Reporter: travelling_salesman
[Submitted to the original trac issue database at 7.31pm, Tuesday, 11th June 2013]

Every few weeks I find a destroyed multipolygon relation in my mapping area, of which segements are deleted so that mapnik cannot render them anymore. The associated editor is always potlach2. And the responsible mappers are always unaware of the damage they do. This is because potlach2 doesn't make clear enough that a way is part of a multipolygon relation and doesn't give proper warnings when a multipolygon is invalidated. JOSM for instance performs a validity check when uploading.

Please include clear warnings in potlach2 to alert mappers if they are about to invalidate a multipolygon or show it much clearer if a way's role is to be part of a multipolygon.

Thank you!