#!/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 25.87277827 57.25879485 -gcp 21600.0 0.0 25.8780748 57.34286136 -gcp 21600.0 23403.0 26.04812568 57.33905804 -gcp 0.0 23403.0 26.04201333 57.25559247 GX8464/GX_8464_SK_frame_266.jpg GX_8464_SK_frame_266.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "648.0 3024.0\n672.0 20136.0\n21048.0 19800.0\n21216.0 2184.0" | \
  gdaltransform -tps -output_xy GX_8464_SK_frame_266.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_8464_SK_frame_266.vrt GX_8464_SK_frame_266.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_8464_SK_frame_266.cut.vrt GX_8464_SK_frame_266.xyz