#!/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 1182.0 819.0 22 57.333333333333336 -gcp 22620.0 951.0 24 57.333333333333336 -gcp 22677.0 14202.0 24 56.666666666666664 -gcp 876.0 14067.0 22 56.666666666666664 lnb/24635487.jpg 24635487.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1182.0 819.0\n11839.5 961.5425236242356\n22620.0 951.0\n22677.0 14202.0\n11745.0 14223.048360200111\n876.0 14067.0" | \
  gdaltransform -tps -output_xy 24635487.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  24635487.vrt 24635487.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 24635487.cut.vrt 24635487.xyz