Something to remember is that strahler order often used to make "bigger streams" is a measure of connectivity rather than importance. Like, a significant stream can have the same strahler order as a tiny trickle. In waterwaymap.org, it looks like this happens a bit (sudden jumps in stream width etc). Having said that I haven't looked into how the widths are computed.
As far as I can tell, the waterwaymap.org is based on upstream *distance* rather than something like strahler order.
A possibly obvious contribution is that streams from a 10m DTM will be different from streams made with a 2m DTM. I also wonder if computing stream power (or some related metric) might also help? Thinking about rendering in terms of how much water might come here.
Some kind of rendering based on stream contribution would be better, but I think it's probably beyond what can be reasonably squeezed into OSM. The distance measure is probably not a bad proxy. cheers Tom ---- Canyoning? try http://ozultimate.com/canyoning Bushwalking? try http://bushwalkingnsw.com _______________________________________________ Talk-au mailing list [email protected] https://lists.openstreetmap.org/listinfo/talk-au
