Version mkgmap-r3808 was committed by gerd on Wed, 15 Feb 2017 improve performance of ShapeMergeFilter The old code didn't work well when many (e.g. 1000+) distinct similar shapes were processed (e.g. buildings). This typically happens only when style adds shapes at low resolutions. http://www.mkgmap.org.uk/websvn/revision.php?repname=mkgmap&rev=3808