#!/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 0.0 0.0 26.05966901267188 57.01789813436153 -gcp 14280.0 0.0 26.39301873636909 57.01719522764426 -gcp 14280.0 16383.0 26.389695405804368 56.80920904869186 -gcp 0.0 16383.0 26.057839535824186 56.8101488898562 193-Madona_1925.jpg 193-Madona_1925.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"2880.0 1395.0\n2952.75 14535.375208217656\n11553.0 14488.500832870628\n11451.0 1362.0\" | \
  gdaltransform -tps -output_xy 193-Madona_1925.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  193-Madona_1925.vrt 193-Madona_1925.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 193-Madona_1925.cut.vrt 193-Madona_1925.xyz