#!/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 24.92863396 56.762922 -gcp 21600.0 0.0 24.93425346 56.84731372 -gcp 21600.0 23340.0 25.10151364 56.84485539 -gcp 0.0 23340.0 25.09908871 56.75993916 GX10673/GX_10673_SK_frame_988.jpg GX_10673_SK_frame_988.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "888.0 3000.0\n576.0 19632.0\n20088.0 20208.0\n20400.0 2808.0" | \
  gdaltransform -tps -output_xy GX_10673_SK_frame_988.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10673_SK_frame_988.vrt GX_10673_SK_frame_988.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10673_SK_frame_988.cut.vrt GX_10673_SK_frame_988.xyz