#!/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 25.66443801 56.69765488 -gcp 14934.0 0.0 25.67148149 56.61048645 -gcp 14934.0 14211.0 25.52028 56.60517486 -gcp 0.0 14211.0 25.50914884 56.69404672 GX10511/GX_10511_SK_frame_51.jpg GX_10511_SK_frame_51.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1020.0 1344.0\n14580.0 996.0\n14640.0 12660.0\n1044.0 12588.0" | \
  gdaltransform -tps -output_xy GX_10511_SK_frame_51.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10511_SK_frame_51.vrt GX_10511_SK_frame_51.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10511_SK_frame_51.cut.vrt GX_10511_SK_frame_51.xyz