#!/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 2127.0 696.0 22 57.75 -gcp 11418.0 693.0 22.333333333333332 57.75 -gcp 11475.0 13848.0 22.333333333333332 57.5 -gcp 2064.0 13842.0 22 57.5 k_001_ktl2-1-85-a_025.jpg k_001_ktl2-1-85-a_025.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2127.0 696.0\n11418.0 693.0\n11475.0 13848.0\n2064.0 13842.0" | \
  gdaltransform -tps -output_xy k_001_ktl2-1-85-a_025.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  k_001_ktl2-1-85-a_025.vrt k_001_ktl2-1-85-a_025.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_025.cut.vrt k_001_ktl2-1-85-a_025.xyz