#!/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 25.2941215 57.14921703 -gcp 14289.0 0.0 25.29778004 57.23310563 -gcp 14289.0 14253.0 25.45274734 57.23227528 -gcp 0.0 14253.0 25.45212507 57.14712476 GX10802/GX_10802_SK_frame_394.jpg GX_10802_SK_frame_394.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "480.0 1371.0\n13968.0 1056.0533037201556\n13896.0 12431.946696279845\n624.0 12551.960022209882" | \
  gdaltransform -tps -output_xy GX_10802_SK_frame_394.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10802_SK_frame_394.vrt GX_10802_SK_frame_394.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10802_SK_frame_394.cut.vrt GX_10802_SK_frame_394.xyz