Hi Nop, I suggest a new option like --dem-file-pattern or something similar. Or maybe simply add the hardcoded prefix to the code which tries to find the file for the given lat/lon pair in HgtReader, we already have a few different versions reg. zipped files. Gerd ________________________________________ Von: mkgmap-dev <mkgmap-dev-bounces@lists.mkgmap.org.uk> im Auftrag von Nop <nop@wanderreitkarte.de> Gesendet: Samstag, 9. Oktober 2021 09:36 An: mkgmap-dev@lists.mkgmap.org.uk Betreff: [mkgmap-dev] Hardcoded naming scheme for DEM tiles Hi, I am trying to use the DEM/hillshading option. You can specify a path to the DEM tiles, but it seems that there is a hardcoded assumption about the naming format of the .hgt files. I want to use an existing set of .hgt files used by another application which has a slightly different naming convention - in this case just a prefix. Of course it would be possible to copy all files to a new name, but it seems rather wasteful to copy such a large amount of data just because of naming issues. So it would be very helpful to be able to not only specify a path but also a naming pattern to use, e.g. something like --dem=p:/dem/prefix_N{$lat.2}E{$lon.3}.hgt I would be willing to contribute the feature myself, but I am encountering difficulties - see separate mail. bye, Nop _______________________________________________ mkgmap-dev mailing list mkgmap-dev@lists.mkgmap.org.uk https://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev