#!/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 26.95952653884888 57.668222162748286 -gcp 10485.0 0.0 26.95858240127564 57.641576548365286 -gcp 10485.0 13266.0 26.896011829376224 57.64223115587781 -gcp 0.0 13266.0 26.896677017211918 57.66910580515505 Aluksne-1989-1185/Aluksne-1989-1185-55.jpg Aluksne-1989-1185-55.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "987.0 996.0\n9423.0 951.0\n9453.0 9483.0\n1005.5625 9527.25" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-55.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-55.vrt Aluksne-1989-1185-55.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-55.cut.vrt Aluksne-1989-1185-55.xyz