#!/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 1521.0 705.0 24.837216666666666 55.75 -gcp 12669.0 798.0 25.337216666666666 55.75 -gcp 12618.0 10548.0 25.337216666666666 55.5 -gcp 1386.0 10461.0 24.837216666666666 55.5 lnb/src3/raw/27342255.jpg 27342255.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1521.0 705.0\n12669.0 798.0\n12618.0 10548.0\n1386.0 10461.0" | \
  gdaltransform -tps -output_xy 27342255.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  27342255.vrt 27342255.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 27342255.cut.vrt 27342255.xyz