#!/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 26.44021312 56.78178271 -gcp 21600.0 0.0 26.46018505 56.8651497 -gcp 21600.0 23775.0 26.62922859 56.85253904 -gcp 0.0 23775.0 26.60807133 56.76951846 GX10673/GX_10673_SK_frame_962.jpg GX_10673_SK_frame_962.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "912.0 3888.0\n936.0 20928.0\n20424.0 21000.0\n20424.0 3360.0" | \
  gdaltransform -tps -output_xy GX_10673_SK_frame_962.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10673_SK_frame_962.vrt GX_10673_SK_frame_962.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10673_SK_frame_962.cut.vrt GX_10673_SK_frame_962.xyz