On 29/04/10 11:25, Valentijn Sessink wrote:

I was wondering what is the difference between --remove-short-arcs and --reduce-point-density. Their description differs (short-arcs says it removes things that cause "routing problems", while point-density seems some sort of general simplification), but I'd think that using --reduce-point-density would mean that there's no short-arcs left afterwards, or are there? I.e. is there any cross effect between the two?

The reduce-point-density removes points that are not required to preserve the shape of the line to a given level of accuracy. It is mainly of use at the lower resolution levels and it is not used at all at resolution 24. The remove-short-arcs option removes short sections of road by merging and deleting nodes while preserving the connections between lines and boundary nodes. It does this in the full detailed data before the road network is created. So even if reduce-point-density was run at resolution 24, it would be too late I think as the road arcs have already been created. Also I don't think that reduce-point-density is guaranteed to remove short arcs anyway. ..Steve