#!/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 27.03054805375166 57.34575297083727 -gcp 11346.0 0.0 27.025761803422157 57.31717846158743 -gcp 11346.0 11532.0 26.97410329449304 57.32037797217398 -gcp 0.0 11532.0 26.97788639865107 57.34761758110188 Aluksne-1989-1186/Aluksne-1989-1186-31.jpg Aluksne-1989-1186-31.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "891.0 2226.0\n9249.0 1134.0\n10329.0 9579.0\n1975.5 10657.5" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-31.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-31.vrt Aluksne-1989-1186-31.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-31.cut.vrt Aluksne-1989-1186-31.xyz