#!/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 25.76557875 56.69748451 -gcp 14934.0 0.0 25.77647924 56.61017645 -gcp 14934.0 14211.0 25.62555671 56.60291916 -gcp 0.0 14211.0 25.61097622 56.69154627 GX10511/GX_10511_SK_frame_53.jpg GX_10511_SK_frame_53.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1116.0 1380.0\n14664.0 1080.0\n14568.0 12756.0\n972.0 12744.0" | \
  gdaltransform -tps -output_xy GX_10511_SK_frame_53.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10511_SK_frame_53.vrt GX_10511_SK_frame_53.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10511_SK_frame_53.cut.vrt GX_10511_SK_frame_53.xyz