#!/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 24.99041008 57.18681006 -gcp 12009.0 0.0 24.99311951 57.20690016 -gcp 12009.0 12495.0 25.02870083 57.20672805 -gcp 0.0 12495.0 25.03052133 57.18700053 GX18586/GX_18586_SK_frame_48.jpg GX_18586_SK_frame_48.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1152.0 1185.0\n1176.0 2142.0\n264.0 2184.0\n276.0 11490.0\n1500.0 11988.0\n11562.0 11880.0\n11640.0 1224.0" | \
  gdaltransform -tps -output_xy GX_18586_SK_frame_48.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_18586_SK_frame_48.vrt GX_18586_SK_frame_48.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_18586_SK_frame_48.cut.vrt GX_18586_SK_frame_48.xyz