#!/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 2028.0 678.0 22.998944333333334 56.49953333333333 -gcp 11640.0 660.0 23.332277666666666 56.49953333333333 -gcp 11718.0 13797.0 23.332277666666666 56.24953333333333 -gcp 2001.0 13806.0 22.998944333333334 56.24953333333333 k_001_ktl2-1-85-a_026.jpg k_001_ktl2-1-85-a_026.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2031.0 678.0\n11640.0 660.0\n11718.0 13797.0\n2001.0 13806.0" | \
  gdaltransform -tps -output_xy k_001_ktl2-1-85-a_026.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  k_001_ktl2-1-85-a_026.vrt k_001_ktl2-1-85-a_026.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-a_026.cut.vrt k_001_ktl2-1-85-a_026.xyz