#!/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 24.42384318 57.18307738 -gcp 14175.0 0.0 24.42915201 57.09768973 -gcp 14175.0 14010.0 24.27196091 57.09365358 -gcp 0.0 14010.0 24.26564718 57.18021365 GX10514/GX_10514_SK_frame_420.jpg GX_10514_SK_frame_420.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "444.0 1116.0\n13956.0 816.0\n13896.0 12600.0\n240.0 12504.0" | \
  gdaltransform -tps -output_xy GX_10514_SK_frame_420.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10514_SK_frame_420.vrt GX_10514_SK_frame_420.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10514_SK_frame_420.cut.vrt GX_10514_SK_frame_420.xyz