#!/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 26.22800158 57.25803011 -gcp 21600.0 0.0 26.22647574 57.34262395 -gcp 21600.0 23403.0 26.39734839 57.34327375 -gcp 0.0 23403.0 26.39888596 57.25911999 GX8464/GX_8464_SK_frame_260.jpg GX_8464_SK_frame_260.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "600.0 2196.0\n396.0 19248.0\n21024.0 19680.0\n21204.0 2280.0" | \
  gdaltransform -tps -output_xy GX_8464_SK_frame_260.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_8464_SK_frame_260.vrt GX_8464_SK_frame_260.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_8464_SK_frame_260.cut.vrt GX_8464_SK_frame_260.xyz