#!/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 1815.0 1143.0 20.837216666666666 57 -gcp 12549.0 1140.0 21.337216666666666 57 -gcp 12612.0 10890.0 21.337216666666666 56.75 -gcp 1794.0 10905.0 20.837216666666666 56.75 lnb/src1/raw/27342265.jpg 27342265.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1815.0 1143.0\n12549.0 1140.0\n12612.0 10890.0\n1794.0 10905.0" | \
  gdaltransform -tps -output_xy 27342265.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  27342265.vrt 27342265.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 27342265.cut.vrt 27342265.xyz