#!/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 24.6009376 57.18487597 -gcp 21600.0 0.0 24.61310569 57.09762747 -gcp 21600.0 23280.0 24.44092391 57.08857936 -gcp 0.0 23280.0 24.42525598 57.1778644 GX10514/GX_10514_SK_frame_424.jpg GX_10514_SK_frame_424.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "720.0 2892.0\n744.0 19824.0\n20880.0 20088.0\n21204.0 2808.0" | \
  gdaltransform -tps -output_xy GX_10514_SK_frame_424.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10514_SK_frame_424.vrt GX_10514_SK_frame_424.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10514_SK_frame_424.cut.vrt GX_10514_SK_frame_424.xyz