#!/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 26.32213738 56.77859868 -gcp 21600.0 0.0 26.32555962 56.86199454 -gcp 21600.0 23775.0 26.49595267 56.8593147 -gcp 0.0 23775.0 26.49125576 56.77549166 GX10673/GX_10673_SK_frame_964.jpg GX_10673_SK_frame_964.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "312.0 3936.0\n384.0 20712.0\n20376.0 20712.0\n20112.0 3312.0" | \
  gdaltransform -tps -output_xy GX_10673_SK_frame_964.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10673_SK_frame_964.vrt GX_10673_SK_frame_964.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10673_SK_frame_964.cut.vrt GX_10673_SK_frame_964.xyz