#!/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 25.06618765 57.18579164 -gcp 21600.0 0.0 25.07196584 57.09920621 -gcp 21600.0 23961.0 24.89813194 57.09384327 -gcp 0.0 23961.0 24.88737736 57.18145137 GX10514/GX_10514_SK_frame_432.jpg GX_10514_SK_frame_432.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "333.0 3798.0\n468.0 21030.0\n21090.0 21168.0\n20928.0 3384.0" | \
  gdaltransform -tps -output_xy GX_10514_SK_frame_432.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10514_SK_frame_432.vrt GX_10514_SK_frame_432.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10514_SK_frame_432.cut.vrt GX_10514_SK_frame_432.xyz