On Sun, Jun 20, 2010 at 7:34 AM, Richard Mann <richard.mann.westoxf...@googlemail.com> wrote: > There's a school of thought that would like to see cycle maps produced > in this way (the people in Cheltenham call it the Cheltenham > standard), using a 5-point scale (roughly: dead-quiet, ok if you can > manage a straight line, need to be able to deal with a few cars, need > to be able to look over your shoulder, need to be able to go as fast > as the cars at junctions). Some of these are tagged as > cyclability=1|2|3|4|5, but I don't know anywhere that's done it on a > comprehensive basis using OSM. You could probably derive the values > from the traffic volume and the typical speed, if you want to do it > scientifically.
Looking at tagstat, it is indeed pretty rare. There are a total of 18 ways tagged with the cyclability tag. But I do like this idea. I don't really like relying on speed and type of road (primary, secondary, etc) for extrapolating cyclability. It is a good start but there is more that contributes to the overall cyclability of a given road. A lot of it has to do with visibility and sometimes vertical climb. I feel much more comfortable riding on busy streets if I can keep a 20+ mph pace as opposed to climbing a hill at 10. > In Oxford, we tend to focus on levels 2 & 4 in that hierarchy, and > look for how you can get about the city if your skill level has > reached those two points. From that we've identified two networks for > getting about (the "main" and "quiet" networks). We've used > mcn=something for the main routes and lcn/lcn2=something for the quiet > routes. This is certainly a good idea for producing the "routes you DO want to take" map. I will have to look at some of the data in Oxford and see how to adapt it here. > As for rendering, you can either try to persuade Andy (the guy behing > opencyclemap) that he wants to include it (or probably better) render > it yourself. I've been getting quite a long way with Maperitive (which > is a fairly simple but not quite fully developed renderer for the > non-geek). Halcyon may also be available before too long. > > You can see what we've done at > http://www.cyclox.org/oxford-journey-planner/cyclox-map/ Yeah, we are looking into doing some of our own rendering but if we can indeed come up with a workable standard I think it would be great to get other renderers to pick it up as well. Toby _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk