Geographic Information System (GIS) Mapping Technology
Citizen "Planners" are gaining access to electronic resources.
Data Downloads and Viewers - GIS, KML, ShapeFiles, CSV, and more ...
Open Source: www.OpenStreetMap.org, Google Earth, Google My Maps, more ...
Local SoCal GIS Meeting website and it's long list of government related download sites.
LA City Resource File Sample Snapshots
School Campuses (LAUSD) KML