City Annexations
This layer contains information for locating past and present legal city boundaries within Los Angeles County. These City Annexation polygons are used for city boundary analysis, retrieval of land records, and general cartographic purposes. The data is based on the Los Angeles County Seamless Cadastral Landbase, which is jointly maintained by the Los Angeles County Assessor and the Los Angeles County Department of Public Works. (This annexation apping is mostly complete, except for some ocean polygon features.
Download data from the DPW GIS Data Site
The Los Angeles County Department of Public Works(DPW) provides a current shape file of the City annexations at its GIS Data Site:
To see the disclaimers, see: http://dpw.lacounty.gov/general/spatiallibrary
Annexation Maps
DPW also provides city annexation maps (in pdf), for download at its FTP site. A rigorously maintained shapefile representing current city boundaries is also available at this Data Portal.
Download a sample (Glendale Annexation Map).
Sample