#!/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 22.34438475 57.71851435 -gcp 10956.0 0.0 22.36859322 57.68351646 -gcp 10956.0 10800.0 22.30424166 57.67149268 -gcp 0.0 10800.0 22.28100985 57.70520583 GX18588/GX_18588_SK_frame_091.jpg GX_18588_SK_frame_091.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "840.0 1539.0\n10248.0 1440.2139275766021\n10128.0 9311.973259052924\n864.0 9192.160445682452" | \
  gdaltransform -tps -output_xy GX_18588_SK_frame_091.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_18588_SK_frame_091.vrt GX_18588_SK_frame_091.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_18588_SK_frame_091.cut.vrt GX_18588_SK_frame_091.xyz