#!/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 26.771961315155032 57.400097903049065 -gcp 10518.0 0.0 26.77151070404053 57.373330867606946 -gcp 10518.0 10608.0 26.722498075485234 57.37359982071788 -gcp 0.0 10608.0 26.722267405509953 57.400031421500536 Aluksne-1989-1186/Aluksne-1989-1186-147.jpg Aluksne-1989-1186-147.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1083.0 1011.0\n9468.0 1038.0\n9381.0 9531.0\n963.0 9432.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-147.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-147.vrt Aluksne-1989-1186-147.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-147.cut.vrt Aluksne-1989-1186-147.xyz