splitline redistricting

[freepcrusher]

here is one example of what it would look like. For cope and bk here's Georgia.




District 1
Race: 56.3 Wh, 34.6 Bl, 5.5 Hisp, 1.7 Oth, 1.6 Asn, 0.2 Nat
PVI (all are 2008): R+5.9

District 2
Race: 52.1 Wh, 41.0 Bl, 4.3 Hisp, 1.2 Oth, 1.1 Asn, 0.2 Nat
PVI: R+8

District 3
Race: 54.3 Wh, 38.6 Bl, 3.8 Hisp, 1.6 Oth, 1.4 Asn, 0.3 Nat
PVI: R+4.8

District 4
Race: 47.8 Wh, 21.3 Hisp, 19.1 Bl, 9.4 Asn, 2.2 Oth, 0.2 Nat
PVI: R+4.4

District 5
Race: 45.9 Bl, 38.2 Wh, 9.1 Hisp, 4.7 Asn, 1.9 Oth, 0.2 Nat
PVI: D+25.4

District 6
Race: 53.7 Wh, 36.8 Bl, 6.4 Hisp, 1.9 Oth, 1.1 Asn, 0.2 Nat
PVI: R+6.9

District 7
Race: 80.2 Wh, 9.5 Hisp, 7.1 Bl, 1.6 Oth, 1.4 Asn, 0.2 Nat
PVI: R+26.2

District 8
Race: 64.7 Wh, 25.6 Bl, 7.1 Hisp, 1.4 Oth, 0.9 Asn, 0.3 Nat
PVI: R+18.1

District 9
Race: 79.8 Wh, 14.1 Hisp, 3.3 Bl, 1.3 Asn, 1.2 Oth, 0.3 Nat
PVI: R+31

District 10
Race: 58.6 Wh, 32.8 Bl, 4.5 Hisp, 2.0 Asn, 1.8 Oth, 0.2 Nat
PVI: R+6.5

District 11
Race: 57.9 Wh, 14.6 Bl, 12.7 Hisp, 12.5 Asn, 2.2 Oth, 0.2 Nat
PVI: R+16.2

District 12
Race: 47.9 Wh, 34.2 Bl, 12.2 Hisp, 3.3 Asn, 2.2 Oth, 0.2 Nat
PVI: R+1

District 13
Race: 46.7 Bl, 41.6 Wh, 6.5 Hisp, 3.0 Asn, 1.9 Oth, 0.2 Nat
PVI: D+2.1

District 14
Race: 49.3 Wh, 40.1 Bl, 6.6 Hisp, 1.9 Asn, 1.8 Oth, 0.2 Nat
PVI: R+1.1

[freepcrusher]

Been discussed before, and it was realized that this algorithm really hates keeping cities together.

but you're biases are realizing that. Besides, if you look at the PVI of these districts it tends to represent the state better.

[freepcrusher]

Been discussed before, and it was realized that this algorithm really hates keeping cities together.

but you're biases are realizing that. Besides, if you look at the PVI of these districts it tends to represent the state better.

Biases? In favor of keeping cities together? That's not a bias.

A 12-2 result better represents Georgia than a 9-5 result? In a state that was 53-45 in the recent Presidential election?

the median district is close to the state as a whole. And there are three or four RPVI districts the dems could win. 95% of all Georgia republicans are too conservative to win anything below an R+5.

[freepcrusher]

Is it always bad to split cities?  I'm not saying that cities should be split in such a way that diminishes their power maliciously, but it would seem that there are a lot of cases where a city is better off being the plurality in two districts rather than 100% of the population in one district.  

The polarized situation in Congress, especially the House, is partially a result of cities not being split.  Most of the remaining moderate Republicans live in urban areas where there is no chance of electing a Republican, and moderate Dems in rural areas where the reverse is true.

The opposite of splitting big cities is to create a map like IL. Tentacles extend out from the city well into the suburbs and even to some exurbs so that a population insufficient for 4 CDs has 7 instead. The result does nothing to create moderate districts.



CD 1, 2, 3, 4, 5, 7, and 9 are anchored in Chicago. Population 2.7 M. CD size 713 K.

