#!/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 24.13548838 56.96734754 -gcp 21600.0 0.0 24.08490425 56.96346083 -gcp 21600.0 21729.0 24.0765499 56.9910362 -gcp 0.0 21729.0 24.12817597 56.99566946 GX2200/GX_2200_SD_frame_80.jpg GX_2200_SD_frame_80.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "840.0 2952.173429683157\n840.0 19367.893274041133\n21408.0 19247.799888827125\n21072.0 3071.919955530851" | \
  gdaltransform -tps -output_xy GX_2200_SD_frame_80.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_2200_SD_frame_80.vrt GX_2200_SD_frame_80.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_2200_SD_frame_80.cut.vrt GX_2200_SD_frame_80.xyz