#!/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 2001.0 645.0 21.666666666666668 57.25 -gcp 11412.0 651.0 22 57.25 -gcp 11454.0 13791.0 22 57 -gcp 1920.0 13776.0 21.666666666666668 57 k_001_ktl2-1-85-a_012.jpg k_001_ktl2-1-85-a_012.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2001.0 645.0\n11412.0 651.0\n11454.0 13791.0\n1920.0 13776.0" | \
  gdaltransform -tps -output_xy k_001_ktl2-1-85-a_012.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  k_001_ktl2-1-85-a_012.vrt k_001_ktl2-1-85-a_012.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_012.cut.vrt k_001_ktl2-1-85-a_012.xyz