[Tagging] Relation for place archipelago with members place island

Paul Allen pla16021 at gmail.com
Sat Dec 14 23:12:57 UTC 2019

On Sat, 14 Dec 2019 at 22:27, Martin Koppenhoefer <dieterdreist at gmail.com>

Looking at the individual islands, it is kind of problematic that the
> linear coastline and the area place=island are not distinguishable: you
> can’t tell whether that’s the name of the coastline or the island or both,
> e.g. here
> https://www.openstreetmap.org/way/55553932#map=8/-3.222/144.098

You could go with the one object/one way method.  Draw an area for the
place=island.  On top of
that draw a closed way for the coastline.  It's extra work, and a bit
tedious, but not too bad.  However,
the problem with that is when it becomes necessary to alter one object but
not the other (such as
adding tags to make the island a nature reserve) as iD makes that harder
than it need be (I have
no idea how josm handles it as I find it a worse fit to my way of thinking
than iD).

Unless I've missed something (always possible) iD has no way of selecting
one of two or more
coincident objects: you get whichever one it decides to give you.  If
either of the objects has one
node that isn't shared with the other, then you can hunt around for a line
segment that gives you
the object you want.  If not, you have to disconnect a node, move it a
little way, so you have line
segments that aren't shared (you may have to move more than one node if
there are more than
two object, it depends how lucky you are), make your changes, then move the
node(s) back.

Actually, it's also a problem with objects that aren't entirely coincident,
if they're large, such as
forest bounding a heath..  You may have to move the map a long way to find
where they diverge
so that you can select one rather than the other.

What is obviously needed in iD is something like assigning control-click to
cycle through the
possible coincident objects.  I suggested as much many months ago, but it
was ignored.  And
that was before I seemed to have entered iD's general "ignore these people"
list for disagreeing
with them about something.

The above is somewhat off-topic here, especially as iD has effectively
added this mailing
list to its "ignore these people" list, but editor UIs influence tagging
decisions by mappers.
It may be desirable to use two objects to handle islands but if editors
make it a pain then it will
rarely happen.

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