#!/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 23.23714418 57.21489493 -gcp 16734.0 0.0 23.1722786 57.20516527 -gcp 16734.0 16101.0 23.15623276 57.23959659 -gcp 0.0 16101.0 23.22136655 57.24792753 GX18588/GX_18588_SK_frame_41.jpg GX_18588_SK_frame_41.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2496.0 822.0\n15762.0 720.0\n15822.0 14958.0\n2568.0 14940.0" | \
  gdaltransform -tps -output_xy GX_18588_SK_frame_41.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_18588_SK_frame_41.vrt GX_18588_SK_frame_41.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_18588_SK_frame_41.cut.vrt GX_18588_SK_frame_41.xyz