#!/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 1359.0 876.0 25.837216666666666 55.75 -gcp 12462.0 837.0 26.337216666666666 55.75 -gcp 12534.0 10590.0 26.337216666666666 55.5 -gcp 1350.0 10614.0 25.837216666666666 55.5 lnb/src2/raw/27342216.jpg 27342216.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1359.0 876.0\n12462.0 837.0\n12534.0 10590.0\n1350.0 10614.0" | \
  gdaltransform -tps -output_xy 27342216.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  27342216.vrt 27342216.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 27342216.cut.vrt 27342216.xyz