Sounds great Steve! I will try it on the whole Benelux and with other water features too (drain, river, stream, dam). I have made a poi list of 'problem' areas so I can check the results.
Hi
Attached is my latest version of the patch.
I've tried it out on the Netherlands with this style:
<<<version>>> 0 <<<lines>>> waterway=canal & natural!=water [0x1f resolution 18 continue]
<<<polygons>>> waterway=canal [0x3c resolution 18]
Before the patch there are numerous obvious problems where waterways cross the tile boundaries, but I am unable to find a single one with the patch.
This patch differs from the first, now the isClosed() routine works exactly the same as before *except* when the way is incomplete, in which case the previously set closed flag is returned.
So all generated ways (coastlines, multipolygons etc) should be unaffected, and of course all generated polygons should be complete, unless they were derived from incomplete ways.
Pre-built jar at: http://files.mkgmap.org.uk/download/74/mkgmap.jar
..Steve
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