#!/bin/bash

GDAL_TILE_PROCESSES=16
GDAL_TILE_ZOOMS=8-14
GDAL_SAMPLING_WARP=cubic
GDAL_SAMPLING_TILE=antialias

# Create virtual dataset with coordinates
gdal_translate -of VRT -a_srs EPSG:4326 -outsize 300% 300% -gcp 1938.0 1593.0 24.337216666666666 57 -gcp 12855.0 1464.0 25.337216666666666 57 -gcp 12996.0 11466.0 25.337216666666666 56.5 -gcp 1974.0 11505.0 24.337216666666666 56.5 lnb/27352326.jpg 27352326.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1938.0 1593.0\n12855.0 1464.0\n12996.0 11466.0\n1974.0 11505.0" | \
  gdaltransform -tps -output_xy 27352326.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  27352326.vrt 27352326.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 27352326.cut.vrt 27352326.xyz