#!/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 21.254360675812 56.617579877267 -gcp 10503.0 0.0 21.253910064697 56.590432794899 -gcp 10503.0 12234.0 21.197122335434 56.590887670674 -gcp 0.0 12234.0 21.197240352631 56.61774516844 Aizpute-1988-991/Aizpute-1988-991-69.jpg Aizpute-1988-991-69.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "93.0 948.0\n9948.0 660.0\n10243.5 10564.5\n339.0 10831.5" | \
  gdaltransform -tps -output_xy Aizpute-1988-991-69.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aizpute-1988-991-69.vrt Aizpute-1988-991-69.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aizpute-1988-991-69.cut.vrt Aizpute-1988-991-69.xyz