Hi I am going to merge all the multipolygon fixes. Including, if appropriate, the sea polygon changes. In addition to the patches sent to the list I also have permission to use the attached patch from Olaf Kähler which he describes as follows:
I guess, mkgmap has a bug with "vanishing islands" in case of multipolygons. The major problem seems to be, that in the polygon splitting process (PolygonSplitterBase.java), the Java awt methods mess around with the inner polygons, that were previously merged into the outer polygons. I included a patch, that somewhat works, but still seems to have a few issues. I've also included sample .osm files to explain these issues:
I'd appreciate it if anyone who understands the polygon issues takes a look at the patch. Also if you have an test cases which don't work with the current trunk but might be fixed by the outstanding patches let me know. ..Steve