#!/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 660.0 621.0 25.837216666666666 52.25 -gcp 8682.0 567.0 26.337216666666666 52.25 -gcp 8736.0 7134.0 26.337216666666666 52 -gcp 657.0 7197.0 25.837216666666666 52 lnb/src2/raw/27342218.jpg 27342218.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "660.0 621.0\n8682.0 567.0\n8736.0 7134.0\n657.0 7197.0" | \
  gdaltransform -tps -output_xy 27342218.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  27342218.vrt 27342218.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 27342218.cut.vrt 27342218.xyz