#!/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 423.0 378.0 24 57.5 -gcp 16350.0 378.0 24.75 57.5 -gcp 16467.0 19821.0 24.75 57 -gcp 354.0 19860.0 24 57 lnb/24837140.jpg 24837140.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "423.0 378.0\n16350.0 378.0\n16467.0 19821.0\n354.0 19860.0" | \
  gdaltransform -tps -output_xy 24837140.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  24837140.vrt 24837140.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 24837140.cut.vrt 24837140.xyz