#!/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 26.710767745971683 57.42068755405701 -gcp 11046.0 0.0 26.71210885047913 57.393091654235064 -gcp 11046.0 11109.0 26.660867929458625 57.392149275842584 -gcp 0.0 11109.0 26.659430265426636 57.420098605919634 Aluksne-1989-1186/Aluksne-1989-1186-169.jpg Aluksne-1989-1186-169.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1557.0 993.0\n9966.0 1479.0\n9456.0 9990.0\n1038.0 9498.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-169.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-169.vrt Aluksne-1989-1186-169.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-169.cut.vrt Aluksne-1989-1186-169.xyz