#!/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 22.53798008 57.59941566 -gcp 10980.0 0.0 22.34885216 57.62382874 -gcp 10980.0 11496.0 22.38962173 57.7411362 -gcp 0.0 11496.0 22.60342598 57.71054394 GX13126/GX_13126_SK_frame_76.jpg GX_13126_SK_frame_76.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "360.0 1659.0\n10104.0 1247.7593314763226\n10152.0 9983.866295264623\n552.0 10104.093593314763" | \
  gdaltransform -tps -output_xy GX_13126_SK_frame_76.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_13126_SK_frame_76.vrt GX_13126_SK_frame_76.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_13126_SK_frame_76.cut.vrt GX_13126_SK_frame_76.xyz