#!/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 2829.0 1386.0 27 57.5 -gcp 16971.0 1365.0 27.333333333333332 57.5 -gcp 17064.0 21102.0 27.333333333333332 57.25 -gcp 2826.0 21132.0 27 57.25 k_001_ktl2-1-85_108-a.jpg k_001_ktl2-1-85_108-a.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2829.0 1386.0\n16971.0 1365.0\n17064.0 21102.0\n2826.0 21132.0" | \
  gdaltransform -tps -output_xy k_001_ktl2-1-85_108-a.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  k_001_ktl2-1-85_108-a.vrt k_001_ktl2-1-85_108-a.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_108-a.cut.vrt k_001_ktl2-1-85_108-a.xyz