#!/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 26.804369343850354 57.65074223571536 -gcp 10485.0 0.0 26.805811185977685 57.624266859954645 -gcp 10485.0 13344.0 26.744629301123187 57.6235437270928 -gcp 0.0 13344.0 26.742853618823307 57.649542252715726 Aluksne-1989-1185/Aluksne-1989-1185-133.jpg Aluksne-1989-1185-133.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1098.0 1029.0\n1032.0 9576.0\n9477.0 9630.0\n9537.0 1077.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-133.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-133.vrt Aluksne-1989-1185-133.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-133.cut.vrt Aluksne-1989-1185-133.xyz