I was thinking more that compactness and/or convex polygon-ness could just be necessary constraints, not sufficient. You'd still get to draw the lines in ways t

I was thinking more that compactness and/or convex polygon-ness could just be necessary constraints, not sufficient. You'd still get to draw the lines in ways that split the state's population according to shifting population and demographics, but you wouldn't be able to draw districts that are quite so crazy looking.