#!/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 24.32531152 56.86501186 -gcp 21600.0 0.0 24.28794785 56.95027996 -gcp 21600.0 22470.0 24.46188406 56.98058422 -gcp 0.0 22470.0 24.50424493 56.87949846 GX2261/GX_2261_SK_frame_10.jpg GX_2261_SK_frame_10.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2472.0 1512.0\n2256.0 20640.0\n16944.0 20472.0\n17112.0 1416.0" | \
  gdaltransform -tps -output_xy GX_2261_SK_frame_10.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_2261_SK_frame_10.vrt GX_2261_SK_frame_10.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_2261_SK_frame_10.cut.vrt GX_2261_SK_frame_10.xyz