#!/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 25.36028156 57.3693158 -gcp 12009.0 0.0 25.38837297 57.3386294 -gcp 12009.0 12495.0 25.33378492 57.32290239 -gcp 0.0 12495.0 25.30189571 57.35059321 GX18586/GX_18586_SK_frame_9.jpg GX_18586_SK_frame_9.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1401.0 531.0\n1413.0 1392.0\n432.0 1407.0\n498.0 9078.0\n11832.0 9048.0\n11799.0 474.0" | \
  gdaltransform -tps -output_xy GX_18586_SK_frame_9.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_18586_SK_frame_9.vrt GX_18586_SK_frame_9.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_18586_SK_frame_9.cut.vrt GX_18586_SK_frame_9.xyz