#!/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 2049.0 606.0 21 57 -gcp 11523.0 621.0 21.333333333333332 57 -gcp 11559.0 13752.0 21.333333333333332 56.75 -gcp 1962.0 13728.0 21 56.75 k_001_ktl2-1-85-a_003.jpg k_001_ktl2-1-85-a_003.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2049.0 606.0\n11523.0 621.0\n11559.0 13752.0\n1962.0 13728.0" | \
  gdaltransform -tps -output_xy k_001_ktl2-1-85-a_003.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  k_001_ktl2-1-85-a_003.vrt k_001_ktl2-1-85-a_003.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_003.cut.vrt k_001_ktl2-1-85-a_003.xyz