Auto-Redistrict

Redistricting method comparison - U.S. Congress (work in progress)

Click here to see a comparison of current districts, compact districts, and multi-member districts for all 50 states designed by Auto-Redistrict.

Please note this is a work in progress. There are a few states missing right now, and a few stats where the data wasn't clean, that'll take a bit of TLC (tender loving and care) to bring up to presentation quality.

All 50 states for FairVote.org

Click here to see multi-member districts for all 50 states designed by Auto-Redistrict.

Per request from FairVote.org, I used Auto-Redistrct to design fair multi-member maps for all 50 states.

Data sheets by state

State	Auto-Redistrict map			Current map
	Datasheet	Seats/votes	Gerrymandered?	Datasheet	Seats/votes	Gerrymandered?
Maryland	congress		No	current		Pro-DEM
North Carolina	congress		No			Pro-REP
Ohio	congress		No	current		Pro-REP
Virginia	congress		No	current		Pro-REP

Side-by-side comparisons

Virginia
Wisconsin
Ohio
Florida

VI Congress

shapefile
starting data

category	measure	current map	autoredistrict map	difference	success?
compact	isoperimetric quotent	0.175973199	0.459268649	0.283295451	winner
contiguous	disconnected population	367,759	0	367,759	winner
population	population imbalance %	0.553316662	0.977712943	0.424396281	incomparable*
proportional	representation imbalance bits	0.117246937	0.008118395	-0.109128542	winner
equal	voting power imbalance bits	0.01473428	0.001536742	-0.013197538	winner
competitive	wasted votes	260,883	139,467	-121,416	winner
competitive	avg. PVI	9.523864893	4.888294644	-4.635570249	winner
competitive	elections w/in 5% PVI	1	6	5	winner
equal	seats / vote asymmetry	3.727272727	0.727272727	-3	winner
	map data	vtd level data (DISTRICT)	vtd level data (DISTRICT)
	seats vs. votes
	seats/votes curve
	wasted votes
	districts

* Population can be made arbitrarily close simply by splitting a tabulation district.

WI Congress 1

shapefile

category	measure	current map	autoredistrict map	difference	success?
compact	isoperimetric quotent	0.254615334	0.3847	0.130084666	winner
contiguous	disconnected population	17,081	17,081	0	tie
population	population imbalance %	0.000140672	0.21671	0.216569328	incomparable*
proportional	representation imbalance bits	0.136307396	0.00623	-0.130077396	winner
equal	voting power imbalance bits	0.02695452	0.0093028	-0.01765172	winner
competitive	wasted votes	459,785	114,289	-345,496	winner
	map data	(in shapefile)	vtd level data
	seats vs. votes
	wasted votes
	districts

* Population can be made arbitrarily close simply by splitting a tabulation district.

WI Congress 2 (more competitive)

shapefile

category	measure	current map	autoredistrict map	difference	success?
compact	isoperimetric quotent	0.254615334	0.415501868	0.160886534	winner
contiguous	disconnected population	17,081	17,081	0	tie
population	population imbalance %	0.000140672	0.165433309	0.165292637	incomparable*
proportional	representation imbalance bits	0.136307396	0.087131047	-0.049176349	winner
equal	voting power imbalance bits	0.02695452	0.000169696	-0.026784824	winner
competitive	wasted votes	459,785	82,764	-377,021	winner
	map data	(in shapefile)	vtd level data
	seats vs. votes
	wasted votes
	districts

* Population can be made arbitrarily close simply by splitting a tabulation district.

WI Congress 3 (VERY competitive)

shapefile

category	measure	current map	autoredistrict map	difference	success?
compact	isoperimetric quotent	0.254615334	0.40745016165396	0.15283482765396	winner
contiguous	disconnected population	17,081	17,081	0	tie
population	population imbalance %	0.000140672	0.328809734	0.328669062	incomparable*
proportional	representation imbalance bits	0.136307396	0.125790476	-0.01051692	winner
equal	voting power imbalance bits	0.02695452	0.00007495	-0.02687957	winner
competitive	wasted votes	459,785	54,088	-405,697	winner
	map data	(in shapefile)	vtd level data
	seats vs. votes
	wasted votes
	districts

* Population can be made arbitrarily close simply by splitting a tabulation district.

WI Assembly 1

shapefile

category	measure	current map	autoredistrict map	difference	success?
compact	isoperimetric quotent	0.202333302	0.3551636	0.152830298	winner
contiguous	disconnected population	19,464	17,081	-2,383	winner
population	population imbalance %	0.626594146	8.20443	7.577831854	incomparable*
proportional	representation imbalance bits	0.065439529	0.039303	-0.026136529	winner
equal	voting power imbalance bits	0.041066559	0.01505	-0.026016559	winner
competitive	wasted votes	374,901	346,790	-28,111	winner
	map data	(in shapefile)	vtd level data
	seats vs. votes
	wasted votes
	districts

* Population can be made arbitrarily close simply by splitting a tabulation district.

