#!/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 1164.0 522.0 24.837216666666666 57 -gcp 8316.0 465.0 25.337216666666666 57 -gcp 8379.0 7014.0 25.337216666666666 56.75 -gcp 1188.0 7062.0 24.837216666666666 56.75 lnb/src3/raw/27342249.jpg 27342249.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1164.0 522.0\n8316.0 465.0\n8379.0 7014.0\n1188.0 7062.0" | \
  gdaltransform -tps -output_xy 27342249.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  27342249.vrt 27342249.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 27342249.cut.vrt 27342249.xyz