#!/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 2862.0 1503.0 22 56.75 -gcp 12408.0 1506.0 22.333333333333332 56.75 -gcp 12459.0 14658.0 22.333333333333332 56.5 -gcp 2793.0 14652.0 22 56.5 k_001_ktl2-1-85_018.jpg k_001_ktl2-1-85_018.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2862.0 1503.0\n12408.0 1506.0\n12459.0 14658.0\n2793.0 14652.0" | \
  gdaltransform -tps -output_xy k_001_ktl2-1-85_018.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  k_001_ktl2-1-85_018.vrt k_001_ktl2-1-85_018.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES k_001_ktl2-1-85_018.cut.vrt k_001_ktl2-1-85_018.xyz