#!/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 2127.0 729.0 25.332333333333334 57.499583333333334 -gcp 11454.0 708.0 25.665666666666667 57.499583333333334 -gcp 11547.0 13803.0 25.665666666666667 57.249583333333334 -gcp 2100.0 13818.0 25.332333333333334 57.249583333333334 k_001_ktl2-1-85-a_078.jpg k_001_ktl2-1-85-a_078.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2127.0 729.0\n11454.0 708.0\n11547.0 13803.0\n2100.0 13818.0" | \
  gdaltransform -tps -output_xy k_001_ktl2-1-85-a_078.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  k_001_ktl2-1-85-a_078.vrt k_001_ktl2-1-85-a_078.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_078.cut.vrt k_001_ktl2-1-85-a_078.xyz