#!/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 22.6268802 57.7149815 -gcp 17754.0 0.0 22.55749609 57.72181374 -gcp 17754.0 17817.0 22.57032982 57.76006668 -gcp 0.0 17817.0 22.64243012 57.75206417 GX18588/GX_18588_SK_frame_80.jpg GX_18588_SK_frame_80.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "3768.0 2376.0\n3528.0 15720.0\n16080.0 15696.0\n16008.0 2376.0" | \
  gdaltransform -tps -output_xy GX_18588_SK_frame_80.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_18588_SK_frame_80.vrt GX_18588_SK_frame_80.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_18588_SK_frame_80.cut.vrt GX_18588_SK_frame_80.xyz