#!/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 0.0 0.0 25.49486876 56.37061004 -gcp 21600.0 0.0 25.53771973 56.38565773 -gcp 21600.0 21975.0 25.56762099 56.36098901 -gcp 0.0 21975.0 25.52198052 56.34519431 GX4599/GX_4599_SD_frame_14.jpg GX_4599_SD_frame_14.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1104.0 2640.0\n888.0 19464.0\n21432.0 19872.0\n21168.0 2640.0" | \
  gdaltransform -tps -output_xy GX_4599_SD_frame_14.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_4599_SD_frame_14.vrt GX_4599_SD_frame_14.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_4599_SD_frame_14.cut.vrt GX_4599_SD_frame_14.xyz