#!/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 1449.0 1770.0 24 56.5 -gcp 17805.0 1779.0 24.75 56.5 -gcp 17817.0 21483.0 24.75 56 -gcp 1245.0 21504.0 24 56 lnb/24837141.jpg 24837141.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1449.0 1770.0\n17805.0 1779.0\n17817.0 21483.0\n1245.0 21504.0" | \
  gdaltransform -tps -output_xy 24837141.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  24837141.vrt 24837141.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 24837141.cut.vrt 24837141.xyz