#!/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 1941.0 1410.0 24.337216666666666 56.5 -gcp 12996.0 1329.0 25.337216666666666 56.5 -gcp 13140.0 11298.0 25.337216666666666 56 -gcp 1923.0 11406.0 24.337216666666666 56 lnb/27352327.jpg 27352327.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1941.0 1410.0\n12996.0 1329.0\n13140.0 11298.0\n1923.0 11406.0" | \
  gdaltransform -tps -output_xy 27352327.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  27352327.vrt 27352327.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 27352327.cut.vrt 27352327.xyz