#!/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 21.327906847000122 56.5117574878494 -gcp 11037.0 0.0 21.323647499084476 56.4836279813425 -gcp 11037.0 12933.0 21.26402735710144 56.4865070321747 -gcp 0.0 12933.0 21.2685763835907 56.51461664602089 Aizpute-1988-991/Aizpute-1988-991-11.jpg Aizpute-1988-991-11.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "0.0 1659.0\n840.0 11533.5\n10659.0 10521.0\n9630.0 642.0" | \
  gdaltransform -tps -output_xy Aizpute-1988-991-11.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aizpute-1988-991-11.vrt Aizpute-1988-991-11.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aizpute-1988-991-11.cut.vrt Aizpute-1988-991-11.xyz