#!/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 1121.25 1185.0885793871867 23.5 57.05 -gcp 11886.0 1230.0935933147632 24 57.05 -gcp 11912.25 13154.465181058495 24 56.75 -gcp 1053.75 13117.021169916436 23.5 56.75 32-Sloka_1940.jpg 32-Sloka_1940.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"1121.25 1185.0885793871867\n11886.0 1230.0935933147632\n11912.25 13154.465181058495\n1053.75 13117.021169916436\" | \
  gdaltransform -tps -output_xy 32-Sloka_1940.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  32-Sloka_1940.vrt 32-Sloka_1940.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 32-Sloka_1940.cut.vrt 32-Sloka_1940.xyz