#!/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 25.2674192 57.32640574 -gcp 12009.0 0.0 25.278502 57.30669939 -gcp 12009.0 12495.0 25.24145665 57.30001912 -gcp 0.0 12495.0 25.22830968 57.31945472 GX18586/GX_18586_SK_frame_23.jpg GX_18586_SK_frame_23.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1560.0 546.0\n1542.0 1422.0\n576.0 1416.0\n438.0 9036.0\n11976.0 9288.0\n11961.0 810.0" | \
  gdaltransform -tps -output_xy GX_18586_SK_frame_23.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_18586_SK_frame_23.vrt GX_18586_SK_frame_23.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_18586_SK_frame_23.cut.vrt GX_18586_SK_frame_23.xyz