2010/6/6 Roy Wallace <[email protected]>: > On Sun, Jun 6, 2010 at 10:21 AM, Dave F. <[email protected]> wrote: >> >> Off the top of my head I'm thinking of a line within the area that >> defines the direction. it would have to be linked to the boundary by >> using relations(?) > > Yup that is how I think also. Still no complete solution, but probably > worth refining this, as a start: > http://wiki.openstreetmap.org/wiki/Relations/Proposed/Area
yes, this is indeed one possible usage of this proposal: you could map the beginning and end of each continuous steps. (this is 2 lines: one indicating the lower end and one way following the upper end. In the middle (horizontal areas with no elevation = landing) you could define them as such (without even redrawing the ways). This enables as well to map curved/multiangled steps, but still is problematic in cases, where the steps intersect with a diversely inclined terrain (therefore resulting in different amount of steps on the left and on the right side). In the relation you could enter additional information (steps=15) for the number of steps, to define it in ultimate detail (optionally). Unfortunately no current renderer or router is able to use this. > Note that this will still not be a perfect solution for the > semi-circular steps/terraces, because a way + area will not define the > "curve" in each step. yes, they will in many/most (exceptions see above) cases (according to the area proposal you don't map areas as closed polygons). To do this explicitly, you'd probably want to > map each step individually (as a curved way), you would do this following the area-proposal, but you would probably reduce it from "each step" to "each first and last step of a continuity of steps". cheers, Martin _______________________________________________ talk mailing list [email protected] http://lists.openstreetmap.org/listinfo/talk
