The Los Angeles County Department of Public Works provides a Spatial Information Library for CAD and GIS data. The data is not loaded from this Data Portal, but can be viewed by visiting the link below.
Spatial Information Downloads
Download GIS files in ArcView shapefile format and examine their metadata.
Search using an address, street intersections or thomas guide pages. Navigate to a desired location with the zoom tool to download our house numbering and index maps in microstation design file format (DGN). Locate multiple DGN files for a specific region.
Some layers included (this is not an exhaustive list): catch basin retrofits, governmental units, hydrography, soil types, sewer, storm drains and street lights.
Click here for the Department of Public Work’s Spatial Information Library.