#!/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 2413.044821822885 4465.08379477086 22.46591315 56.6613442 -gcp 20596.491901012272 4636.77717971038 22.47314572 56.68162624 -gcp 21180.72144594405 18853.175528079897 22.49972105 56.67973433 -gcp 3423.257660122819 19459.16507204098 22.4968712 56.65941895 GX4596/GX_4596_SD_frame_47_copy.jpg GX_4596_SD_frame_47_copy.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "0.0 0.0\n21600.0 0.0\n21600.0 21912.0\n0.0 21912.0" | \
  gdaltransform -tps -output_xy GX_4596_SD_frame_47_copy.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_4596_SD_frame_47_copy.vrt GX_4596_SD_frame_47_copy.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_4596_SD_frame_47_copy.cut.vrt GX_4596_SD_frame_47_copy.xyz