On 22 May 2015 at 14:03, Christopher Baines <[email protected]> wrote: > On 21/05/15 22:39, Dan S wrote: >> I don't relish bringing this up since it's a bit of a tangle, but I >> noticed Cambridge has a lot more universities than I thought! >> Apparently 1219, judging from the number of amenity=university tagged >> objects. In real life I'm aware of two: Cambridge Uni, Anglia Ruskin >> Uni. > > I think that it is a poor assumption to make that there exists a one to > one mapping between objects (nodes, ways, relations) tagged with > amenity=university, and actual organisations.
Sure, but then you need to look at what is actually being tagged. We've already heard that there are 1219 different universities in Cambridge, so I was intrigued as to what they are. After all, I would expect "amenity=university; name=University of Somewheresville" to be a university. If there were two objects tagged as universities with identical names within a few dozen miles, I could make a guess they are the same university and write some rendering rules to suit. But they are all different. There's a university named "Music Centre". There's another university called "Pavillion D". There's a third university called "Forbes Mellon Library" which is a surprising thing to call a university. There's a bunch of little unamed universities. And they all have different operator tags too. I suspect these are the names of buildings, not universities. I suspect they are operated by different sections of the one university, but there's no easy way to tell from the operator tag without a natural-language parser coupled with a wikipedia-based explanation of the constituent college system. Have a look at the data, and you'll see it's not as straightforward as you think. Sure, there's no one-to-one mapping between the real world and OSM features. But that's not what we're talking about here. Thanks, Andy _______________________________________________ Talk-GB mailing list [email protected] https://lists.openstreetmap.org/listinfo/talk-gb
