#!/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 26.831791758353102 57.6289076120866 -gcp 10485.0 0.0 26.83203844348395 57.602980876157964 -gcp 10485.0 13344.0 26.76966636621016 57.6022993681615 -gcp 0.0 13344.0 26.769489561912657 57.629295063481614 Aluksne-1989-1185/Aluksne-1989-1185-108.jpg Aluksne-1989-1185-108.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1041.0 975.0\n978.0 9465.0\n9414.0 9543.0\n9483.0 1011.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-108.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-108.vrt Aluksne-1989-1185-108.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-108.cut.vrt Aluksne-1989-1185-108.xyz