#!/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 22.51973668 57.76777571 -gcp 10890.0 0.0 22.54606962 57.73373685 -gcp 10890.0 10800.0 22.48386383 57.71928886 -gcp 0.0 10800.0 22.45649667 57.75329118 GX18588/GX_18588_SK_frame_085.jpg GX_18588_SK_frame_085.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "936.0 1347.0\n10152.0 1271.9732590529247\n10032.0 9287.893036211699\n816.0 9120.200557103064" | \
  gdaltransform -tps -output_xy GX_18588_SK_frame_085.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_18588_SK_frame_085.vrt GX_18588_SK_frame_085.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_18588_SK_frame_085.cut.vrt GX_18588_SK_frame_085.xyz