The #1 search on this site is for GIS Data. I finally had the time to put together a list of LA County’s data download sites:
LA County has a number of GIS Data locations where you can look through the County’s GIS Data, download shapefiles and various other GIS formats. Some of the data is free, some of it cannot be shared because it is licensed, but it is important for us to at a minimum develop and share the full scope of the County’s GIS Data.
|LA County Data Portal The LA County GIS Data Portal is a rapidly growing resources where you can download shapefiles and get information about the County’s data holdings.Click here to open|
|Assessor The Assessor sells its parcel data at low cost. You will need both the Parcel Base Map and the Formatted Data
|Public WorksThe Department of Public Works’ Spatial Information Library has a number of free data layers as well.Click here to open|