#!/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 26.773137050628662 57.50537740837085 -gcp 10506.0 0.0 26.77176375961304 57.479410441580576 -gcp 10506.0 10626.0 26.72306041145325 57.48011405480059 -gcp 0.0 10626.0 26.72448734664917 57.50643801016693 Aluksne-1989-1186/Aluksne-1989-1186-136.jpg Aluksne-1989-1186-136.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1011.0 990.0\n9429.0 1053.0\n9342.0 9567.0\n933.0 9504.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-136.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-136.vrt Aluksne-1989-1186-136.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-136.cut.vrt Aluksne-1989-1186-136.xyz