Hi Gerd, The data wasn't cached in BaseCamp (I have just done Ctrl+G twice to make sure). However, I had built using --gmapsupp rather than --gmapi, and copied the gmapsupp.img file to an SD card. I have tried using --gmapi and the results are correct there. I have also tried installing the registry settings and that works OK as well, so it looks like a problem specific to gmapsupp. Regards, Mike -----Original Message----- From: Gerd Petermann [mailto:gpetermann_muenchen@hotmail.com] Sent: 18 February 2021 07:57 To: Development list for mkgmap <mkgmap-dev@lists.mkgmap.org.uk> Subject: Re: [mkgmap-dev] map boundary error Hi Mike, I cannot reproduce your result with the command java -jar mkgmap.jar -gmapi test.osm. I assume you look at cached data. Did you press Ctrl+G 2 times? Gerd ________________________________________ Von: mkgmap-dev <mkgmap-dev-bounces@lists.mkgmap.org.uk> im Auftrag von Mike Baggaley <mike@tvage.co.uk> Gesendet: Donnerstag, 18. Februar 2021 01:03 An: 'Development list for mkgmap' Betreff: [mkgmap-dev] map boundary error Hi all, In creating a small test file I seem to have found an issue. The attached OSM file has just 3 points and two ways form a right-angled triangle. In the attached BaseCamp image, the blue line is the boundary of the map. Its vertical lines contain the ways, but the horizontal lines do not. I can also see that the road in the underlying base map enters into the blue rectangle, suggesting that the blue line is not where the map boundary actually is. How does this boundary line get created Cheers, Mike