suggestion from fairvote.org better control over contiuity

[happyjack27]

1. A check box to mandate full contiguity from the beginning when making a map. Would be nice to not have to worry about getting to full contiguity, since I think it is mandated anyway for congressional districts.

my response: 3. not as simple as what you say. the goal is, yes, to end up with fully contiguous districts. but the way the genetic algorithm works, when you recombine two fully contiguous maps, you're not guaranteed to get a contiguous result. i added the "mutate disconnected" options to help get rid of the discontinuites i'll think of maybe how to improve this, maybe add a "reject" discontinuous". either way this dramatically slows down the search and limits exploration, so it's generally better not to enforce this rule until the very end. i'll make an enhancment ticket, though.

also maybe add an in-app explanation about this.