#!/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 26.26036305 57.15154686 -gcp 21537.0 0.0 26.26443456 57.23453676 -gcp 21537.0 23466.0 26.43443356 57.23355135 -gcp 0.0 23466.0 26.43149628 57.1481623 GX10802/GX_10802_SK_frame_376.jpg GX_10802_SK_frame_376.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "912.0 2448.0\n864.0 19128.0\n20688.0 19416.0\n20808.0 2112.0" | \
  gdaltransform -tps -output_xy GX_10802_SK_frame_376.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10802_SK_frame_376.vrt GX_10802_SK_frame_376.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10802_SK_frame_376.cut.vrt GX_10802_SK_frame_376.xyz