2009/11/13 Andrew Errington <a.erring...@lancaster.ac.uk>: > You could calculate node density (nodes/km2) and assume that node density > will decay from the centre of a town to the edge. This would work for the > nodes in ways, since 'in town' will have more streets than 'out of town'. > A rural area with winding roads might have an increased number of nodes > (to get smooth curves) but it would have fewer roads. You could also use > POI density, on the assumption that there are more shops, hospitals, pubs > and restaurants in a town, and the density drops off out of town. Set a > threshold, and mark the border between above threshold (in town) and below > threshold (out of town).
Depending how far a settlement is from a city the denisty will vary greatly. > Places like London would be tricky, as the node density would be high > across the whole area, so maybe you can't pick out the individual towns. There is also the problem of arbitary boundaries, not just geographical ones. _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
