#!/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 2847.0 1407.0 27 56.25 -gcp 12528.0 1431.0 27.333333333333332 56.25 -gcp 12540.0 14559.0 27.333333333333332 56 -gcp 2742.0 14529.0 27 56 k_001_ktl2-1-85_101.jpg k_001_ktl2-1-85_101.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2847.0 1407.0\n12528.0 1431.0\n12540.0 14559.0\n2742.0 14529.0" | \
  gdaltransform -tps -output_xy k_001_ktl2-1-85_101.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  k_001_ktl2-1-85_101.vrt k_001_ktl2-1-85_101.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_101.cut.vrt k_001_ktl2-1-85_101.xyz