WI Assembly 2

shapefile

category	measure	current map	autoredistrict map	difference	success?
compact	isoperimetric quotent	0.202333302	0.378356946126573	0.176023644	winner
contiguous	disconnected population	19,464	17,081	-2,383	winner
population	population imbalance %	0.626594146	5.665554719	5.038960573	incomparable*
proportional	representation imbalance bits	0.065439529	0.039328159	-0.02611137	winner
equal	voting power imbalance bits	0.041066559	0.009746331	-0.031320228	winner
competitive	wasted votes	374,901	301,013	-73,888	winner
	map data	(in shapefile)	vtd level data
	seats vs. votes
	wasted votes
	districts

* Population can be made arbitrarily close simply by splitting a tabulation district.

WI Assembly, multi-member proportional (3 seats per district)

shapefile

category	measure	current map	autoredistrict map	difference	success?
compact	isoperimetric quotent	0.202333302	0.344212896	0.141879594	winner
contiguous	disconnected population	19,464	17,081	-2,383	winner
population	population imbalance %	0.626594146	0.955022463	0.328428317	incomparable*
proportional	representation imbalance bits	0.065439529	0.038828419	-0.02661111	winner
equal	voting power imbalance bits	0.041066559	0.142056945	0.100990386	incomparable**
competitive	wasted votes	374,901	250,728	-124,173	winner
	map data	(in shapefile)	vtd level data
	seats vs. votes
	wasted votes
	districts

* Population can be made arbitrarily close simply by splitting a tabulation district.
** Since the voting power balance is calculated as a function of the distribution of power between districts, and the two maps have a different number of districts, the two scores are incomparable.

OH Congress

shapefile

category	measure	current map	autoredistrict map	difference	success?
compact	isoperimetric quotent	0.139802492	0.277336624	0.137534132	winner
contiguous	disconnected population	9,567	0	-9,567	winner
population	population imbalance %	0.885415068	2.93127525	2.045860182	incomparable*
proportional	representation imbalance bits	0.02113972	0.00064651	-0.02049321	winner
equal	voting power imbalance bits	0.055912105	0.006132729	-0.049779376	winner
competitive	wasted votes	738,554	340,875	-397,679	winner
	map data	vtd level data	vtd level data
	seats vs. votes
	wasted votes
	districts

* Population can be made arbitrarily close simply by splitting a tabulation district.

FL Congress (from base map)

shapefile
starting data

category	measure	current proposed map	autoredistrict map	difference	success?
compact	isoperimetric quotent	0.302786339	0.398801848	0.096015509	winner
contiguous	disconnected population	179,823	0	-179,823	winner
population	population imbalance %	2.489440284	2.682976823	0.193536539	incomparable*
proportional	representation imbalance bits	0.000044096	0.000041287	-0.000002809	tie
equal	voting power imbalance bits	0.038568182	0.0076463	-0.030921882	winner
competitive	wasted votes	800,876	542,748	-258,128	winner
competitive	avg. PVI	8.99	6.76	-2.23	winner
competitive	elections w/in 5% PVI	8	14	6	winner
	map data	vtd level data (DISTRICT)	vtd level data (DISTRICT)
	map data	block level data (renamed to .doj)	block level data (renamed to .doj)
	seats vs. votes
	wasted votes
	districts

* Population can be made arbitrarily close simply by splitting a tabulation district.

FL Congress (from base map, 2nd pass)

shapefile
starting data

category	measure	current proposed map	autoredistrict map	difference	success?
compact	isoperimetric quotent	0.302786339	0.472899525	0.170113186	winner
contiguous	disconnected population	179,823	0	-179,823	winner
population	population imbalance %	2.489440284	0.888079211	-1.601361073	incomparable*
proportional	representation imbalance bits	0.000044096	0.000041855	-0.000002241	tie
equal	voting power imbalance bits	0.038568182	0.005898858	-0.032669324	winner
competitive	wasted votes	800,876	490,505	-310,371	winner
competitive	avg. PVI	8.99	6.107	-2.883	winner
competitive	elections w/in 5% PVI	8	16	8	winner
	map data	vtd level data (DISTRICT)	vtd level data (DISTRICT)
	map data	block level data (renamed to .doj)	block level data (renamed to .doj)
	seats vs. votes
	wasted votes
	districts

* Population can be made arbitrarily close simply by splitting a tabulation district.