#!/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 1884.0 1707.0 27.333333333333332 56 -gcp 11595.0 1710.0 27.666666666666668 56 -gcp 11616.0 14838.0 27.666666666666668 55.75 -gcp 1818.0 14838.0 27.333333333333332 55.75 k_001_ktl2-1-85_112.jpg k_001_ktl2-1-85_112.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1884.0 1707.0\n11595.0 1710.0\n11616.0 14838.0\n1818.0 14838.0" | \
  gdaltransform -tps -output_xy k_001_ktl2-1-85_112.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  k_001_ktl2-1-85_112.vrt k_001_ktl2-1-85_112.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_112.cut.vrt k_001_ktl2-1-85_112.xyz