[Tagging] "dispute" about how to tag a type=multipolygon relation

[sly (sylvain letuffe)]

> Let me first point out that these edits don't affect the definition of
> the multipolygon relation per se. 
> No relation would become "invalid", so 
> this doesn't break anything. 
To be honnest, by what I read of the change, it wasn't so obvious.
When reading :
"Use multipolygons only if there is no other way to map something"
"Don't split highways into shorter segments, to create an outer-ring for a 
multipolygon"

Does seams "order like" to me, maybe some sentences like :
"Sometimes it is better to avoid spliting short segments for ease of editing"
or
"Both spliting or superposing ways is supported to build 2 touching areas 
represented by multipolygons, and you can choose the one you want that fits 
you better"
whould have had my preference ;-)

> It is about which of the alternative 
> mapping styles is preferable when either would work from a technical
> point of view.

I understand that, and I think there is no "one answer to all" because it 
depends on the editor used, on the real case, on the tags we want to add to 
ways (if any)

> My opinion here is that multipolygon relations should not be used
> unnecessarily. So if a closed way is possible (no holes, "small" area),
> then it should be used instead of a multipolygon.

I share that opinion on "small" area as well, although my "small" isn't 
probably your "small", but whatever, I think people should be let to decide 
with both solutions explained on the wiki at equal, not expressing it some 
ways one could think it means "can't" or "don't"

I do personnaly use multipolygons every now and then, but not for isolated 
areas, because I don't need them in that case, but whenever there is a common 
border of say... more than ~30 nodes between two areas (a forest and a lake, 
forest clearing, lake and beach) I find if more convenient to re-use the 
border in a multipolygon that re-drawing two ways on top of each other.
 
Still, I use both method, even the extra simple one without multipolygon at 
all, which is my prefered for "small" and isolated areas


-- 
sly
qui suis-je : http://sly.letuffe.org
email perso : sylvain chez letuffe un point org