#!/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 25.03748528 57.2015075 -gcp 12009.0 0.0 25.04573286 57.18120096 -gcp 12009.0 12495.0 25.00940906 57.17612451 -gcp 0.0 12495.0 24.99890685 57.19533707 GX18586/GX_18586_SK_frame_47.jpg GX_18586_SK_frame_47.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1362.0 1272.0\n1362.0 2034.0\n612.0 2112.0\n744.0 11550.0\n11976.0 11580.0\n11748.0 1014.0" | \
  gdaltransform -tps -output_xy GX_18586_SK_frame_47.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_18586_SK_frame_47.vrt GX_18586_SK_frame_47.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_18586_SK_frame_47.cut.vrt GX_18586_SK_frame_47.xyz