California Department of Transportation

Geographic Information System (GIS)

GIS is a computer based system that contains information about the world that has been
abstracted and simplified into a digital database of spatial and nonspatial features. It
permits the capture, maintenance, retrieval, integration, visualization and analysis of
georeferenced data. “GIS allows us to view, understand, question, interpret, and visualize
data in many ways that reveal relationships, patterns, and trends in the form of maps,
globes, reports, and charts.”

California's counties, universities and state departments have been utilizing GIS to create
geographic references of the most current and accurate parcel data of their counties. For
further information, take a look at what they're doing:

California GIS Map and Information Sites by Coordinated Legal Technologies
This site lists all of the counties that are currently utilizing GIS and GIS Interactive
Mapping tools throughout California

Humboldt State University Library, Digital Spatial Data of the world, California,
California (Northwestern) and the United State

University of California, Berkeley, GIS in the Earth Sciences and Map Library

Legal Services of Northern California, GIS Mapping Resources
This site provides links to those Northern California counties utilizing GIS

Merced County Association of Governments

Southern California Association of Governments

Calaveras County Geographic Information Systems