On Thu, Oct 16, 2008 at 9:28 AM, Andy Allan <[EMAIL PROTECTED]> wrote:
> On Thu, Oct 16, 2008 at 6:28 AM, Karl Newman <[EMAIL PROTECTED]> > wrote: > > > Just to reiterate my perspective, the Karlsruhe schema is fine for what > it > > is, but it's not sufficient for all uses. > > Perhaps not natively, but I don't see why it can't be converted into > interpolated-on-street during processing? I don't know of any use of > OSM data that doesn't require *some* level of processing. > > On the other hand, putting the information directly on the street > limits the ability to produce useful things like maps with numbers on > the building outlines. So I'd say we should go for "numbers on houses" > (e.g. Karlsruhe scheme), and downgrade using post-processing to > "numbers on streets" whenever there's such desire / technological > limitations. > > Cheers, > Andy > That's the problem--the Karlsruhe schema does not lend itself to that sort of transformation very well. And it requires a stupid amount of preprocessing if it's going to be used. There is nothing to associate the node to the street other than MAYBE the name, which is pretty poor for a relational data model. It could be misspelled or linked to the wrong street with a similar name or even just the wrong section of the street. Also, consider the case where a road makes a tight U-turn, and the address node is placed somewhere in the middle. It's entirely possible (in fact, I can guarantee it will happen somewhere in the world) that the the node will be associated with the wrong portion of the street. Karl
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