#!/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 27.06932545 56.77725507 -gcp 21600.0 0.0 27.08168507 56.86138458 -gcp 21600.0 23775.0 27.25017071 56.85404076 -gcp 0.0 23775.0 27.23922729 56.7706473 GX10673/GX_10673_SK_frame_952.jpg GX_10673_SK_frame_952.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "624.0 4152.0\n696.0 21048.0\n20400.0 20928.0\n20256.0 3648.0" | \
  gdaltransform -tps -output_xy GX_10673_SK_frame_952.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10673_SK_frame_952.vrt GX_10673_SK_frame_952.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10673_SK_frame_952.cut.vrt GX_10673_SK_frame_952.xyz