#!/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 26.928189956632792 57.623162087143335 -gcp 10485.0 0.0 26.92756791687012 57.59762290391539 -gcp 10485.0 13266.0 26.86711605391327 57.59738469457974 -gcp 0.0 13266.0 26.86637127972104 57.623126289505656 Aluksne-1989-1185/Aluksne-1989-1185-24.jpg Aluksne-1989-1185-24.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1080.0 1035.0\n9570.0 1059.0\n9531.0 9492.0\n1032.0 9468.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-24.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-24.vrt Aluksne-1989-1185-24.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-24.cut.vrt Aluksne-1989-1185-24.xyz