#!/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 21.372581720352176 56.68273109457638 -gcp 10581.0 0.0 21.372474431992 56.655394975609 -gcp 10581.0 12033.0 21.315906643867 56.655389078254 -gcp 0.0 12033.0 21.316147261264 56.682860490266 Aizpute-1988-991/Aizpute-1988-991-118.jpg Aizpute-1988-991-118.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "414.0 786.0\n10266.0 558.0\n10485.0 10449.0\n627.0 10669.5" | \
  gdaltransform -tps -output_xy Aizpute-1988-991-118.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aizpute-1988-991-118.vrt Aizpute-1988-991-118.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aizpute-1988-991-118.cut.vrt Aizpute-1988-991-118.xyz