#!/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 26.01488333 56.69673333 -gcp 21600.0 0.0 26.04221667 56.61456667 -gcp 21600.0 21849.0 25.88711667 56.59936667 -gcp 0.0 21849.0 25.86276667 56.68378333 GX10511/GX_10511_SK_frame_58.jpg GX_10511_SK_frame_58.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1320.0 2400.0\n1344.0 19224.0\n20976.0 19416.0\n21000.0 2016.0" | \
  gdaltransform -tps -output_xy GX_10511_SK_frame_58.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10511_SK_frame_58.vrt GX_10511_SK_frame_58.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10511_SK_frame_58.cut.vrt GX_10511_SK_frame_58.xyz