#!/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 26.834551126480108 57.39518372447694 -gcp 10521.0 0.0 26.835044652938848 57.3687583629357 -gcp 10521.0 10635.0 26.78600427436829 57.36867737732347 -gcp 0.0 10635.0 26.786025732040407 57.394859943694854 Aluksne-1989-1186/Aluksne-1989-1186-116.jpg Aluksne-1989-1186-116.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1041.0 990.0\n9459.0 984.0\n9450.0 9495.0\n1023.0 9504.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-116.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-116.vrt Aluksne-1989-1186-116.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-116.cut.vrt Aluksne-1989-1186-116.xyz