Re: [mkgmap-dev] HGT - getElevation()

Hi Gerd, I have executed your script and looked at maps. I have tested them with artificial HGT too. Only the original-unaligned map has DEM at wrong position. It is moved by about 0.00033 degree right and down. I looked at offset calculated as (DEM coordinate)%(dem-dist) and only for this map, offset was bigger than half of dem-dist. Any attempt to align HGT with data reduce this offset, but it still remain quite big, like 1300-3600, while dem-dist is 9942. My guess is, that Mapsource/BaseCamp calculate DEM pixel positions globally, basing on dem-dist. If coordinates of DEM layers aren't aligned with with dem-dist and misalignment is too big, than Mapsource can fetch wrong DEM values. -- Best regards, Andrzej