#!/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 27.32634013 57.25346127 -gcp 21600.0 0.0 27.35650006 57.33415211 -gcp 21600.0 23403.0 27.51893391 57.32005691 -gcp 0.0 23403.0 27.4973922 57.23598031 GX8464/GX_8464_SK_frame_240.jpg GX_8464_SK_frame_240.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "528.0204255319145 2232.0\n455.9727659574464 19104.0\n20976.02723404255 19224.0\n21120.013617021275 1896.0" | \
  gdaltransform -tps -output_xy GX_8464_SK_frame_240.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_8464_SK_frame_240.vrt GX_8464_SK_frame_240.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_8464_SK_frame_240.cut.vrt GX_8464_SK_frame_240.xyz