Am 17.10.2012 00:18, schrieb Anthony: > On Tue, Oct 16, 2012 at 9:30 AM, Tobias Knerr <o...@tobias-knerr.de> wrote: >> On 16.10.2012 01:07, Anthony wrote: >>> As long as you have width information on the ways, I don't see the >>> problem. The amount of physical separation, whether it be an inch >>> between two lines, or a meter, should be easily calculated from the >>> data. >> >> There are actually several problems: >> >> * Most importantly, neither width tags nor the distance between two >> parallel ways are mapped with one-inch accuracy. > > If this is the most important, then you are seriously stretching it. > What's the need for one-inch accuracy?
You suggested that "the amount of physical separation, whether it be an inch between two lines, or a meter, should be easily calculated from the data." I'm saying a separation of an inch between two lines can _not_ be calculated from the data because it's not remotely precise enough, and shouldn't be expected to be. >> * If you represent the two lines as a separation between ways, then you >> don't know that the two lines are there - so you cannot render them. > > I'm not sure what this means. The ways don't represent lines, they > represent paths of travel. In my statement above, "the two lines" refers to the road markings. > There are lots of paved surfaces which are not mapped. [...] > Furthermore, what do you suggest we do with section 6 If someone cares about the surface of an area which is not part of any highway, they can map it as an area with surface=*. This does not seem like an appropriate solution for the tiny "area" between two white lines of paint, though. Tobias _______________________________________________ Tagging mailing list Tagging@openstreetmap.org http://lists.openstreetmap.org/listinfo/tagging
