#!/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 24.46985722 56.53618049 -gcp 22935.0 0.0 24.4539283 56.62744566 -gcp 22935.0 20997.0 24.60686445 56.63672524 -gcp 0.0 20997.0 24.62422371 56.54420177 GX10518/GX_10518B_SK_frame_917.jpg GX_10518B_SK_frame_917.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2340.0 1452.0\n1764.0 18288.0\n21960.0 18840.0\n22416.0 1476.0" | \
  gdaltransform -tps -output_xy GX_10518B_SK_frame_917.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10518B_SK_frame_917.vrt GX_10518B_SK_frame_917.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10518B_SK_frame_917.cut.vrt GX_10518B_SK_frame_917.xyz