Possible bug in tag transfer from outer way to multipolygon relation

[mboeringa]

Hi Thomas,

We've been working on the proper loading of multipolygon relations and the transfer of tags from outer ways to a multipolygon relation in issues #65 and #72.

Now I encountered a potential issue I hadn't clearly seen or realized before with the latest DLL's you send in December.

What I see happening is that if a key's name ("wetland"), is also a tag value, then this key is not (always?) properly transferred to the multipolygon relation.

E.g. if an outer's tags are: natural=wetland wetland=tidalflat

Then the multipolygon relation will just have: natural=wetland

So the wetland=tidalflat tag is omitted.

EDIT : I now noticed that also other tags (in this case a name=x tag) don't seem to be transferred. In ArcGIS I am seeing the natural=wetland main tag, but neither the wetland=tidalflat and name=x. I do see them on the outer way which is properly set to osmSupportingElement=yes.

A relation where I see this clearly happening is this one: https://www.openstreetmap.org/relation/4430683

Is there a potential fix for this in #110? If not, this definitely needs work, as this type of tagging is quite common. I am actually not entirely sure the issue is caused by the wetland tag, but this is what is a bit peculiar about this polygon's tagging, and I saw the same issue on another wetland feature nearby having the same type of tagging.

See the attached images from within ArcGIS. Don't mind the change in polygon styling: it is the same feature, I just changed styling. Notice how the wetland tag is missing. Also (not visible in the screenshots), as I wrote above, the "name" tag is missing.

[mboeringa]

Great!, thanks. Looking forward to using the latest version of the tools.