On Mon, 2012-12-03 at 08:46 +0100, Frederik Ramm wrote: > Hi, > > On 12/01/12 15:05, Chris Baines wrote: > > As part of the Random Hacks of Kindness (RHoK) event, myself and a > > friend have been working on the Granular Health Map problem [1]. We have > > started trying to tackle the catchment area problem, and have created a > > proposal [2]. We both have some experience mapping in OSM, but not any > > about proposals, so please let us know if we can improve it. > > I don't think that catchment areas are suitable for OSM because they are > not observable on the ground.
Lots of things in OSM are not observable on the ground, take the boundary relation for example [1]. > Also, the thought of having one area relation for each pizza delivery > place in a medium-sized city makes my hair stand on end. Streets in that > city would all become members of 10 or more relations, which would be > broken 90% of the time. Firstly, since subjects can share a boundary relation, you could have only one relation for each pizza delivery place in a medium-sized city (given that they all have the same catchment area). Secondly, I don't think the breakage problem is specific to this proposal, its a issue with the way relations work, and improving the relation situation is far outside the scope of this proposal. 1: https://wiki.openstreetmap.org/wiki/Relation:boundary
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