#!/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 25.31106509 57.30888687 -gcp 12009.0 0.0 25.30460972 57.32924116 -gcp 12009.0 12495.0 25.34333741 57.33223344 -gcp 0.0 12495.0 25.34843825 57.31228723 GX18586/GX_18586_SK_frame_30.jpg GX_18586_SK_frame_30.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1602.0 984.0\n1584.0 1656.0\n702.0 1692.0\n486.0 9030.0\n11664.0 9192.0\n11700.0 1074.0" | \
  gdaltransform -tps -output_xy GX_18586_SK_frame_30.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_18586_SK_frame_30.vrt GX_18586_SK_frame_30.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_18586_SK_frame_30.cut.vrt GX_18586_SK_frame_30.xyz