#!/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 21.382229080834 56.536810123837 -gcp 11064.0 0.0 21.385653027849 56.508644553032 -gcp 11064.0 12672.0 21.32758734948 56.506525292191 -gcp 0.0 12672.0 21.324184860137 56.534335638375 Aizpute-1988-991/Aizpute-1988-991-20.jpg Aizpute-1988-991-20.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "852.0 978.0\n480.0 10848.0\n10356.0 11202.0\n10692.0 1320.0" | \
  gdaltransform -tps -output_xy Aizpute-1988-991-20.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aizpute-1988-991-20.vrt Aizpute-1988-991-20.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aizpute-1988-991-20.cut.vrt Aizpute-1988-991-20.xyz