Hi! First tests indicate that your patch is working great :). Thanks a lot for fixing this bug :) best regards Michal Rogala 2014-04-02 17:50 GMT+02:00 Steve Ratcliffe <steve@parabola.me.uk>:
Hi Michał
I believe that I have now found the problem thanks to your example. If I'm right, then the problem occurs when there are some cities that do not have a country assigned and also that the total number of cities is greater than 64k and the number of cities with a country is less than that.
So it is mostly just unlucky based on the amount of data. With a perfect bounds file, then every city should have a country and the problem would not happen I think, so there was probably some significance about the tiles being at the edge in a different country.
If not using a bounds file, then the problem is much more likely to happen and may explain why I often see problems with maps without bounds files.
The fix is on the sort2 branch at r3163 or greater: http://www.mkgmap.org.uk/download/mkgmap-sort2-r3163.zip
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