#!/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 24.10470587 56.77019309 -gcp 21600.0 0.0 24.10340518 56.85552491 -gcp 21600.0 23775.0 24.27611851 56.85738353 -gcp 0.0 23775.0 24.27949583 56.77104182 GX10673/GX_10673_SK_frame_003.jpg GX_10673_SK_frame_003.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "600.0 3756.0\n306.0 20877.0\n20304.0 21168.0\n20412.0 3594.0" | \
  gdaltransform -tps -output_xy GX_10673_SK_frame_003.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10673_SK_frame_003.vrt GX_10673_SK_frame_003.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10673_SK_frame_003.cut.vrt GX_10673_SK_frame_003.xyz