#!/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 26.773905730230982 57.515927251612815 -gcp 10485.0 0.0 26.77220185566891 57.489612701114886 -gcp 10485.0 13344.0 26.710172732049816 57.490547347216804 -gcp 0.0 13344.0 26.71187771778807 57.51694547381464 Aluksne-1989-1185/Aluksne-1989-1185-153.jpg Aluksne-1989-1185-153.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "984.0 963.0\n963.0 9492.0\n9408.0 9495.0\n9441.0 972.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-153.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-153.vrt Aluksne-1989-1185-153.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-153.cut.vrt Aluksne-1989-1185-153.xyz