#!/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 26.59301215 57.40315747 -gcp 18063.0 0.0 26.59678916 57.3014896 -gcp 18063.0 18003.0 26.41368366 57.29887742 -gcp 0.0 18003.0 26.40548979 57.39953537 GX8473/GX_8473_SK_frame_223.jpg GX_8473_SK_frame_223.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2424.0 3036.0\n2976.0 15192.0\n16344.0 14904.0\n16224.0 2376.0" | \
  gdaltransform -tps -output_xy GX_8473_SK_frame_223.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_8473_SK_frame_223.vrt GX_8473_SK_frame_223.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_8473_SK_frame_223.cut.vrt GX_8473_SK_frame_223.xyz