#!/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 1314.0 1011.0 26.837216666666666 56.5 -gcp 12162.0 921.0 27.337216666666666 56.5 -gcp 12276.0 10689.0 27.337216666666666 56.25 -gcp 1356.0 10761.0 26.837216666666666 56.25 lnb/src2/raw/27342226.jpg 27342226.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1314.0 1011.0\n12162.0 921.0\n12276.0 10689.0\n1356.0 10761.0" | \
  gdaltransform -tps -output_xy 27342226.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  27342226.vrt 27342226.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 27342226.cut.vrt 27342226.xyz