On Sun, Jan 12, 2014 at 7:18 AM, Peter Davies <[email protected]>wrote:
> We would post the cardinal directions using tags for each whole > directional relation. However where the Muskogee Turnpike turns from E-W to > S-N, or has some even more complex deal such as E +ve and N -ve, the > 3-relation method will fail. We could further extend it by breaking the > relations at the turns (strictly, at the directional posting changes), > having maybe nine relations for a complete rectangular beltway (2 on each > of the N, S, W, and E sides, plus a parent) but Martijn and Kristen Kam > have wanted to avoid relation proliferation. This is why Martijn's firm > (and OSM mappers) have adopted a hybrid system, as I understand it, using > posted directions on roles for complex routes, and posted directions on > directional relations for simple Interstates like I 5. What's wrong with having one relation per direction with the super relation acting as a binder clip? I'm not understanding how this fails.
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