#!/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 24.50498343 57.14490137 -gcp 22809.0 0.0 24.50756764 57.23616362 -gcp 22809.0 20997.0 24.66271877 57.23753006 -gcp 0.0 20997.0 24.66557264 57.14417964 GX10802/GX_10802_SK_frame_409.jpg GX_10802_SK_frame_409.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1440.0 1848.0\n1800.0 18384.0\n21000.0 18336.0\n21048.0 1608.0" | \
  gdaltransform -tps -output_xy GX_10802_SK_frame_409.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10802_SK_frame_409.vrt GX_10802_SK_frame_409.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10802_SK_frame_409.cut.vrt GX_10802_SK_frame_409.xyz