#!/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 4815.0 2271.0 23.837216666666666 57.25 -gcp 26208.0 2238.0 24.337216666666666 57.25 -gcp 26367.0 21945.0 24.337216666666666 57 -gcp 4809.0 22020.0 23.837216666666666 57 nr/KdwR-LC_O13_Dunamunde.jpg KdwR-LC_O13_Dunamunde.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4815.0 2271.0\n26208.0 2238.0\n26367.0 21945.0\n4809.0 22020.0" | \
  gdaltransform -tps -output_xy KdwR-LC_O13_Dunamunde.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  KdwR-LC_O13_Dunamunde.vrt KdwR-LC_O13_Dunamunde.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES KdwR-LC_O13_Dunamunde.cut.vrt KdwR-LC_O13_Dunamunde.xyz