#!/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 1167.0 399.0 25.337216666666666 57 -gcp 8313.0 405.0 25.837216666666666 57 -gcp 8334.0 6954.0 25.837216666666666 56.75 -gcp 1137.0 6942.0 25.337216666666666 56.75 lnb/src3/raw/27342256.jpg 27342256.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1167.0 399.0\n8313.0 405.0\n8334.0 6954.0\n1137.0 6942.0" | \
  gdaltransform -tps -output_xy 27342256.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  27342256.vrt 27342256.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 27342256.cut.vrt 27342256.xyz