#!/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 26.9492054 56.77803099 -gcp 21600.0 0.0 26.95883989 56.86170129 -gcp 21600.0 23775.0 27.12846279 56.85535478 -gcp 0.0 23775.0 27.11884975 56.77229347 GX10673/GX_10673_SK_frame_954.jpg GX_10673_SK_frame_954.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "756.0 3672.0\n780.0 20580.0\n20784.0 20544.0\n20736.0 3648.0" | \
  gdaltransform -tps -output_xy GX_10673_SK_frame_954.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10673_SK_frame_954.vrt GX_10673_SK_frame_954.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10673_SK_frame_954.cut.vrt GX_10673_SK_frame_954.xyz