On Oct 13, 2012 11:12 AM, "sly (sylvain letuffe)" <li...@letuffe.org> wrote: > In response to this change on the wiki : > http://wiki.openstreetmap.org/w/index.php?title=Relation%3Amultipolygon&action=historysubmit&diff=820392&oldid=797879
I mostly agree with the added text, with the following criticism: it's a very mathematical way of saying what shouldn't need to be said in the first place. It should be obvious that a valid multipolygon relation unambiguously defines a polygonal region, and I wasn't aware it was necessary to explicitly declare all the subconditions required to achieve that result. I think the mappers who might break a multipolygon's validity probably don't have the patience to read through several rules written in math-speak. Perhaps it would be better to show counterexamples to each "rule", and how to remedy each one (assuming the mapper actually knows what region the multipolygon should cover -- because if the relation is broken, software can't know).
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