[Tagging] How to tag named group of named water areas?

Kevin Kenny kevin.b.kenny at gmail.com
Mon Oct 8 18:30:39 UTC 2018

Group relations have been proposed (
https://wiki.openstreetmap.org/wiki/Relations/Proposed/Group_Relation) in
the past. One has been used to group the Great Lakes:

I'm tempted to use type=group relations to group the Bisby Lakes,
https://www.openstreetmap.org/way/198380582, the Cedar Lakes (First,
Second, Third and Fourth are all conflated in OSM)
https://www.openstreetmap.org/relation/3586769, the Essex Chain of Lakes
https://www.openstreetmap.org/relation/3696734, the Fulton Chain of Lakes:
https://www.openstreetmap.org/relation/195478, and similar groupings,
because the unimaginative names of the individual lakes are, to say the
least, uninformative. If enough people use type=group, the renderers,
Nominatim, and other data consumers will eventually catch up, I suppose.

Note that US Geologic Survey topo maps have historically indicated the
chain names as well as the lake names, so the USGS cartographers have
considered both names to be significant:
shows the Essex Chain and
https://caltopo.com/map.html#ll=43.7229,-74.90313&z=14&b=t&o=r&n=0.25 shows
the foot of the Fulton Chain, for instance.

I haven't tried to push this issue, because the rendering world is truly
not ready for it.  One of these years I'm going to want to try my hand at
implementing a renderer that incorporates some of the ideas of
https://pure.tue.nl/ws/files/88830694/labellingFramework.pdf and
for labeling elongated areas and groups (such as archipelagoes, mountain
ranges, broad rivers, and chains of lakes). Don't expect it any time soon.
So many projects, so little time...

On Mon, Oct 8, 2018 at 10:24 AM SelfishSeahorse <selfishseahorse at gmail.com>

> On Mon, 8 Oct 2018 at 13:55, SelfishSeahorse <selfishseahorse at gmail.com>
> wrote:
> >
> > On Mon, 8 Oct 2018 at 13:13, Martin Koppenhoefer <dieterdreist at gmail.com>
> wrote:
> > >
> > > A very similar problem are parts of lakes by the way, e.g. look at
> this map of the lake of Constance, showing names for parts of the lake:
> https://de.wikipedia.org/wiki/Bodensee#/media/File:Bodensee_satellit%2Btext.png
> > > (or maybe the "lake" in this case is a group of lakes as well).
> >
> > This problem could be solved with *:part=* areas (in this example
> > natural:part=lake), analogous to building:part=*.
> PS: Sorry, i meant natural:part=water (+ water=lake).
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