#!/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 25.8152318 56.69596496 -gcp 15234.0 0.0 25.82310677 56.60633841 -gcp 15234.0 13953.0 25.67464113 56.60123688 -gcp 0.0 13953.0 25.66329002 56.69087436 GX10511/GX_10511_SK_frame_54.jpg GX_10511_SK_frame_54.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1116.0 1032.0\n14580.0 804.0\n14484.0 12324.0\n1044.0 12288.0" | \
  gdaltransform -tps -output_xy GX_10511_SK_frame_54.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10511_SK_frame_54.vrt GX_10511_SK_frame_54.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10511_SK_frame_54.cut.vrt GX_10511_SK_frame_54.xyz