#!/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 1605.0 2679.0 22.5 57.5 -gcp 22854.0 2637.0 23.5 57.5 -gcp 22953.0 22848.0 23.5 57 -gcp 1452.0 22830.0 22.5 57 lnb/24837139.jpg 24837139.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1605.0 2679.0\n22854.0 2637.0\n22953.0 22848.0\n1452.0 22830.0" | \
  gdaltransform -tps -output_xy 24837139.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  24837139.vrt 24837139.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 24837139.cut.vrt 24837139.xyz