#!/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 25.27562493 57.30935815 -gcp 12009.0 0.0 25.26985432 57.33015868 -gcp 12009.0 12495.0 25.31147879 57.33183764 -gcp 0.0 12495.0 25.31236597 57.31096728 GX18586/GX_18586_SK_frame_28.jpg GX_18586_SK_frame_28.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1320.0 1032.0\n1278.0 1776.0\n348.0 1776.0\n132.0 9672.0\n11340.0 9600.0\n11496.0 1218.0" | \
  gdaltransform -tps -output_xy GX_18586_SK_frame_28.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_18586_SK_frame_28.vrt GX_18586_SK_frame_28.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_18586_SK_frame_28.cut.vrt GX_18586_SK_frame_28.xyz