#!/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 24.31419765 57.18277796 -gcp 21600.0 0.0 24.31763796 57.09659507 -gcp 21600.0 23280.0 24.14107937 57.09307516 -gcp 0.0 23280.0 24.1335011 57.18417609 GX10514/GX_10514_SK_frame_418.jpg GX_10514_SK_frame_418.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "384.0 2472.0\n480.0 19440.0\n20880.0 19800.0\n21048.0 2328.0" | \
  gdaltransform -tps -output_xy GX_10514_SK_frame_418.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10514_SK_frame_418.vrt GX_10514_SK_frame_418.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10514_SK_frame_418.cut.vrt GX_10514_SK_frame_418.xyz