#!/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 5016.0 3858.0 22.337216666666666 56.5 -gcp 26562.0 3753.0 22.837216666666666 56.5 -gcp 26796.0 23310.0 22.837216666666666 56.25 -gcp 5118.0 23469.0 22.337216666666666 56.25 nr/KdwR-LC_L16_Laischew.jpg KdwR-LC_L16_Laischew.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "5016.0 3858.0\n26562.0 3753.0\n26796.0 23310.0\n5118.0 23469.0" | \
  gdaltransform -tps -output_xy KdwR-LC_L16_Laischew.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  KdwR-LC_L16_Laischew.vrt KdwR-LC_L16_Laischew.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES KdwR-LC_L16_Laischew.cut.vrt KdwR-LC_L16_Laischew.xyz