#!/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 26.896701055526737 57.68137701414929 -gcp 10485.0 0.0 26.897575455665592 57.65565277277682 -gcp 10485.0 13266.0 26.835704841623823 57.65530540856721 -gcp 0.0 13266.0 26.835909649172105 57.68097475011135 Aluksne-1989-1185/Aluksne-1989-1185-17.jpg Aluksne-1989-1185-17.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1008.0 1038.0\n9477.0 990.0\n9522.0 9417.0\n1038.0 9459.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-17.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-17.vrt Aluksne-1989-1185-17.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-17.cut.vrt Aluksne-1989-1185-17.xyz