2020 Iowa precinct and election shapefile.

## RDH Date retrieval
06/10/2021

## Sources
Election results from Iowa Secretary of State (https://sos.iowa.gov/elections/results/index.html)
Precinct shapefile primarily from IA Secretary of State (https://sos.iowa.gov/shapefiles/)

The following counties instead use shapefiles sourced from the respective county governments: Dallas, Dubuque, Johnson, Linn, Polk, Pottawattamie, Scott, Story. 
The following counties were aligned with updated municipal boundaries from the U.S. Census Bureau's 2020 Redistricting Data Program: Marion, Muscatine, Woodbury. 
Mitchell County was edited to match the revised 2020 precinct map from the county.

## Fields metadata

Vote Column Label Format
------------------------
Columns reporting votes follow a standard label pattern. One example is:
G16PREDCli
The first character is G for a general election, P for a primary, S for a special, and R for a runoff.
Characters 2 and 3 are the year of the election.
Characters 4-6 represent the office type (see list below).
Character 7 represents the party of the candidate.
Characters 8-10 are the first three letters of the candidate's last name.

Office Codes
ATG - Attorney General
AUD - Auditor
COC - Corporation Commissioner
COU - City Council Member
DEL - Delegate to the U.S. House
GOV - Governor
H## - U.S. House, where ## is the district number. AL: at large.
INS - Insurance Commissioner
LTG - Lieutenant Governor
PRE - President
PSC - Public Service Commissioner
SAC - State Appeals Court (in AL: Civil Appeals)
SCC - State Court of Criminal Appeals
SOS - Secretary of State
SPI - Superintendent of Public Instruction
USS - U.S. Senate

Party Codes
D and R will always represent Democrat and Republican, respectively.
See the state-specific notes for the remaining codes used in a particular file; note that third-party candidates may appear on the ballot under different party labels in different states.

## Fields
G20PRERTRU - Donald J. Trump (Republican Party)
G20PREDBID - Joseph R. Biden (Democratic Party)
G20PRELJOR - Jo Jorgensen (Libertarian Party)
G20PREGHAW - Howie Hawkins (Green Party)
G20PRECBLA - Don Blakenship (Constitution Party)
G20PREOFUE - Roque Rocky De La Fuente (Alliance Party)
G20PREOKIN - Ricki Sue King (Genealogy Know Your Family History Party)
G20PREIWES - Kanye West (Independent)
G20PREIPIE - Brock Pierce (Independent)
G20PREOWRI - Write-in Votes

G20USSRERN - Joni Ernst (Republican Party)
G20USSDGRE - Theresa Greenfield (Democratic Party)
G20USSLSTE - Rick Stewart (Libertarian Party)
G20USSOHER - Suzanne Herzog (Independent)
G20USSOWRI - Write-in Votes

## Processing Steps
The following precincts were merged to match the 2020 general election results.

Appanoose: Udell/Union
Black Hawk: Cedar Falls W2P2/Cedar Falls Twp
Cass: Atlantic 1/BR-GV-WS-PY, Atlantic 2/3, 4/5, BN-FR/GN-LN
Davis: Bloomfield 1/2/3
Des Moines: Burlington 1/Tama, Burlington 8/Concordia
Fremont: Hamburg/Washington, Farragut/Shenandoah1
Henry: Mt Pleasant 1/2/3/4
Howard: Cresco 1/2/3
Lee: Fort Madison 4A/4B, Keokuk 2A/2B, FCM/Harrison
Mitchell: Precinct 1/12, 3/10/11, 5/6, 7/8/9
Polk: Grimes 2/Urbandale 12
Tama: Toledo 1/2/3