#!/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 24.27442046 56.98066636 -gcp 21600.0 0.0 24.2430746 57.00658061 -gcp 21600.0 21168.0 24.29057921 57.02444466 -gcp 0.0 21168.0 24.32252693 56.99724321 GX4190/GX_4190_SD_frame_11.jpg GX_4190_SD_frame_11.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "624.0 2184.1867704280157\n624.0 19008.24013340745\n20928.0 18935.639799888828\n20976.0 2039.933296275709" | \
  gdaltransform -tps -output_xy GX_4190_SD_frame_11.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_4190_SD_frame_11.vrt GX_4190_SD_frame_11.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_4190_SD_frame_11.cut.vrt GX_4190_SD_frame_11.xyz