#!/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 1956.0 1020.0 21.837216666666666 57 -gcp 12672.0 1026.0 22.337216666666666 57 -gcp 12714.0 10782.0 22.337216666666666 56.75 -gcp 1914.0 10764.0 21.837216666666666 56.75 lnb/src1/raw/27342287.jpg 27342287.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1956.0 1020.0\n12672.0 1026.0\n12714.0 10782.0\n1914.0 10764.0" | \
  gdaltransform -tps -output_xy 27342287.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  27342287.vrt 27342287.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 27342287.cut.vrt 27342287.xyz