#!/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 24.71140012 57.03935893 -gcp 21414.0 0.0 24.7214362 57.13723476 -gcp 21414.0 21789.0 24.89663184 57.12905269 -gcp 0.0 21789.0 24.89012259 57.03816236 GX2206/GX_2206_SK_frame_89.jpg GX_2206_SK_frame_89.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "816.0 2952.0\n936.0 19572.0\n21408.0 19392.0\n21384.0 2904.0" | \
  gdaltransform -tps -output_xy GX_2206_SK_frame_89.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_2206_SK_frame_89.vrt GX_2206_SK_frame_89.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_2206_SK_frame_89.cut.vrt GX_2206_SK_frame_89.xyz