descriptions.Coordinates in the TIGER/Line shapefiles have six implied decimal places, but the positional accuracy of these coordinates is not as great as the six decimal places suggest.


Tags: County Boundaries, Caltrans, Adjusted Boundaries, Boundaries, California
Credits: California Department of Transportation (Caltrans), The Department of Foresty and Fire Protection (Cal Fire), U.S. Census Bureau Tiger Products
File: Caltrans Adjusted County Boundaries:, size 3.354 MB
Extent: California statewide
References: Caltrans Districts and County Boundary Map includes Counties within each District and District Contact Information:
Caltrans Districts and County Boundary Map