#!/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 25.93921865 57.25787903 -gcp 21600.0 0.0 25.94013911 57.34167695 -gcp 21600.0 23403.0 26.1100068 57.34099279 -gcp 0.0 23403.0 26.10905374 57.2572468 GX8464/GX_8464_SK_frame_265.jpg GX_8464_SK_frame_265.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "720.0 2208.0\n528.0 19128.0\n21240.0 19608.0\n21288.0 1608.0" | \
  gdaltransform -tps -output_xy GX_8464_SK_frame_265.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_8464_SK_frame_265.vrt GX_8464_SK_frame_265.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_8464_SK_frame_265.cut.vrt GX_8464_SK_frame_265.xyz