[HOT] Ocean in Latin America

[Philippe Verdy]

There's certainly a problem in the way the multipolygon for the
Orinoco river was created, without importing the water tags to it.
And there's a suspiscious connection between Orinono and the Amazon
via a tributary, creating an "island" in it. This multipolygon
requires fixes (Osmose and other QA tools can help detect where this
happens).
I suspect that the multipolygon for the Orinoco River was modifioed
recently to add too many riverbeds in it and not really belonging to
it. This multipolygon is certainly broken.
I joined the OSM French talk list. There may be QA tools to do that
(it's not easy to fix as this covers a very large area, only JOSM
experts can locate it, with the help of QA tools to locate the broken
areas and superfluous tags. This will require loading lot of data, and
JOSM running in a 64-bit Java VM with enough memory, plus a solid PC.

Le jeu. 19 mars 2020 à 18:20, Jorieke Vyncke
<jorieke.vyncke at gmail.com> a écrit :
>
>   Interesting!
> So is this an issue that can be fixed by the Humanitarian layer OSM France team? Or is it just a matter of updating OSM and waiting for the humaniarian layer to render it correctly?
> Thanks, Jorieke
>
> Op do 19 mrt. 2020 om 16:47 schreef Philippe Verdy <verdyp at gmail.com>:
>>
>> Most probably this is the "water bassin" of the Amazone river, which
>> was tagged incorrectly with some "water=*" that causes problems in
>> this rendering.
>> Water bassins for rivers (which do not include only riverbeds and
>> lakes/ponds, but also all surrounding lands whose drained waters on
>> soil are converging to rivers) should not use this tag.
>> This does not cause a problem however in the OSM Carto rendering. If
>> that tag was approved, then the rendering for humanitarian map should
>> be fixed (it is maintained by OSM France).
>> But if I look at the boundary, I only sea ways for small riverbeds.
>> So it is likely that some multipolygon for riverbeds areas of some
>> river has been broken and the renderers attempt to "close" it due to
>> holes, or that someone joined all these riverbeds into a single
>> multipolygon.
>> Given the size of the relation where it is used, this cannot be fixed in iD.
>> Note also that given the current delays in the OSM data servers for
>> data replication, this may be temporary and caused by lack of
>> synchronization of the slave database used by the French renderer for
>> HOT.
>>
>> Le jeu. 19 mars 2020 à 17:11, Jorieke Vyncke
>> <jorieke.vyncke at gmail.com> a écrit :
>> >
>> > Hello,
>> > Is there someone who knows why several countries in Latin America look like ocean on the humanitarian layer on OpenStreetMap? Check here: https://www.openstreetmap.org/#map=5/3.119/-61.436&layers=H
>> > Can someone fix that?
>> > Thanks!
>> > Jorieke
>> >
>> >
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