#!/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 1401.0 588.0 24.337216666666666 58 -gcp 8334.0 570.0 24.837216666666666 58 -gcp 8364.0 7155.0 24.837216666666666 57.75 -gcp 1383.0 7173.0 24.337216666666666 57.75 lnb/src5/raw/27342337.jpg 27342337.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1401.0 588.0\n8334.0 570.0\n8364.0 7155.0\n1383.0 7173.0" | \
  gdaltransform -tps -output_xy 27342337.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  27342337.vrt 27342337.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 27342337.cut.vrt 27342337.xyz