#!/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 21.414495959084 56.659878244873 -gcp 10794.0 0.0 21.41397356987 56.632090277719 -gcp 10794.0 12225.0 21.357164382935 56.632559398115 -gcp 0.0 12225.0 21.357669195252 56.660213072044 Aizpute-1988-991/Aizpute-1988-991-103.jpg Aizpute-1988-991-103.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "271.5 744.0\n430.5 10627.5\n10302.0 10344.0\n9996.0 453.0" | \
  gdaltransform -tps -output_xy Aizpute-1988-991-103.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aizpute-1988-991-103.vrt Aizpute-1988-991-103.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aizpute-1988-991-103.cut.vrt Aizpute-1988-991-103.xyz