Cellmander

Spatial gerrymandering test for robust cell typing and cell segmentation

Data

Voting district data from 2020 Census

Hawaii and Alaska are omitted from the plot to preserve map contiguity. California and Oregon opted out of voting district data reporting. Their districts can be constructed from census block level data. Red points indicate geographical centroid of each voting district.

Voting record data from the ALARM project

Results

Minnesota 6 district proposal. 1000 ReCom MCMC steps, sampled at 5 step intervals

Simulated election outcomes using 2020 Presidential Election vote counts

Configurations of a single district

References

• ALARM Project: curation of US voting district maps & analysis
• Friedman and Holden, 2008. Optimal Gerrymandering in a Competitive Environment.
• DeFord, Duchin, and Solomon, 2019. Recombination: A family of Markov chains for redistricting.
• gerrychain: MCMC-based districting package. [docs]

TODO:

1. implement ReCom based MCMC sampling on voting using the GerryChain implementation.
2. implement ReCom on sample ST data
3. GPU speedup of ReCom if no package is available
4. Gene count vector based reweighing of partitions