#!/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 4269.0 1785.0 20.837216666666666 56.25 -gcp 26256.0 2007.0 21.337216666666666 56.25 -gcp 26163.0 21759.0 21.337216666666666 56 -gcp 4041.0 21522.0 20.837216666666666 56 nr/KdwR-LC_H17_Dorbiany.jpg KdwR-LC_H17_Dorbiany.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4269.0 1785.0\n26256.0 2007.0\n26163.0 21759.0\n4041.0 21522.0" | \
  gdaltransform -tps -output_xy KdwR-LC_H17_Dorbiany.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  KdwR-LC_H17_Dorbiany.vrt KdwR-LC_H17_Dorbiany.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES KdwR-LC_H17_Dorbiany.cut.vrt KdwR-LC_H17_Dorbiany.xyz