Illinois 1 D+35.3
Illinois 7 D+32.6
Illinois 9 D+28.4
Illinois 5 D+24.9
Illinois 8 D+24.9
Illinois 10 D+11.4
Illinois 4 D+8.1
Illinois 6 D+5.3
Illinois 2 D+3.7
Illinois 12 D+3.4
Illinois 16 D+2.4
Illinois 3 D+2
Illinois 13 D+1.6
Illinois 17 D+1.1
Illinois 14 D+1
Illinois 15 R+3.7
Illinois 18 R+5.2
Illinois 11 R+8.3

[freepcrusher]

here's California which is harder to do because of the mountains and bays

[freepcrusher]

race and PVIs

District 1
Race: 76.3 Wh, 13.7 Hisp, 3.5 Oth, 3.1 Nat, 2.3 Asn, 1.0 Bl
PVI: R+2.6

District 2
Race: 49.4 Wh, 21.8 Hisp, 15.3 Asn, 9.3 Bl, 3.8 Oth, 0.3 Nat
PVI: D+24.8

District 3
Race: 62.9 Wh, 21.6 Hisp, 8.2 Asn, 3.5 Oth, 2.5 Bl, 1.2 Nat
PVI: R+2.8

District 4
Race: 72.4 Wh, 13.3 Hisp, 7.3 Asn, 3.4 Oth, 2.8 Bl, 0.7 Nat
PVI: R+8.4

District 5
Race: 61.1 Wh, 26.7 Hisp, 4.6 Asn, 3.6 Bl, 3.3 Oth, 0.7 Nat
PVI: D+16.5

District 6
Race: 37.4 Wh, 27.5 Hisp, 19.2 Asn, 10.8 Bl, 4.6 Oth, 0.5 Nat
PVI: D+11.9

District 7
Race: 59.2 Wh, 19.9 Hisp, 8.3 Asn, 7.5 Bl, 4.4 Oth, 0.6 Nat
PVI: D+1.2

District 8
Race: 41.6 Hisp, 41.3 Wh, 8.9 Bl, 4.9 Asn, 2.7 Oth, 0.5 Nat
PVI: R+6.8

District 9
Race: 37.3 Hisp, 32.5 Wh, 14.5 Asn, 11.2 Bl, 4.0 Oth, 0.4 Nat
PVI: D+10.9

District 10
Race: 52.1 Wh, 36.6 Hisp, 5.3 Asn, 2.9 Oth, 2.4 Bl, 0.7 Nat
PVI: R+4.9


District 11
Race: 61.1 Wh, 16.3 Hisp, 15.3 Asn, 4.0 Oth, 3.1 Bl, 0.2 Nat
PVI: D+10.6

District 12
Race: 42.6 Wh, 32.2 Asn, 15.5 Hisp, 5.9 Bl, 3.5 Oth, 0.2 Nat
PVI: D+32.8

District 13
Race: 34.8 Wh, 20.8 Hisp, 20.2 Bl, 19.4 Asn, 4.5 Oth, 0.3 Nat
PVI: D+37.2

District 14
Race: 40.3 Wh, 29.1 Asn, 24.1 Hisp, 3.7 Oth, 2.5 Bl, 0.2 Nat
PVI: D+20.2

District 15
Race: 33.0 Asn, 28.6 Wh, 26.5 Hisp, 7.3 Bl, 4.3 Oth, 0.3 Nat
PVI: D+19.8

District 16
Race: 46.6 Hisp, 38.5 Wh, 7.3 Asn, 4.6 Bl, 2.3 Oth, 0.7 Nat
PVI: R+3.5

District 17
Race: 55.1 Wh, 26.5 Hisp, 13.0 Asn, 3.5 Oth, 1.7 Bl, 0.3 Nat
PVI: D+17.7

District 18
Race: 39.8 Asn, 37.9 Wh, 16.0 Hisp, 3.6 Oth, 2.5 Bl, 0.2 Nat
PVI: D+20.5

District 19
Race: 38.9 Hisp, 33.8 Asn, 21.6 Wh, 3.0 Bl, 2.5 Oth, 0.2 Nat
PVI: D+18.4

