#!/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 25.25659818 57.30785379 -gcp 12009.0 0.0 25.25436431 57.32879803 -gcp 12009.0 12495.0 25.29521333 57.32947711 -gcp 0.0 12495.0 25.29581582 57.30861982 GX18586/GX_18586_SK_frame_27.jpg GX_18586_SK_frame_27.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1176.0 1008.0\n1116.0 1932.0\n198.0 1980.0\n312.0 9408.0\n11580.0 9432.0\n11448.0 912.0" | \
  gdaltransform -tps -output_xy GX_18586_SK_frame_27.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_18586_SK_frame_27.vrt GX_18586_SK_frame_27.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_18586_SK_frame_27.cut.vrt GX_18586_SK_frame_27.xyz