#!/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 1173.0 474.0 23.837216666666666 57.25 -gcp 8280.0 468.0 24.337216666666666 57.25 -gcp 8295.0 7020.0 24.337216666666666 57 -gcp 1137.0 7032.0 23.837216666666666 57 lnb/src3/raw/27342240.jpg 27342240.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1173.0 474.0\n8280.0 468.0\n8295.0 7020.0\n1137.0 7032.0" | \
  gdaltransform -tps -output_xy 27342240.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  27342240.vrt 27342240.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 27342240.cut.vrt 27342240.xyz