#!/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 27.13893414 56.77556209 -gcp 21600.0 0.0 27.15007067 56.85883904 -gcp 21600.0 23775.0 27.31711864 56.85294964 -gcp 0.0 23775.0 27.3094368 56.7697066 GX10673/GX_10673_SK_frame_950.jpg GX_10673_SK_frame_950.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "888.0 3744.0\n624.0 20544.0\n20304.0 20808.0\n20400.0 3648.0" | \
  gdaltransform -tps -output_xy GX_10673_SK_frame_950.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10673_SK_frame_950.vrt GX_10673_SK_frame_950.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10673_SK_frame_950.cut.vrt GX_10673_SK_frame_950.xyz