#!/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 26.89739306545258 57.55439224241841 -gcp 10485.0 0.0 26.897360878944397 57.52913748413491 -gcp 10485.0 13260.0 26.83711500486645 57.52906544963455 -gcp 0.0 13260.0 26.836986926272004 57.55470679264916 Aluksne-1989-1185/Aluksne-1989-1185-5.jpg Aluksne-1989-1185-5.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "984.0 1035.0\n9477.0 1032.0\n9471.0 9450.0\n981.0 9456.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-5.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-5.vrt Aluksne-1989-1185-5.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-5.cut.vrt Aluksne-1989-1185-5.xyz