#!/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 1386.0 597.0 24.337216666666666 57 -gcp 8538.0 564.0 24.837216666666666 57 -gcp 8610.0 7113.0 24.837216666666666 56.75 -gcp 1419.0 7149.0 24.337216666666666 56.75 lnb/src1/raw/27342321.jpg 27342321.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1386.0 597.0\n8538.0 564.0\n8610.0 7113.0\n1419.0 7149.0" | \
  gdaltransform -tps -output_xy 27342321.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  27342321.vrt 27342321.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 27342321.cut.vrt 27342321.xyz