#!/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 22.8335166 56.67490405 -gcp 11127.0 0.0 23.00436258 56.68900032 -gcp 11127.0 10866.0 23.04756761 56.59667651 -gcp 0.0 10866.0 22.85645485 56.5691778 GX2685/GX_2685A_SK_frame_98.jpg GX_2685A_SK_frame_98.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "576.0 432.01337047353763\n10704.0 336.05348189415054\n10752.0 9599.839554317548\n504.0 9705.0" | \
  gdaltransform -tps -output_xy GX_2685A_SK_frame_98.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_2685A_SK_frame_98.vrt GX_2685A_SK_frame_98.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_2685A_SK_frame_98.cut.vrt GX_2685A_SK_frame_98.xyz