#!/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 22.64608454 57.73088133 -gcp 10842.0 0.0 22.57776797 57.73819554 -gcp 10842.0 10800.0 22.58514701 57.77139158 -gcp 0.0 10800.0 22.65446084 57.76993147 GX18588/GX_18588_SK_frame_081.jpg GX_18588_SK_frame_081.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "960.0 1539.0\n10176.0 1368.2139275766021\n10128.0 9479.986629526464\n1056.0 9456.187186629526" | \
  gdaltransform -tps -output_xy GX_18588_SK_frame_081.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_18588_SK_frame_081.vrt GX_18588_SK_frame_081.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_18588_SK_frame_081.cut.vrt GX_18588_SK_frame_081.xyz