#!/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 23.86324883 56.75811051 -gcp 21600.0 0.0 23.85290623 56.84267025 -gcp 21600.0 23775.0 24.02628422 56.84991069 -gcp 0.0 23775.0 24.03744221 56.76370907 GX10673/GX_10673_SK_frame_007.jpg GX_10673_SK_frame_007.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1194.0 3438.0\n918.0 20580.0\n20808.0 21024.0\n20964.0 3366.0" | \
  gdaltransform -tps -output_xy GX_10673_SK_frame_007.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10673_SK_frame_007.vrt GX_10673_SK_frame_007.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10673_SK_frame_007.cut.vrt GX_10673_SK_frame_007.xyz