#!/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 23.24538796 57.20089423 -gcp 16863.0 0.0 23.18190793 57.18670347 -gcp 16863.0 16293.0 23.15959094 57.22185918 -gcp 0.0 16293.0 23.22385418 57.23216372 GX18588/GX_18588_SK_frame_40.jpg GX_18588_SK_frame_40.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2364.0 1092.0\n15840.0 840.0\n15924.0 7995.0\n16020.0 15072.0\n2844.0 15210.0" | \
  gdaltransform -tps -output_xy GX_18588_SK_frame_40.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_18588_SK_frame_40.vrt GX_18588_SK_frame_40.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_18588_SK_frame_40.cut.vrt GX_18588_SK_frame_40.xyz