#!/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 27.41350651 56.78019411 -gcp 21600.0 0.0 27.40951538 56.86363671 -gcp 21600.0 23775.0 27.57787228 56.86574796 -gcp 0.0 23775.0 27.58205652 56.78200436 GX10673/GX_10673_SK_frame_945.jpg GX_10673_SK_frame_945.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "864.0 3816.0\n792.0 20712.0\n20496.0 20760.0\n20328.0 3552.0" | \
  gdaltransform -tps -output_xy GX_10673_SK_frame_945.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10673_SK_frame_945.vrt GX_10673_SK_frame_945.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10673_SK_frame_945.cut.vrt GX_10673_SK_frame_945.xyz