[mkgmap-dev] Multipolygons and disappearing coastlines

Sat Dec 26 21:50:52 GMT 2009

Mark Burton schrieb:

> So, is putting the coastline into a multipolygon a reasonable OSM
> thing? 

A coastline is often also a boundary and boundaries are
multipolygons in OSM.

> If so, should mkgmap be breaking the coastline by removing its
> tags? If not, how do we fix that?

My guess is, that the multipolygon handling in mkgmap is not working
perfectly.

See an older thread on this list where I suggest a
workaround. (I check if the MP has no inner elements
and change the type=multipolygon to type=boundarypolygon
if this is the case).

Chris