[Talk-GB] too many universities in Cambridge

David Earl david at frankieandshadow.com
Fri May 22 13:27:15 UTC 2015


Andy, the operator tags are all the same, not the building names.

But also the assertion "within a few dozen miles" is wrong, as for
Nottingham in China.

On Fri, 22 May 2015 at 14:23 Andy Allan <gravitystorm at gmail.com> wrote:

> On 22 May 2015 at 14:03, Christopher Baines <mail at cbaines.net> 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
>
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