Contains shapefiles and tabular election and demographics data of California precincts.
.
├── README.md
├── analyses
├── coun
8000
ties
│ ├── alameda
│ │ ├── README.md
│ │ ├── processed
│ │ │ ├── georeferenced
│ │ │ ├── shp
│ │ │ └── tab
│ │ ├── raw
│ │ │ ├── jpg
│ │ │ └── shp
│ │ └── results
| ├── alpine
│ │ ├── README.md
│ │ ├── processed
│ │ │ ├── georeferenced
│ ... ... ...
├── geodata
│ ├── acs
│ │ ├── shp
│ │ └── tab
│ ├── census
│ │ ├── shp
│ │ │ └── 2010
│ │ │ ├── blocks.zip [not included because of large file size]
│ │ │ └── counties.zip
│ │ └── tab
│ │ └── 2010
│ │ └── blocks.zip
│ └── election
│ └── 2016
│ ├── federal
│ │ ├── house.zip
│ │ ├── president.zip
│ │ └── senate.zip
│ └── state
│ └── state.zip
└── scripts
└── extract.py
blocks.zip: Shapefile of 2010 California census blocks
- Retrieved June 2020 from the National Historical Geographic Information System (NHGIS) database's 2010 TIGER/Line+ basis
counties.zip: Shapefile of 2010 California counties
- Retrieved June 2020 from the NHGIS database's 2010 TIGER Line+ basis
state.zip: Shapefile of 2010 California state.
- Retrieved June 2020 from the NHGIS database
blocks.zip: Tabular demographics and VAP data of 2010 California census blocks
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Retrieved June 2020 from the NHGIS database's 2010_SF1a dataset
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Contains tables "Total Population" and "Hispanic or Latino, and Not Hispanic or Latino by Race for the Population 18 Years and Over"
/federal/president.zip: Tabular California precinct-level data for the 2016 United States Presidential election
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Retrieved June 20 from the MIT Election Data and Science Lab (MEDSL) database
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California-specific data extracted with
‘state_postal = CA’query
/federal/senate.zip: Tabular California precinct-level data for the 2016 Senate elections
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Retrieved June 20 from the MEDSL database
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California-specific data extracted with
‘state_postal = CA’query
/federal/house.zip: Tabular California precinct-level data for the 2016 House elections
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Retrieved June 20 from the MEDSL database
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California-specific data extracted with
‘state_postal = CA’query
/state/state.zip: Tabular California precinct-level data for 2016 state
elections
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Retrieved June 20 from the MEDSL database
-
California-specific data extracted with
‘state_postal = CA’query
Number of precincts and precinct names were retrieved June 2020 from...
Raster maps from the county's website were georeferenced in QGIS and then
used to outline precinct boundaries around which census blocks were
geographically merged. All maps have coordinate reference systems (CRS)
defined on EPSG:102003 (USA Contiguous Albers Equal Area Conic) for
georeferencing along the OpenStreetMap (OSM) standard. Additionally,
the Albers projection is the standard used by the US Census Bureau,
from which the geographic data comes. The maps are projected in
EPSG:3310 (NAD83/California Albers) for prioritizing geographic area.
The block-level and county-level shapefiles were joined to disaggregate county
names to blocks. The script can be found in the Jupyter Notebook script/join-blocks-counties.ipynb. The joined shapefile can be found in
geodata/census/shp/2010/blocks-counties-joined.zip.
Shapefile and tabular data joins were done using python. The documented script can be found in the Jupyter Notebook ...
Census-block-level demographics geodata were aggregated into precinct-level election geodata using the python maup package. The documented script can be found in the Jupyter Notebook ...
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alameda_precincts.zip -
alameda_blocks.zip
More detailed analyses can be found in analyses/.
Note: Because of the immigration history and the election requirements of the United States, not all in the Hispanic voting age population (HVAP) nor all in the Asian voting age population (ASIANVAP) are citizens. Consequentially, not all in the HVAP nor in the ASIANVAP are permitted to vote in United States federal elections. Therefore, any ecological regression (ER) or ecological inference (EI) analyses using HVAP or ASIANVAP lack statistical accuracy. It is better to use HCVAP and ASIANCVAP for analysis purposes.
The columns names used in the geodata follow the Metric Geometry and Gerrymandering Group (MGGG) naming conventions.
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PRES16C: Votes for the Constitution candidate in the 2016 United States Presidential Election -
PRES16D: Votes for the Democratic candidate in the 2016 United States Presidential Election -
PRES16R: Votes for the Republican candidate in the 2016 United States Presidential Election -
PRES16L: Votes for the Libertarian candidate in the 2016 United States Presidential Election -
PRES16G: Votes for the Green candidate in the 2016 United States Presidential Election
Coming soon...
Coming soon...
Coming soon...
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TOTPOP(H7Z001): Total population -
NH_WHITE(H7Z003): White, non-Hispanic alone population -
NH_BLACK(H7Z004): Black, non-Hispanic alone population -
NH_AMIN(H7Z005): American Indian and Alaska Native, non-Hispanic alone population -
NH_ASIAN(H7Z006): Asian, non-Hispanic alone population -
NH_NHPI(H7Z007): Native Hawaiian and Pacific Islander, non-Hispanic alone population -
NH_OTHER(H7Z008): Other race, non-Hispanic alone population -
NH_2MORE(H7Z009): Non-Hispanic population of two or more races -
HISP(H7Z010): Total Hispanic/Latino population -
H_WHITE(H7Z011): White, Hispanic alone population -
H_BLACK(H7Z012): Black, Hispanic alone population -
H_AMIN(H7Z013): American Indian and Alaska Native, Hispanic alone population -
H_ASIAN(H7Z014): Asian, Hispanic alone population -
H_NHPI(H7Z015): Native Hawaiian and Pacific Islander, Hispanic alone population -
H_OTHER(H7Z016): Other race, Hispanic alone population -
H_2MORE(H7Z017): Hispanic population of two or more races
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VAP(H75001): Total voting age population -
HVAP(H75002): Hispanic voting age population -
WVAP(H75005): White, non-Hispanic voting age population -
BVAP(H75006): Black, non-Hispanic voting age population -
AMINVAP(H75007): American Indian and Alaska Native, non-Hispanic voting age population -
ASIANVAP(H75008): Asian, non-Hispanic voting age population -
NHPIVAP(H75009): Native Hawaiian and Pacific Islander, non-Hispanic voting age population -
OTHERVAP(H75010): Other race, non-Hispanic voting age population -
2MOREVAP(H75011): Voting age population of two or more races