Hi John, please use r4406 or later, see also http://www.mkgmap.org.uk/websvn/revision.php?repname=mkgmap&rev=4405 http://www.mkgmap.org.uk/websvn/revision.php?repname=mkgmap&rev=4406 Should have seen this problem before, seems I looked only at routing / search issues before committing r4360 :( Gerd ________________________________________ Von: Gerd Petermann <gpetermann_muenchen@hotmail.com> Gesendet: Mittwoch, 8. Januar 2020 18:56 An: john@the-thorns.org.uk Betreff: AW: MKGMAP lost precision. Hi John, thanks for reporting. I can reproduce the error but I do not yet see where it is. Looks like mkgmap is dropping on point in each shape. Will have a closer look tomorrow. Gerd ________________________________________ Von: John Thorn <johnrthorn@gmail.com> Gesendet: Mittwoch, 8. Januar 2020 18:04 An: Gerd Petermann Betreff: MKGMAP lost precision. Hi Gerd, I decided it was time to install a more recent version of MKGMAP. I have been running 4286 but downloaded 4398. My maps contain the Microsoft/Bing building outlines for the US so I am using Level0=24. With 4286 the result is good (screenshot 704) with 4398 the rectangles have become triangles as if precision is being lost (705). I am compiling from .MP files and a typical building is : [POLYGON] ; RhodeIsland.geojson 161666 EndLevel=3 Type=0x13 Data0=(41.682688,-71.277508),(41.682688,-71.277476),(41.682596,-71.277476),(41.682596,-71.277366),(41.682748,-71.277366),(41.682748,-71.277508),(41.682688,-71.277508) [END] Regards, John