#!/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 24.22286457 56.56711038 -gcp 21600.0 0.0 24.20361221 56.65452419 -gcp 21600.0 21975.0 24.36769386 56.67663639 -gcp 0.0 21975.0 24.40948652 56.57422473 GX2261/GX_2261_SK_frame_164.jpg GX_2261_SK_frame_164.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1800.0 2304.0\n1872.0 19344.0\n17064.0 19512.0\n17064.0 2256.0" | \
  gdaltransform -tps -output_xy GX_2261_SK_frame_164.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_2261_SK_frame_164.vrt GX_2261_SK_frame_164.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_2261_SK_frame_164.cut.vrt GX_2261_SK_frame_164.xyz