#!/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 26.31809457 57.1535143 -gcp 21537.0 0.0 26.32571625 57.23671961 -gcp 21537.0 23466.0 26.49844557 57.23123466 -gcp 0.0 23466.0 26.4867296 57.1465345 GX10802/GX_10802_SK_frame_375.jpg GX_10802_SK_frame_375.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "936.0 2448.0\n960.0 19128.0\n20592.0 19104.0\n20688.0 1920.0" | \
  gdaltransform -tps -output_xy GX_10802_SK_frame_375.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10802_SK_frame_375.vrt GX_10802_SK_frame_375.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10802_SK_frame_375.cut.vrt GX_10802_SK_frame_375.xyz