#!/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 966.0 510.0 23.337216666666666 56.25 -gcp 8334.0 531.0 23.837216666666666 56.25 -gcp 8328.0 7086.0 23.837216666666666 56 -gcp 918.0 7062.0 23.337216666666666 56 lnb/src3/raw/27342237.jpg 27342237.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "966.0 510.0\n8334.0 531.0\n8328.0 7086.0\n918.0 7062.0" | \
  gdaltransform -tps -output_xy 27342237.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  27342237.vrt 27342237.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 27342237.cut.vrt 27342237.xyz