1) copy originals from alesund dtm1 (33-109-135) and bathymetry5m (RC007C004)
2) Crop the image
docker run --rm -v /mnt/data/srv/carto_private/08_TEST/minecraft/alesund:/home osgeo/gdal gdalwarp -t_srs EPSG:3857 -dstnodata 0 -ot Float16 \
 /home/originals/33-109-135.tif home/originals/33-109-135_COG.tif -of COG  -co TILING_SCHEME=Custom