#!/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 26.71013474464417 57.558362673722336 -gcp 10479.0 0.0 26.710907220840458 57.53174007487514 -gcp 10479.0 10608.0 26.660749912261966 57.53128506475108 -gcp 0.0 10608.0 26.660460233688358 57.558224544356676 Aluksne-1989-1185/Aluksne-1989-1185-169.jpg Aluksne-1989-1185-169.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "996.0 1035.0\n966.0 9576.0\n9405.0 9582.0\n9438.0 1041.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-169.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-169.vrt Aluksne-1989-1185-169.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-169.cut.vrt Aluksne-1989-1185-169.xyz