#!/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 1245.0 672.0 22.837216666666666 56.75 -gcp 8436.0 651.0 23.337216666666666 56.75 -gcp 8487.0 7197.0 23.337216666666666 56.5 -gcp 1242.0 7215.0 22.837216666666666 56.5 lnb/src2/raw/27342205.jpg 27342205.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1245.0 672.0\n8436.0 651.0\n8487.0 7197.0\n1242.0 7215.0" | \
  gdaltransform -tps -output_xy 27342205.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  27342205.vrt 27342205.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 27342205.cut.vrt 27342205.xyz