#!/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 1446.0 525.0 25.337216666666666 58 -gcp 8373.0 522.0 25.837216666666666 58 -gcp 8388.0 7110.0 25.837216666666666 57.75 -gcp 1419.0 7119.0 25.337216666666666 57.75 lnb/src5/raw/27342341.jpg 27342341.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1446.0 525.0\n8373.0 522.0\n8388.0 7110.0\n1419.0 7119.0" | \
  gdaltransform -tps -output_xy 27342341.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  27342341.vrt 27342341.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 27342341.cut.vrt 27342341.xyz