#!/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 24.73320086 56.76493453 -gcp 21600.0 0.0 24.74152161 56.85013586 -gcp 21600.0 23340.0 24.9100166 56.84548513 -gcp 0.0 23340.0 24.90256551 56.76016431 GX10673/GX_10673_SK_frame_992.jpg GX_10673_SK_frame_992.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1128.0 3120.0\n912.0 19824.0\n19992.0 20256.0\n20256.0 2856.0" | \
  gdaltransform -tps -output_xy GX_10673_SK_frame_992.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10673_SK_frame_992.vrt GX_10673_SK_frame_992.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10673_SK_frame_992.cut.vrt GX_10673_SK_frame_992.xyz