Wisconsin PL 94-171 Race Data Aggregated to 2020 Zip Code Tabulation Areas (ZCTAs)

## Redistricting Data Hub (RDH) Retrieval Date
02/03/2023

## Sources
[Wisconsin block PL 94-171 2020 from the RDH](https://redistrictingdatahub.org/dataset/wisconsin-block-pl-94171-2020/)
[2020 ZCTA Block Assignment file from the US Census](https://www2.census.gov/geo/docs/maps-data/data/rel2020/zcta520/tab20_zcta520_tabblock20_natl.txt)

## Fields
COUNTY_ZCTA	County - 5-Digit Zip Code Tabulation Area (ZCTA)
COUNTY		County Name
COUNTYFP20	County FIPS
ZCTA			5-Digit Zip Code Tabulation Area (ZCTA)
TOT_POP20		Total population (P0020001)
HSP_POP20		Hispanic or Latino population (P0020002)
WHT_POP20		White alone population (P0020005)
BLK_POP20		Black or African American alone population (P0020006)
AIA_POP20		American Indian and Alaska Native alone population (P0020007)
ASN_POP20		Asian alone population (P0020008)
HPI_POP20		Native Hawaiian and Other Pacific Islander alone population (P0020009)
OTH_POP20		Some Other Race alone population (P0020010)
2OM_POP20		Two or more races population (P0020011)
TOT_VAP20		Total voting age population (P0040001)
HSP_VAP20		Hispanic or Latino voting age population (P0040002)
WHT_VAP20		White alone voting age population (P0040005)
BLK_VAP20		Black or African American alone voting age population (P0040006)
AIA_VAP20		American Indian and Alaska Native alone voting age population (P0040007)
ASN_VAP20		Asian alone voting age population (P0040008)
HPI_VAP20		Native Hawaiian and Other Pacific Islander alone voting age population (P0040009)
OTH_VAP20		Some Other Race alone voting age population (P0040010)
2OM_VAP20		Two or more races voting age population (P0020011)

## Processing Steps
Load in ZCTA BAF from the Census and PL data and join together.
Query PL data to the fields listed above and rename.
For blocks where the ZCTA assignment is null, assign 'NO ZCTA'.
Retrieve county name (using FIPS) from the Census.
Group data by ZCTAs for each county to aggregate block level data to ZCTAs. 
*Please note that this means that ZCTAs which cross counties would only be shown in partiality and not for the entire ZCTA.*


##Additional Information
Visit the RDH GitHub and the processing script for this code [here](https://github.com/nonpartisan-redistricting-datahub/Processing-Requests/tree/main/Wisconsin_PL_ZCTA_02_01_2023)
Please direct questions related to processing this dataset to info@redistrictingdatahub.org.