Christopher Ingraham: The point of gerrymandering is to “give your opponents a small number of safe seats, while drawing yourself a larger number of seats that are not quite as safe, but that you can expect to win comfortably.”
“The compactness of a district — a measure of how irregular its shape is, as determined by the ratio of the area of the district to the area of a circle with the same perimeter — can serve as a useful proxy for how gerrymandered the district is. Districts that follow a generally regular shape tend to be compact, while those that have a lot of squiggles and offshoots and tentacle-looking protuberances tend to score poorly on this measure.”
“I calculated compactness scores for each of the districts of the 113th Congress and mapped them so you can see where the least compact — and likely most-gerrymandered –districts are.”
North Carolina comes out near the top with three of the ten most gerrymandered districts.