#!/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 26.89512391662598 57.596386959493856 -gcp 10485.0 0.0 26.894329982757572 57.57131407472678 -gcp 10485.0 13266.0 26.83555439289473 57.57086417986768 -gcp 0.0 13266.0 26.833006141384597 57.59668204982487 Aluksne-1989-1185/Aluksne-1989-1185-9.jpg Aluksne-1989-1185-9.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1005.0 1050.0\n9489.0 1023.0\n9519.0 9447.0\n999.0 9465.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-9.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-9.vrt Aluksne-1989-1185-9.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-9.cut.vrt Aluksne-1989-1185-9.xyz