#!/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 1323.0 663.0 21.837216666666666 57.75 -gcp 8331.0 693.0 22.337216666666666 57.75 -gcp 8325.0 7239.0 22.337216666666666 57.5 -gcp 1266.0 7206.0 21.837216666666666 57.5 lnb/src1/raw/27342282.jpg 27342282.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1323.0 663.0\n8331.0 693.0\n8325.0 7239.0\n1266.0 7206.0" | \
  gdaltransform -tps -output_xy 27342282.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  27342282.vrt 27342282.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 27342282.cut.vrt 27342282.xyz