#!/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 24.83436347 56.79408573 -gcp 21600.0 0.0 24.80209032 56.87908466 -gcp 21600.0 21975.0 24.96934509 56.9066456 -gcp 0.0 21975.0 25.01065018 56.80595911 GX2261/GX_2261_SK_frame_58.jpg GX_2261_SK_frame_58.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2064.0 2472.0\n2112.0 19872.0\n17400.0 19896.0\n17208.0 2280.0" | \
  gdaltransform -tps -output_xy GX_2261_SK_frame_58.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_2261_SK_frame_58.vrt GX_2261_SK_frame_58.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_2261_SK_frame_58.cut.vrt GX_2261_SK_frame_58.xyz