#!/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 1275.0 648.0 21.837216666666666 57.5 -gcp 8313.0 639.0 22.337216666666666 57.5 -gcp 8355.0 7167.0 22.337216666666666 57.25 -gcp 1260.0 7191.0 21.837216666666666 57.25 lnb/src1/raw/27342284.jpg 27342284.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1275.0 648.0\n8313.0 639.0\n8355.0 7167.0\n1260.0 7191.0" | \
  gdaltransform -tps -output_xy 27342284.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  27342284.vrt 27342284.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 27342284.cut.vrt 27342284.xyz