#!/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 24.1799062 56.71094274 -gcp 21600.0 0.0 24.157734 56.79796176 -gcp 21600.0 21789.0 24.32687322 56.81959367 -gcp 0.0 21789.0 24.35743459 56.71677805 GX2261/GX_2261_SK_frame_89.jpg GX_2261_SK_frame_89.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2208.0 2328.0\n2280.0 19728.0\n17376.0 19776.0\n17232.0 2232.0" | \
  gdaltransform -tps -output_xy GX_2261_SK_frame_89.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_2261_SK_frame_89.vrt GX_2261_SK_frame_89.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_2261_SK_frame_89.cut.vrt GX_2261_SK_frame_89.xyz