#!/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 22.40550615 57.73571989 -gcp 10872.0 0.0 22.42846012 57.69915402 -gcp 10872.0 10800.0 22.36621141 57.68468077 -gcp 0.0 10800.0 22.33222815 57.72112034 GX18588/GX_18588_SK_frame_089.jpg GX_18588_SK_frame_089.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "840.0 1587.0\n10128.0 1343.893036211699\n10128.0 9287.973259052924\n984.0 9240.04011142061" | \
  gdaltransform -tps -output_xy GX_18588_SK_frame_089.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_18588_SK_frame_089.vrt GX_18588_SK_frame_089.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_18588_SK_frame_089.cut.vrt GX_18588_SK_frame_089.xyz