[Talk-us] Multipolygonizing

[Joel Holdsworth]

> 
> A longer version (I'll try). I assume we all agree that overlapping
> or not reaching polygons where there is adjacency on the ground is
> wrong. So how can we properly express adjacency? The simple way is
> to run two polygons through the same subset of nodes. The advanced
> is to separate this subset into a single line, which will now
> belong to two multipolygons. I will try to convince you that using
> advanced is easier, when it comes to "heavy" objects, like landuse=
> or natural=. Imagine someone has mapped a forest, with a good
> detail, precisely following its border with a farmland. Now you
> want to map this farmland. In the simple way you need to follow
> all nodes your predessor had drawn, clicking all the nodes, be it
> 25 nodes or 100. In the advanced way, you don't. You instantly
> reuse his line for your new polygon. This was a most typical example
> of benefits that advanced multipolygons provide.
> 


I use them for this all the time.