Each redistricting dataset merges the electoral data the SWDB collected and processed over the preceding decade with the most current census data (PL94-171). The result is a census block level dataset that allows for longitudinal analysis of electoral data over time on the same unit of analysis. Electoral data consist of the Statements of Vote (SOV) and Statements of Registration (SOR) for each statewide election. These data are collected from the Registrars of Voters for each of the 58 California counties with each election.
The SWDB collects the Statement of Vote and the Statement of Registration along with various geography files from each of the 58 counties for every statewide election. The Statement of Vote is a precinct level dataset and precincts in California change frequently between elections. The goal of the SWDB is to make election data available that can be compared over time, on the same unit of analysis – a precinct, a census block or a census tract.
This is a page containing links to all of the available precinct geographic files in the Statewide Database. They are available for the time being only in Mapinfo Interchange format, on a county-by-county basis, as self-extracting archives. It is possible to import Mapinfo Interchange files into both Maptitude and ArcGIS applications. Here are instructions for importing Mapinfo files into ArcGIS from the ESRI support website.
Below you will find a matrix of election and precinct type, with a list of counties in each box. Click on the county number in which you are interested to download the corresponding geography.
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