#!/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 26.09834433 55.93093313 -gcp 14247.0 0.0 26.07984781 55.95738701 -gcp 14247.0 14298.0 26.12777352 55.96935532 -gcp 0.0 14298.0 26.14981592 55.94126328 GX4599/GX_4599_SD_frame_42.jpg GX_4599_SD_frame_42.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "408.0 1443.0\n13944.0 1535.6791086350975\n14016.0 12887.879665738163\n504.0 12816.34763231198" | \
  gdaltransform -tps -output_xy GX_4599_SD_frame_42.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_4599_SD_frame_42.vrt GX_4599_SD_frame_42.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_4599_SD_frame_42.cut.vrt GX_4599_SD_frame_42.xyz