#!/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 25.7755294 57.14955596 -gcp 21537.0 0.0 25.77893323 57.2324184 -gcp 21537.0 23466.0 25.94679295 57.23240866 -gcp 0.0 23466.0 25.94849842 57.14756487 GX10802/GX_10802_SK_frame_385.jpg GX_10802_SK_frame_385.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1272.0 2496.0\n984.0 19008.0\n20616.0 19464.0\n20832.0 2376.0" | \
  gdaltransform -tps -output_xy GX_10802_SK_frame_385.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10802_SK_frame_385.vrt GX_10802_SK_frame_385.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10802_SK_frame_385.cut.vrt GX_10802_SK_frame_385.xyz