#!/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 25.3981331 57.32754475 -gcp 12009.0 0.0 25.39991959 57.30641242 -gcp 12009.0 12495.0 25.36010594 57.30630344 -gcp 0.0 12495.0 25.35860823 57.32615526 GX18586/GX_18586_SK_frame_16.jpg GX_18586_SK_frame_16.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1056.0 852.0\n1059.0 1818.0\n276.0 1842.0\n216.0 9420.0\n11592.0 9444.0\n11532.0 756.0" | \
  gdaltransform -tps -output_xy GX_18586_SK_frame_16.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_18586_SK_frame_16.vrt GX_18586_SK_frame_16.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_18586_SK_frame_16.cut.vrt GX_18586_SK_frame_16.xyz