#!/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 22.4069488 56.7259438 -gcp 21600.0 0.0 22.37306714 56.72056921 -gcp 21600.0 21975.0 22.36217737 56.74033308 -gcp 0.0 21975.0 22.39791512 56.74525772 GX4596/GX_4596_SD_frame_69.jpg GX_4596_SD_frame_69.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "13896.0 732.0\n11376.0 1002.0\n2904.0 864.0\n2808.0 2328.0\n888.0 2472.0\n960.0 19632.0\n21432.0 20112.0\n21450.0 10638.0\n21528.0 690.0" | \
  gdaltransform -tps -output_xy GX_4596_SD_frame_69.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_4596_SD_frame_69.vrt GX_4596_SD_frame_69.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_4596_SD_frame_69.cut.vrt GX_4596_SD_frame_69.xyz