Spacing of minor streets, metres (0 = no minor streets, e.g. fields and parks).
Chance (0..1) that a lot with street frontage gets a building.
Floor count range: the low end at the settlement edge, the high end where density peaks.
Target lot area, m². Blocks are split until lots are about this big.
Narrowest acceptable lot, metres (also the smallest split piece).
Building setback from the lot edge, metres.
Layout and building rules for one kind of district.