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.
The Presidential Series is an on-going mapping project at the
Statewide Database. The voting returns for the three major
candidates in the presidential election of 1992 (Bush, Clinton
and Perot) are mapped to the census block level. The maps
are broken down first by Assembly District (AD), and then further
detailed in slices of the AD by county (and in most
cases, those county slices are further detailed with 'zooms' of
highly populated regions...Be sure to scroll down under
each map for links to detail maps).
The project started out as a check of our geography and label
files, and to make sure that our data are complete and mapable
for the 2001 redistricting. Breaking down the Statement of
Vote (SOV) from the precinct level on which results are reported
to the smaller block level also exemplifies one of the unique
features of this database. The presidential series is created
with an in-house geographical information system named DGX
or Demographix. For each map, the geography
is loaded, and the street labels are individually placed. Then,
the data are mapped into the geography, using the same color file
for each map. The entire process of creating one map takes
on average about two hours.
We quickly realized that the presidential series had other
applications in addition to those outlined above. Students,
for example, use these maps to study voting behavior and as a
baseline for research projects, and we are able to respond
to many requests for maps quicker now that label files for the
districts have been created.
Currently, about 80 percent of this project has been completed and each
district is uploaded whenever all parts, including the detailed maps,
are finished. We always appreciate feedback, so please let us know
if you find this project useful.
We would love to help. Please leave us a message and we will get right back to you: