Strangely wiggly streets

[arnt]

Hi,

just a cosmetic issue:

https://www.sprawlmap.org/#15.9/48.128551/11.608897 shows a number of wiggly streets. In actual fact those streets are straight. The street in the middle (called Friedenstraße) is straight apart from a very slight curve. The giant wiggle in the middle is not real.

However, the streets actually meet as in reality, so this issue is just cosmetic, not topological.

Arnt

[Adam Millard-Ball]

This was a big issue that we struggled with. In some places, there are parallel edges (e.g. different sides of a dual carriageway), or staggered intersections. We wanted to avoid our measures being sensitive to the precise geometric representation of a street in OSM, and so we collapsed nodes that are within a radius, and realigned edges to meet at that node. This leads to a more accurate NETWORK representation, but creates these weird wiggly streets that you point out.

See https://gis.stackexchange.com/questions/98269/collapse-dual-carriageway-lines-in-postgis for some of the challenges. We'd love to hear ideas about how to fix this more elegantly.

Adam

[arnt]

If I understand you correctly, the collapsing works, but you're not picking the ideal point within the collapsed radius. The average of the points that you collapse seems like a decent candidate. But I cannot muster much enthusiasm. It's just cosmetic after all, the important part works.

Arnt