#!/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 2799.0 1455.0 21.666666666666668 56.5 -gcp 12390.0 1431.0 22 56.5 -gcp 12462.0 14553.0 22 56.25 -gcp 2760.0 14562.0 21.666666666666668 56.25 k_001_ktl2-1-85_005.jpg k_001_ktl2-1-85_005.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2799.0 1455.0\n12390.0 1431.0\n12462.0 14553.0\n2760.0 14562.0" | \
  gdaltransform -tps -output_xy k_001_ktl2-1-85_005.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  k_001_ktl2-1-85_005.vrt k_001_ktl2-1-85_005.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_005.cut.vrt k_001_ktl2-1-85_005.xyz