[Tagging] multiple schools on one plot

[stevea]

On Apr 2, 2021, at 12:42 PM, Robin Burek <robin.burek at gmx.de> wrote:
> Am 02.04.2021 um 21:21 schrieb stevea:
> 
>> AND / OR, it is the "area" (as defined by our amenity=school wiki,
>> where the "Used on these elements" section CLEARLY allows this tag to
>> be applied to an area / closed polygon or multipolygon). Perhaps this
>> is a misunderstanding on your part, but this has simply always been
>> true in OSM, so people have always tagged "school grounds" (the area
>> defined by the enclosing fence or boundary/border of the school) like
>> this: with an area way (closed polygon / multipolygon).
>> It is possible you do not recognize that amenity=school is perfectly OK as a tag on BOTH nodes AND areas.  So, we do.
> 
> 
> I have not say anithing like this.
> A single school on one ground ist mapped as an area -> The school with
> it (only by the school used) ground. This is ONE school.

Well, on an AREA, the tag of amenity=school really means "the school grounds."  It simply does:  it always has as an OSM convention.  People have understood this for about 15 years, nearly all of OSM's existence.  Even our wiki for landuse=education says "The more common amenity tags for specific education types...(already) imply landuse=education."  What more do you need to say that your proposal is superfluous?!

> So you have an
> area marked with amenity=school. So you mark the school.

I'm going to continue to sharpen your understanding here by insisting you say that by tagging with amenity=school on the (multi)polygon, (not a node), you really are "marking the school GROUNDS."

> You are overinterpreting the "area-Symbol" in the wiki.

No, I am exactly interpreting it:  on a node, this tag means "the school" or perhaps "the headquarters (administrative offices) of the school."  On a (multi)polygon, this tag means "the school grounds."  There is not "fake," nor is it "double-tagging," it is one tag on one data element meaning one thing and another same tag on a different data element meaning a slightly different (but related, both ontologically and geographically) thing.

> This does not mean, that amenity=school work for the school and the
> school ground.

Yes, that is exactly what it means.  By both wiki documentation and by convention over virtually the entire lifetime of the amenity=school tag.

> But in the "normal case" the (singular) school is marked
> by it ground. But this is don't work fine, if there are multiple schools
> or a school and a kindergarten on one ground.

Yes, it does.  Tag amenity=school on the (multi)polygon which encloses, tag amenity=kindergarten on a node locating the kindergarten, tag amenity=school on the (likely grades 1-6, at least around here) on the node representing "the administrative offices" of the school as a whole (which likely includes the administration of the kindergarten, but that's simply "tough" and we all know what is semantically going on here anyway, it's not that complicated and it is certainly not so complicated we need to mess up the landuse tag, exactly as our wiki says (by discouraging, though mildly, the use of landuse=education, saying "amenity=[school, kindergarten...] already implies this.