#!/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 26.83856412 56.7772115 -gcp 22656.0 0.0 26.84643908 56.86474466 -gcp 22656.0 21573.0 27.00195388 56.86066165 -gcp 0.0 21573.0 26.99204044 56.77270972 GX10673/GX_10673_SK_frame_956.jpg GX_10673_SK_frame_956.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "984.0 2064.0\n20688.0 1752.0\n21072.0 19200.0\n744.0 19032.0" | \
  gdaltransform -tps -output_xy GX_10673_SK_frame_956.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10673_SK_frame_956.vrt GX_10673_SK_frame_956.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10673_SK_frame_956.cut.vrt GX_10673_SK_frame_956.xyz