#!/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 26.960104430359 57.495300816055 -gcp 10506.0 0.0 26.958692231953 57.468883866009 -gcp 10506.0 10542.0 26.908789960792 57.469592260715 -gcp 0.0 10542.0 26.910513295444 57.496118794415 Aluksne-1989-1186/Aluksne-1989-1186-51.jpg Aluksne-1989-1186-51.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1002.0 1029.0\n9480.0 936.0\n9528.0 9363.0\n1059.0 9441.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-51.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-51.vrt Aluksne-1989-1186-51.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-51.cut.vrt Aluksne-1989-1186-51.xyz