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.
2010 Census Blocks by 2011 District files
ZIP codes by 2011 District files: ZIP codes by the new 2011 Assembly, Senate, and Congressional districts. Based on the total number of registered voters' addresses with a
given ZIP code that have been geocoded to the district over the total numbers of registered voters with that ZIP code.
2008 General Election SR Precincts by 2011 Districts file: In instances where a precinct was split over districts,
the precinct was assigned to the district that had the largest number of occurrences of the srprec.
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