Architecture used.
City blocks.
Buildings (with base heights).
Centre (frame-local).
District layout.
A farmstead's yard, fields, tractor spots and props (null for other settlements, and for a farm with no dry, gentle ground).
Road network (planar graph); node heights are graded road surface heights.
Lots.
Estimated residents.
Graded centreline of every road edge, by edge id.
Radius used, metres.
Ground under the settlement.
Street layout used.
Everything generated for one settlement, before any rendering. Plain data plus the road graph.