#!/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 26.95941925048828 57.65732978891951 -gcp 10485.0 0.0 26.95931196212769 57.63084849113914 -gcp 10485.0 13266.0 26.89560413360596 57.630837003297806 -gcp 0.0 13266.0 26.895775794982914 57.65781192311411 Aluksne-1989-1185/Aluksne-1989-1185-56.jpg Aluksne-1989-1185-56.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1008.0 969.0\n9519.0 1005.0\n9447.0 9447.0\n964.875 9414.75" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-56.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-56.vrt Aluksne-1989-1185-56.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-56.cut.vrt Aluksne-1989-1185-56.xyz