#!/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 2883.0 1419.0 28 56.75 -gcp 12396.0 1428.0 28.333333333333332 56.75 -gcp 12441.0 14553.0 28.333333333333332 56.5 -gcp 2823.0 14547.0 28 56.5 k_001_ktl2-1-85_127.jpg k_001_ktl2-1-85_127.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2883.0 1419.0\n12396.0 1428.0\n12441.0 14553.0\n2823.0 14547.0" | \
  gdaltransform -tps -output_xy k_001_ktl2-1-85_127.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  k_001_ktl2-1-85_127.vrt k_001_ktl2-1-85_127.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_127.cut.vrt k_001_ktl2-1-85_127.xyz