#!/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 897.375 887.25 22.57293647 57.77476219 -gcp 9678.375 883.875 22.63543693 57.77476321 -gcp 9682.6875 11881.6875 22.6354393 57.73309595 -gcp 895.3125 11881.125 22.57293884 57.73309493 k_001_ktl2-0-132_0020.jpg k_001_ktl2-0-132_0020.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "897.375 887.25\n9678.375 883.875\n9682.6875 11881.6875\n895.3125 11881.125" | \
  gdaltransform -tps -output_xy k_001_ktl2-0-132_0020.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  k_001_ktl2-0-132_0020.vrt k_001_ktl2-0-132_0020.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES k_001_ktl2-0-132_0020.cut.vrt k_001_ktl2-0-132_0020.xyz