#!/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 1953.0 1326.0 25.337216666666666 56 -gcp 13152.0 1332.0 26.337216666666666 56 -gcp 13224.0 11277.0 26.337216666666666 55.5 -gcp 1845.0 11310.0 25.337216666666666 55.5 lnb/27352336.jpg 27352336.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1953.0 1326.0\n13152.0 1332.0\n13224.0 11277.0\n1845.0 11310.0" | \
  gdaltransform -tps -output_xy 27352336.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  27352336.vrt 27352336.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 27352336.cut.vrt 27352336.xyz