#!/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 159.0 594.0 22.337216666666666 57.75 -gcp 7011.0 597.0 22.837216666666666 57.75 -gcp 7032.0 7002.0 22.837216666666666 57.5 -gcp 108.0 7008.0 22.337216666666666 57.5 lnb/src5/raw/27342336.jpg 27342336.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "159.0 594.0\n7011.0 597.0\n7032.0 7002.0\n108.0 7008.0" | \
  gdaltransform -tps -output_xy 27342336.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  27342336.vrt 27342336.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 27342336.cut.vrt 27342336.xyz