#!/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 1795.5 1296.9438718662955 26 56.75 -gcp 13315.5 1338.1149025069637 26.5 56.75 -gcp 13337.25 11851.779108635097 26.5 56.5 -gcp 1737.75 11809.16155988858 26 56.5 76-Laudona_1939.jpg 76-Laudona_1939.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"1795.5 1296.9438718662955\n13315.5 1338.1149025069637\n13337.25 11851.779108635097\n1737.75 11809.16155988858\" | \
  gdaltransform -tps -output_xy 76-Laudona_1939.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  76-Laudona_1939.vrt 76-Laudona_1939.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 76-Laudona_1939.cut.vrt 76-Laudona_1939.xyz