#!/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 1062.0 630.0 22.837216666666666 57.25 -gcp 8187.0 681.0 23.337216666666666 57.25 -gcp 8169.0 7233.0 23.337216666666666 57 -gcp 990.0 7191.0 22.837216666666666 57 lnb/src3/raw/27342234.jpg 27342234.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1062.0 630.0\n8187.0 681.0\n8169.0 7233.0\n990.0 7191.0" | \
  gdaltransform -tps -output_xy 27342234.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  27342234.vrt 27342234.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 27342234.cut.vrt 27342234.xyz