#!/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 26.902240247155525 57.56425665165146 -gcp 11610.0 0.0 26.895742127091467 57.53673346621929 -gcp 11610.0 11736.0 26.842865589949653 57.53988811713272 -gcp 0.0 11736.0 26.849205459681837 57.56780411215541 Aluksne-1989-1185/Aluksne-1989-1185-6.jpg Aluksne-1989-1185-6.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1014.0 2160.0\n9438.0 1101.0\n10473.0 9453.0\n2049.0 10512.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-6.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-6.vrt Aluksne-1989-1185-6.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-6.cut.vrt Aluksne-1989-1185-6.xyz