#!/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 26.61462543 57.15022373 -gcp 21537.0 0.0 26.62567541 57.233629 -gcp 21537.0 23466.0 26.79371708 57.22843659 -gcp 0.0 23466.0 26.78768231 57.14377318 GX10802/GX_10802_SK_frame_370.jpg GX_10802_SK_frame_370.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "936.0 2328.0\n912.0 18984.0\n20688.0 19008.0\n20784.0 2160.0" | \
  gdaltransform -tps -output_xy GX_10802_SK_frame_370.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10802_SK_frame_370.vrt GX_10802_SK_frame_370.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10802_SK_frame_370.cut.vrt GX_10802_SK_frame_370.xyz