Supervisorial District Boundaries for LA County for 1971, 1981, and 1991.
Samples (click to enlarge)
The data from 1991 was provided by the Registrar/Recorder.
The data from 1971 and 1981 was digitized from scanned and rectified County Engineer maps provided by the Department of Public Works.
- Download the Ortho rectified 1971 County Engineer’s Map (zipped geo-tiff)
- Download the Ortho rectified 1981 County Engineer’s Map (zipped geo-tiff)
|Engineer Maps (click to Enlage)|
Download/Access the GIS Data
Each of the files below contains all three supervisorial district boundaries in one file
- Historical Supervisorial Districts (ArcGIS 10 Layer File) - For LA County staff with direct access to the Enterprise GIS Repository.
- historic_supervisorial_districts (zipped shapefiles).