#!/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 26.959869861603 57.679323507924 -gcp 10485.0 0.0 26.959011554718 57.652729102906 -gcp 10485.0 13260.0 26.896221382281524 57.65329478499013 -gcp 0.0 13260.0 26.897803544998172 57.67994301774037 Aluksne-1989-1185/Aluksne-1989-1185-54.jpg Aluksne-1989-1185-54.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1023.0 1029.0\n9462.0 1017.0\n9456.0 9528.0\n1016.625 9541.125" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-54.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-54.vrt Aluksne-1989-1185-54.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-54.cut.vrt Aluksne-1989-1185-54.xyz