Closed taransamarth closed 1 year ago
It's hard to see, but there's a singular ring around the entirety of O'ahu such that it generally encircles the Honolulu-centered district -- I'm pretty sure it's water, but I can't actually figure out which tract it is to make sure. Below is from the Honolulu submap with the 2010 enacted plan.
@taransamarth This looks good! Thanks for pointing out the geography question. Could you try plotting with geom_sf_label()
to take a look at the GEOID of that ring area? It looks like water (and hopefully 0 population), but good to be safe.
Yep, looks like it has no population! (filtered the map down to all tracts with pop == 0 and that ring is clearly there)
Redistricting requirements
Per Hawaii Revised Statutes 25-2(b)(1)-(4) and (6), as in force for the 2010 cycle, districts must:
1. not unduly favor any person or party;
2. be contiguous, except when encompassing more than one island;
3. be compact;
4. where possible, follow geographical and recognized features and coincide with tract boundaries;
6. where practicable, avoid mixing regions with different socioeconomic interests.
Algorithmic Constraints
We enforce a maximum population deviation of 0.5%. We use Census tracts in line with 25-2(b)(4). In absence of regional knowledge about features and socioeconomic interests, we use municipalities to attempt to enforce 25-2(b)(4) and (6).
Data Sources
Data for Hawaii comes from the ALARM Project's 2010 Redistricting Data Files.
Pre-processing Notes
Islands are manually connected in the adjacency graph, but this has no bearing on the simulation.
Simulation Notes
We sample 5,000 districting plans for Hawaii over 2 independent runs of the SMC algorithm. We use partial SMC to draw one district in the contiguous portion of Honolulu County and assign the remainder to district 2.
Validation
Checklist
TODO
lines from the template code have been removedenforce_style()
to format my coderedist_map
andredist_plans
objects, and summary statistics) have been edited@tylersimko