Georgia 2018 to 2020 Precinct Crosswalks

## RDH Date retrieval
11/16/2022

## Sources
[2020 General Election Results Disaggregated to 2020 Census Blocks](https://redistrictingdatahub.org/dataset/georgia-2020-general-election-results-disaggregated-to-the-2020-block/)
[2018 General Election Results Disaggregated to 2020 Census Blocks](https://redistrictingdatahub.org/dataset/georgia-2018-general-election-results-disaggregated-to-the-2020-block/)
[VEST 2018 Precinct Boundaries and Election Results](https://redistrictingdatahub.org/dataset/vest-2018-georgia-precinct-and-election-results/)  

## Fields
Precinct ID 2018 - 2018 Precincts Unique ID
Precinct ID 2018 - 2020 Precincts Unique ID
Population ratio - Ratio of modified VAP population from 2018 in 2020 precinct

## Processing Steps
Download block-level disaggregated 2018 and 2020 Georgia precinct elections data
Groupby 2018 precinct and track the different 2020 precinct assignments for all the blocks assigned to a given 2018 precinct.
In cases where there are multiple 2020 precinct assignments for blocks with the same 2018 precinct assignment, create a ratio using VAP mod (total population minus adult incarcerated population)
Remove instances where VAP mod ratio is zero.
Export to the users desired format of a three-column dataframe.

##Additional Information 
For more information please contact info@redistrictingdatahub.org or view the processing script on our GitHub[https://github.com/nonpartisan-redistricting-datahub/Processing-Requests/tree/main/Georgia_Precinct_Crosswalk_11_15_2022]