#!/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 24.22416687 56.97838572 -gcp 21414.0 0.0 24.26600933 57.07419547 -gcp 21414.0 21789.0 24.4372201 57.04909907 -gcp 0.0 21789.0 24.39939022 56.9588759 GX2206/GX_2206_SK_frame_51.jpg GX_2206_SK_frame_51.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "444.0 3312.0\n396.0 10254.0\n708.0 10479.0\n720.0 11913.0\n408.0 12177.0\n378.0 18717.0\n21147.0 19113.0\n21144.0 3024.0" | \
  gdaltransform -tps -output_xy GX_2206_SK_frame_51.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_2206_SK_frame_51.vrt GX_2206_SK_frame_51.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_2206_SK_frame_51.cut.vrt GX_2206_SK_frame_51.xyz