#!/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 24.67673742 57.14320911 -gcp 22809.0 0.0 24.68359709 57.23533541 -gcp 22809.0 20997.0 24.83948708 57.23268762 -gcp 0.0 20997.0 24.83650446 57.1409782 GX10802/GX_10802_SK_frame_406.jpg GX_10802_SK_frame_406.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1968.0 1920.0\n2088.0 18744.0\n21552.0 18744.0\n21600.0 1608.0" | \
  gdaltransform -tps -output_xy GX_10802_SK_frame_406.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10802_SK_frame_406.vrt GX_10802_SK_frame_406.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10802_SK_frame_406.cut.vrt GX_10802_SK_frame_406.xyz