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#1 2019-08-18 11:10:01

DerGuteMercator
Member
Registered: 2017-07-14
Posts: 3

Convert a multipolygon relation into a regular polygon

I can convert a usual polygon into a multi-polygon quite easily with Ctrl-B. All tags of te polygon become tags of the new relation.

But how do I do the opposite? Currentyl I have a lot of relations that consist of a single polygon, and I want to remove the relation and have all tags moved to the polygon.

Is there any way to achieve that?

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#2 2019-08-18 12:03:48

MikeN
Member
Registered: 2009-09-03
Posts: 309

Re: Convert a multipolygon relation into a regular polygon

There's a JOSM plugin called "relation toolbox" (reltoolbox) that lets you do this. You have to select a relation and then you can right-click on the relation in the relation toolbox panel and select "reconstruct multipolygon".

It's best to confine such changes to a small area unless all nearby mappers agree that it is needed.   Otherwise the next mapper is likely to come along and convert all adjoining polygons back to multipolygons.

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#3 2019-08-18 13:19:40

DerGuteMercator
Member
Registered: 2017-07-14
Posts: 3

Re: Convert a multipolygon relation into a regular polygon

Thanks, I'll try that.

Don't think that anyone would convert it back - these are remainers of a huge automatic import that often created unnecessary multipolygons.

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