it has something to do with “density” (in different ways).
it can not be defined only through the magnitude of a settlement or the number of its inhabi-tants.
there also must be criterions of quality like “quality of life”, wellbeing, numerous cultural and social facilities and others.
Add others …..
Suggestion:
we do a Web research on Urbanity in general and try to find points that relate to smaller settlements (= small towns, marketplaces,...) and focus on small towns.