District 20
Race: 52.6 Hisp, 34.0 Wh, 7.1 Asn, 3.2 Bl, 2.7 Oth, 0.3 Nat
PVI: D+12

District 21
Race: 51.8 Hisp, 38.0 Wh, 3.9 Asn, 3.6 Bl, 1.8 Oth, 0.8 Nat
PVI: R+13



District 22
Race: 53.4 Hisp, 31.5 Wh, 8.7 Asn, 3.6 Bl, 1.8 Oth, 0.9 Nat
PVI: R+4.2

District 23
Race: 46.7 Wh, 43.1 Hisp, 3.9 Asn, 3.4 Bl, 2.2 Oth, 0.6 Nat
PVI: D+4.2

District 24
Race: 46.7 Wh, 43.9 Hisp, 3.3 Asn, 3.3 Bl, 2.2 Oth, 0.6 Nat
PVI: R+3.9

District 25
Race: 44.3 Wh, 34.7 Hisp, 9.6 Bl, 8.1 Asn, 3.0 Oth, 0.3 Nat
PVI: R+2.8

District 26
Race: 47.1 Wh, 41.3 Hisp, 7.2 Asn, 2.4 Oth, 1.7 Bl, 0.3 Nat
PVI: D+1.8

District 27
Race: 53.5 Hisp, 28.8 Wh, 12.0 Asn, 3.6 Bl, 1.9 Oth, 0.2 Nat
PVI: D+6.2

District 28
Race: 44.7 Wh, 34.6 Hisp, 13.7 Asn, 4.0 Bl, 2.8 Oth, 0.2 Nat
PVI: D+17

District 29
Race: 47.6 Hisp, 35.0 Wh, 11.1 Asn, 3.6 Bl, 2.4 Oth, 0.2 Nat
PVI: D+12.9

District 30
Race: 46.2 Wh, 39.5 Hisp, 7.7 Asn, 3.7 Bl, 2.7 Oth, 0.2 Nat
PVI: D+19.1

District 31
Race: 52.2 Hisp, 31.1 Wh, 9.2 Bl, 5.0 Asn, 2.2 Oth, 0.4 Nat
PVI: D+2.5

District 32
Race: 72.8 Hisp, 16.7 Asn, 8.1 Wh, 1.6 Bl, 0.8 Oth, 0.2 Nat
PVI: D+19



District 33
Race: 61.2 Wh, 16.8 Hisp, 12.3 Asn, 5.6 Bl, 3.9 Oth, 0.2 Nat
PVI: D+25.4

District 34
Race: 54.8 Hisp, 17.2 Asn, 13.1 Bl, 12.8 Wh, 1.9 Oth, 0.2 Nat
PVI: D+30.8

District 35
Race: 58.6 Hisp, 24.0 Wh, 7.8 Asn, 7.4 Bl, 1.9 Oth, 0.3 Nat
PVI: D+5.8

District 36
Race: 55.0 Hisp, 37.8 Wh, 2.9 Bl, 2.3 Asn, 1.4 Oth, 0.7 Nat
PVI: D+2

District 37
Race: 47.5 Hisp, 28.9 Asn, 19.1 Wh, 2.6 Bl, 1.7 Oth, 0.2 Nat
PVI: D+15.6

District 38
Race: 50.5 Hisp, 24.8 Wh, 19.9 Asn, 2.7 Bl, 1.9 Oth, 0.2 Nat
PVI: D+3.3

District 39
Race: 51.8 Hisp, 23.3 Asn, 19.7 Wh, 3.3 Bl, 1.7 Oth, 0.2 Nat
PVI: D+4.6

District 40
Race: 84.4 Hisp, 12.3 Bl, 1.9 Wh, 0.7 Asn, 0.6 Oth, 0.1 Nat
PVI: D+35.8

District 41
Race: 46.2 Hisp, 35.0 Wh, 9.5 Bl, 6.3 Asn, 2.6 Oth, 0.4 Nat
PVI: D+0.7

District 42
Race: 55.8 Wh, 30.8 Hisp, 5.5 Asn, 3.7 Bl, 2.9 Oth, 1.3 Nat
PVI: R+12.9

