#!/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 27.020830551774228 57.66484298212609 -gcp 10485.0 0.0 27.020863294601444 57.63877421487264 -gcp 10485.0 13326.0 26.958413177477258 57.63870119522566 -gcp 0.0 13326.0 26.959137528498935 57.66527079648046 Aluksne-1989-1185/Aluksne-1989-1185-91.jpg Aluksne-1989-1185-91.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1014.0 1020.0\n1044.0 9525.0\n9471.0 9477.0\n9444.0 978.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-91.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-91.vrt Aluksne-1989-1185-91.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-91.cut.vrt Aluksne-1989-1185-91.xyz