#!/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 24.22813392 56.95263006 -gcp 21600.0 0.0 24.18595482 56.97300074 -gcp 21600.0 21168.0 24.22288694 56.99676081 -gcp 0.0 21168.0 24.26687986 56.97541634 GX4190/GX_4190_SD_frame_7.jpg GX_4190_SD_frame_7.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "600.0 2376.2801556420236\n696.0 18936.120066703726\n20904.0 19152.0\n21120.0 2399.8399110617006" | \
  gdaltransform -tps -output_xy GX_4190_SD_frame_7.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_4190_SD_frame_7.vrt GX_4190_SD_frame_7.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_4190_SD_frame_7.cut.vrt GX_4190_SD_frame_7.xyz