#!/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 26.18805 56.69991667 -gcp 21600.0 0.0 26.19405 56.61631667 -gcp 21600.0 21849.0 26.042 56.61076667 -gcp 0.0 21849.0 26.02971667 56.69556667 GX10511/GX_10511_SK_frame_62.jpg GX_10511_SK_frame_62.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "984.0 2520.0\n20808.0 1968.0\n20688.0 19848.0\n864.0 19512.0" | \
  gdaltransform -tps -output_xy GX_10511_SK_frame_62.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10511_SK_frame_62.vrt GX_10511_SK_frame_62.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10511_SK_frame_62.cut.vrt GX_10511_SK_frame_62.xyz