#!/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 26.678194999694828 57.46560620825373 -gcp 10539.0 0.0 26.676971912384037 57.43870220181609 -gcp 10539.0 10653.0 26.627844572067264 57.439008237204 -gcp 0.0 10653.0 26.62806987762451 57.46573891870549 Aluksne-1989-1186/Aluksne-1989-1186-184.jpg Aluksne-1989-1186-184.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1050.0 1089.0\n9471.0 1023.0\n9507.0 9540.0\n1086.0 9597.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-184.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-184.vrt Aluksne-1989-1186-184.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-184.cut.vrt Aluksne-1989-1186-184.xyz