#!/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 24.07599977 57.04093762 -gcp 21600.0 0.0 24.03311869 57.02538524 -gcp 21600.0 21729.0 24.00347997 57.04870769 -gcp 0.0 21729.0 24.04720476 57.06541642 GX2200/GX_2200_SD_frame_86.jpg GX_2200_SD_frame_86.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "816.0 3263.866592551417\n912.0 19296.106725958867\n21216.0 19247.733185102836\n21024.0 3167.9466370205673" | \
  gdaltransform -tps -output_xy GX_2200_SD_frame_86.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_2200_SD_frame_86.vrt GX_2200_SD_frame_86.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_2200_SD_frame_86.cut.vrt GX_2200_SD_frame_86.xyz