District 43
Race: 45.8 Hisp, 32.8 Bl, 13.9 Wh, 5.0 Asn, 2.4 Oth, 0.2 Nat
PVI: D+30.4



District 44
Race: 34.5 Hisp, 33.4 Wh, 20.8 Asn, 7.8 Bl, 3.2 Oth, 0.2 Nat
PVI: D+8.5

District 45
Race: 49.6 Wh, 25.3 Hisp, 20.0 Asn, 3.3 Oth, 1.7 Bl, 0.2 Nat
PVI: R+3.1

District 46
Race: 53.4 Hisp, 30.2 Wh, 12.6 Asn, 1.8 Bl, 1.8 Oth, 0.2 Nat
PVI: R+3.5

District 47
Race: 41.2 Hisp, 30.2 Wh, 12.9 Asn, 12.7 Bl, 2.8 Oth, 0.3 Nat
PVI: D+13.1

District 48
Race: 37.3 Wh, 33.2 Hisp, 26.0 Asn, 2.3 Oth, 1.0 Bl, 0.2 Nat
PVI: R+5.9

District 49
Race: 65.3 Wh, 21.5 Hisp, 7.8 Asn, 3.2 Oth, 1.8 Bl, 0.3 Nat
PVI: R+7.8

District 50
Race: 39.7 Wh, 37.8 Hisp, 11.6 Asn, 7.0 Bl, 3.6 Oth, 0.3 Nat
PVI: D+0.5

District 51
Race: 46.4 Hisp, 33.4 Wh, 9.2 Asn, 7.9 Bl, 2.7 Oth, 0.3 Nat
PVI: D+16.8

District 52
Race: 52.6 Wh, 32.8 Hisp, 8.6 Asn, 3.1 Oth, 2.6 Bl, 0.3 Nat
PVI: R+6.4

District 53
Race: 61.9 Wh, 18.0 Asn, 13.4 Hisp, 4.0 Oth, 2.5 Bl, 0.3 Nat
PVI: D+4

[freepcrusher]

here's my guess at what Virginia would look like. Its not perfect (VA 3 in particular) but I think its pretty accurate




VA 1
66.7 Wh, 20.6 Bl, 6.7 Hisp, 2.8 Oth, 2.7 Asn, 0.4 Nat
PVI (all 08): R+5.2

VA 2
53.2 Wh, 34.3 Bl, 6.2 Hisp, 3.0 Oth, 2.9 Asn, 0.4 Nat
PVI: D+7.2

VA 3
68.2 Wh, 21.6 Bl, 4.1 Asn, 3.8 Hisp, 2.0 Oth, 0.2 Nat
PVI: R+1.5

VA 4
55.8 Wh, 32.2 Bl, 4.7 Hisp, 4.1 Asn, 2.9 Oth, 0.3 Nat
PVI: D+0.5

VA 5
52.5 Wh, 37.6 Bl, 5.9 Hisp, 1.9 Oth, 1.8 Asn, 0.3 Nat
PVI: D+2.4

VA 6
75.9 Wh, 18.7 Bl, 2.5 Hisp, 1.6 Oth, 1.1 Asn, 0.3 Nat
PVI: R+10.3

VA 7
82.1 Wh, 7.6 Bl, 6.4 Hisp, 2.0 Oth, 1   .7 Asn, 0.2 Nat
PVI: R+9

VA 8
54.2 Wh, 18.7 Hisp, 12.8 Asn, 11.1 Bl, 2.9 Oth, 0.2 Nat
PVI: D+15

VA 9
90.3 Wh, 5.1 Bl, 2.0 Hisp, 1.2 Asn, 1.2 Oth, 0.2 Nat
PVI: R+13.2

VA 10
61.1 Wh, 16.9 Asn, 12.1 Hisp, 6.4 Bl, 3.3 Oth, 0.2 Nat
PVI: D+3.6

VA 11
53.0 Wh, 17.8 Hisp, 13.0 Asn, 12.6 Bl, 3.5 Oth, 0.2 Nat
PVI: D+3.3