#!/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 2187.0 1395.0 20.958333333333332 56.25 -gcp 13053.0 1347.0 21.333333333333332 56.25 -gcp 13158.0 14487.0 21.333333333333332 56 -gcp 2160.0 14517.0 20.958333333333332 56 k_001_ktl2-1-85_002.jpg k_001_ktl2-1-85_002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2187.0 1395.0\n13053.0 1347.0\n13158.0 14487.0\n2160.0 14517.0" | \
  gdaltransform -tps -output_xy k_001_ktl2-1-85_002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  k_001_ktl2-1-85_002.vrt k_001_ktl2-1-85_002.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_002.cut.vrt k_001_ktl2-1-85_002.xyz