#!/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 3419.6045155189786 5199.899080372393 26.92448616 56.79030247 -gcp 17336.61469116403 6027.762170369908 26.9372642 56.84407266 -gcp 18077.64676038504 20655.11401182371 27.04219222 56.84254113 -gcp 2380.048740229846 20229.18766719521 27.03069091 56.78209842 GX10673/GX_10673_SK_frame_955_copy.jpg GX_10673_SK_frame_955_copy.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "720.0 4233.0\n20604.0 3911.98766066838\n20496.0 20977.159897172238\n672.0 20880.666323907455" | \
  gdaltransform -tps -output_xy GX_10673_SK_frame_955_copy.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10673_SK_frame_955_copy.vrt GX_10673_SK_frame_955_copy.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10673_SK_frame_955_copy.cut.vrt GX_10673_SK_frame_955_copy.xyz