#!/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 747.0 1770.0 22.676666666666666 56.75 -gcp 26289.0 1854.0 23.126666666666665 56.75 -gcp 26337.0 27477.0 23.126666666666665 56.5 -gcp 555.0 27465.0 22.676666666666666 56.5 V-13_Neuenburg.jpg V-13_Neuenburg.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "747.0 1770.0\n26289.0 1854.0\n26337.0 27477.0\n555.0 27465.0" | \
  gdaltransform -tps -output_xy V-13_Neuenburg.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  V-13_Neuenburg.vrt V-13_Neuenburg.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES V-13_Neuenburg.cut.vrt V-13_Neuenburg.xyz