#!/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 1920.0 1068.0 21.337216666666666 57.5 -gcp 12480.0 1026.0 21.837216666666666 57.5 -gcp 12570.0 10770.0 21.837216666666666 57.25 -gcp 1896.0 10809.0 21.337216666666666 57.25 lnb/src1/raw/27342272.jpg 27342272.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1920.0 1068.0\n12480.0 1026.0\n12570.0 10770.0\n1896.0 10809.0" | \
  gdaltransform -tps -output_xy 27342272.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  27342272.vrt 27342272.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 27342272.cut.vrt 27342272.xyz