#!/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 2025.0 1542.0 23.337216666666666 57.5 -gcp 12843.0 1488.0 24.337216666666666 57.5 -gcp 12951.0 11415.0 24.337216666666666 57 -gcp 2037.0 11475.0 23.337216666666666 57 lnb/27352320.jpg 27352320.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2025.0 1542.0\n12843.0 1488.0\n12951.0 11415.0\n2037.0 11475.0" | \
  gdaltransform -tps -output_xy 27352320.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  27352320.vrt 27352320.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 27352320.cut.vrt 27352320.xyz