Hi Andrzej, I agree that it makes no sense to align to hgt when Garmin uses 0,0 as base and data is far away from this point. Probably it is a good idea to think about the way how the Garmin software can determine what data it has to read to render a given rectangle. What makes you think that 0,0 is used instead of the upper left cornen given in the DEM section header(s)? Gerd ________________________________________ Von: mkgmap-dev <mkgmap-dev-bounces@lists.mkgmap.org.uk> im Auftrag von Andrzej Popowski <popej@poczta.onet.pl> Gesendet: Freitag, 19. Januar 2018 17:06:42 An: mkgmap-dev@lists.mkgmap.org.uk Betreff: Re: [mkgmap-dev] splitter r586 still doesn't always align properly with --align-for-dem option Hi Gerd, my current opinion is, that aligning to HGT won't work. The way Garmin sets coordinates in DEM suggests, that all DEM is aligned to coordinates 0;0. Since pixel distance for DEM can be set exactly as in HGT, the farther form 0;0 the bigger misalignment. Then at some point could appear a shift of DEM, like we have already observed for unaligned versions. I estimate, that for dem-dists=9942 this could be above 80 degree. -- Best regards, Andrzej _______________________________________________ mkgmap-dev mailing list mkgmap-dev@lists.mkgmap.org.uk http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev