Hi Andrzej, I think with unzipped hgt files the only limit is the memory that is needed to store the data for the tiles before they are written to img. So, with --max-jobs=4 or higher and all jobs with large tiles containing large amounts of data for RGN,NOD,NET etc. it is much more likely that the additional data for DEM causes trouble. I've not yet tried to reduce the memory for this temp. data, a possible alternative is to write it to temp files instead of storing it in buffers. This is esp. true for large tiles were DEM can be > 100MB while the other files cannot grow > 16MB. Gerd ________________________________________ Von: mkgmap-dev <mkgmap-dev-bounces@lists.mkgmap.org.uk> im Auftrag von Andrzej Popowski <popej@poczta.onet.pl> Gesendet: Montag, 8. Januar 2018 21:04:48 An: mkgmap-dev@lists.mkgmap.org.uk Betreff: Re: [mkgmap-dev] Performance with zipped hgt files Hi Gerd, I decided for 11.25 (=360/32) because of memory limits in early BuildDemFile. Maybe this is not a problem for mkgmap? -- Best regards, Andrzej _______________________________________________ mkgmap-dev mailing list mkgmap-dev@lists.mkgmap.org.uk http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev