[OSM-dev] Shared borders of (multi) polygons represented as duplicated ways

[Paul Norman]

On 11/24/2014 9:29 AM, Jochen Topf wrote:
> But in a more complex case with more nodes and maybe some other lines
> involved, we probably want two multipolygons which share a way D-C (and have
> separate ways D-A-B-C and D-E-F-C, respectively), don't we? But then we have
> to split up those linestrings.

No - multipolygons which do not consist entirely of closed ways are not 
generally desirable in the output. I wouldn't mind a switch to do that 
kind of splitting, which would cover the simple case you outlined too, 
but it wouldn't be the default.