[Tagging] Open Defecation Areas
Paul Allen
pla16021 at gmail.com
Tue Sep 10 22:54:34 UTC 2019
On Tue, 10 Sep 2019 at 23:41, Graeme Fitzpatrick <graemefitz1 at gmail.com>
wrote:
>
> Would it need a multipolygon? My impression of the ODA is an open patch of
> ground in / beside a residential area. If that is the case, wouldn't it be
> much simpler to just mark a new area in as landuse=o_d_a? (accept it
> wouldn't be abbreviated)
>
Overlapping landuse often works, but only because the carto people juggle
z-indexes
to make it work. They're not overly happy doing that, I believe. It also
doesn't always
work well: if ever you've put a pond in a wood without a multipolygon you
get
waterlogged trees. It also makes database queries somewhat more simpler
if you're
asking what is at point A and you get one answer rather than two answers,
or one of
two answers chosen at random. A multipolygon is a little more work for the
mapper,
but not much more.
Now I expect both the carto and db people to tell me I'm wrong about that.
If they do,
I'll just point out that it's not wrong to use a multipolygon for this.
--
Paul
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