#!/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 1341.0 1020.0 24.337216666666666 56 -gcp 12357.0 990.0 24.837216666666666 56 -gcp 12423.0 10788.0 24.837216666666666 55.75 -gcp 1320.0 10800.0 24.337216666666666 55.75 lnb/src3/raw/27342247.jpg 27342247.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1341.0 1020.0\n12357.0 990.0\n12423.0 10788.0\n1320.0 10800.0" | \
  gdaltransform -tps -output_xy 27342247.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  27342247.vrt 27342247.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 27342247.cut.vrt 27342247.xyz