alarm-redist / fifty-states

Redistricting analysis for all 50 U.S. states
https://alarm-redist.github.io/fifty-states/
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2020 Rhode Island Congressional Districts #72

Closed mzwu closed 2 years ago

mzwu commented 2 years ago

Redistricting requirements

In Rhode Island, according to the Rhode Island Laws, Chapter 100, Section 2 districts must:

  1. be contiguous
  2. have equal populations
  3. be geographically compact
  4. preserve state senate district boundaries as much as possible

Interpretation of requirements

We enforce a maximum population deviation of 0.5%. We add a VRA constraint targeting one minority opportunity district.

Data Sources

Data for Rhode Island comes from the ALARM Project's 2020 Redistricting Data Files. Data for the 2022 Rhode Island enacted congressional map comes from the American Redistricting Project.

Pre-processing Notes

No manual pre-processing decisions were necessary.

Simulation Notes

We sample 5,000 districting plans for Rhode Island. We assigned state senate districts to act like counties so that the simulations minimize the number of senate district splits.

Validation

validation_20220303_1901_sd_vra2

Checklist

Additional Notes

Validation plot for number of state senate district splits. image

@CoryMcCartan