#!/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 22.6181852 57.70204908 -gcp 10857.0 0.0 22.55378366 57.70735146 -gcp 10857.0 10800.0 22.56482363 57.74347252 -gcp 0.0 10800.0 22.6302887 57.73699047 GX18588/GX_18588_SK_frame_079.jpg GX_18588_SK_frame_079.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "864.0 1491.0\n10104.0 1320.147075208914\n10104.0 9335.933147632313\n792.0 9216.361002785514" | \
  gdaltransform -tps -output_xy GX_18588_SK_frame_079.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_18588_SK_frame_079.vrt GX_18588_SK_frame_079.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_18588_SK_frame_079.cut.vrt GX_18588_SK_frame_079.xyz