#!/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 24.22393228 56.79561691 -gcp 15582.0 0.0 24.23791639 56.71193213 -gcp 15582.0 15582.0 24.08795283 56.70394033 -gcp 0.0 15582.0 24.07018011 56.78602396 GX10863/GX_10863_SK_frame_871.jpg GX_10863_SK_frame_871.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1224.0 1560.0\n1056.0 13728.0\n14592.0 13632.0\n14688.0 1440.0" | \
  gdaltransform -tps -output_xy GX_10863_SK_frame_871.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10863_SK_frame_871.vrt GX_10863_SK_frame_871.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10863_SK_frame_871.cut.vrt GX_10863_SK_frame_871.xyz