Consider what is written below, see also the figure

osm.wiki/Relation:multipolygon

Island within a hole
From the possibility of having multiple outer rings in one relation, it also follows that you can easily model "islands" within a hole:

<relation id="1">
<tag k="type" v="multipolygon" />
<member type="way" id="1" role="outer" />
<member type="way" id="2" role="inner" />
<member type="way" id="3" role="outer" />
</relation>

A construct like this would previously have required different multipolygon relations, one with way 1 being outer and way 2 being inner, as well as one with way 2 being outer and way 3 being inner. Such cascading is still needed when the "island" in the middle is something else than the area on the outside, but where the "island" is the same stuff it can just be made a hole in the hole. Beware though, that following this method, still a dual determination of the area mapped by way 3 will be created, as the hole and the island DO overlap!

Evidently your brain is superior to that of others.
I did not meditate your data, but simply specified that the holes in the inner area of the polygon are still forest in compliance with the rules of multipolygons.

In OSMI
http://tools.geofabrik.de/osmi/?view=areas&lon=15.80947&lat=47.73963&zoom=14&baselayer=Geofabrik%20Standard&opacity=0.67&overlays=duplicate_node%2Csingle_node_in_way%2Cduplicate_segment%2Cway_in_multiple_rings%2Cintersection%2Cintersecting_segments%2Cring_not_closed%2Ctouching_rings%2Crole_should_be_inner%2Crole_should_be_outer%2Cinner_with_same_tags%2Cways%2Cduplicate_node%2Csingle_node_in_way%2Cduplicate_segment%2Cway_in_multiple_rings%2Cintersection%2Cintersecting_segments%2Cring_not_closed%2Ctouching_rings%2Crole_should_be_inner%2Crole_should_be_outer%2Cinner_with_same_tags%2Cways

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Hallo,
Mit Ihrer Version des Multipolygons haben Sie interne Inseln mit nicht beschreibenden Löchern erstellt.

Deshalb warnt das OSMI vor dem Fehlen von Beschreibungen.

Die Regeln für die Konstruktion von Multipolygonen finden Sie hier:

osm.wiki/Relation:multipolygon

Insbesondere der Hinweis auf die "Island within a hole".

Hi,
With your version of multipolygon, you have created internal islands with nondescript holes.

This is why OSMI warns about the lack of description.

The rules to be adopted for constructing multipolygons are here:

osm.wiki/Relation:multipolygon

In particular the one referring to: "Island within a hole"

Salve,
Con la tua versione del multipoligono, hai creato delle isole interne con dei buchi non descritti.

Per questo OSMI avverte della mancanza di descrizione.

Le regole da adottare per la costruzione dei multipoligoni sono qui:

osm.wiki/Relation:multipolygon

In particolare quella riferita a:"Island within a hole"

Replica

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