#!/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 25.25061059 57.32326487 -gcp 12009.0 0.0 25.26308119 57.30378281 -gcp 12009.0 12495.0 25.22480714 57.29696923 -gcp 0.0 12495.0 25.21265408 57.31643242 GX18586/GX_18586_SK_frame_24.jpg GX_18586_SK_frame_24.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1416.0 654.0\n1398.0 1416.0\n456.0 1410.0\n414.0 9342.0\n11832.0 9300.0\n11790.0 642.0" | \
  gdaltransform -tps -output_xy GX_18586_SK_frame_24.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_18586_SK_frame_24.vrt GX_18586_SK_frame_24.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_18586_SK_frame_24.cut.vrt GX_18586_SK_frame_24.xyz