#!/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 24.75051022 56.57665073 -gcp 21600.0 0.0 24.72565136 56.66298682 -gcp 21600.0 21849.0 24.89641613 56.68578143 -gcp 0.0 21849.0 24.92579007 56.58327872 GX2261/GX_2261_SK_frame_169.jpg GX_2261_SK_frame_169.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2388.0 2232.0\n2472.0 8064.0\n4632.0 9804.0\n4848.0 17184.0\n17196.0 16932.0\n17316.0 2232.0" | \
  gdaltransform -tps -output_xy GX_2261_SK_frame_169.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_2261_SK_frame_169.vrt GX_2261_SK_frame_169.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_2261_SK_frame_169.cut.vrt GX_2261_SK_frame_169.xyz