#!/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 24.83003205 57.18629661 -gcp 21600.0 0.0 24.84259359 57.09900271 -gcp 21600.0 23280.0 24.6709481 57.09012449 -gcp 0.0 23280.0 24.65481528 57.17881141 GX10514/GX_10514_SK_frame_428.jpg GX_10514_SK_frame_428.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "720.0 3072.0\n768.0 19896.0\n21096.0 20208.0\n21216.0 2760.0" | \
  gdaltransform -tps -output_xy GX_10514_SK_frame_428.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10514_SK_frame_428.vrt GX_10514_SK_frame_428.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10514_SK_frame_428.cut.vrt GX_10514_SK_frame_428.xyz