#!/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 22.41153005 57.77096872 -gcp 10980.0 0.0 22.62800614 57.74183167 -gcp 10980.0 11154.0 22.5636689 57.632349 -gcp 0.0 11154.0 22.37318878 57.65819975 GX13126/GX_13126_SG_frame_78.jpg GX_13126_SG_frame_78.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "744.0 1175.9732590529247\n10296.0 1271.8128133704731\n10440.0 9767.94651810585\n768.0 10152.0" | \
  gdaltransform -tps -output_xy GX_13126_SG_frame_78.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_13126_SG_frame_78.vrt GX_13126_SG_frame_78.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_13126_SG_frame_78.cut.vrt GX_13126_SG_frame_78.xyz