#!/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 25.19747573 56.69016043 -gcp 21600.0 0.0 25.21540003 56.6059142 -gcp 21600.0 21480.0 25.06043985 56.59484051 -gcp 0.0 21480.0 25.04330092 56.68170821 GX10511/GX_10511_SK_frame_41.jpg GX_10511_SK_frame_41.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "264.0 2016.0\n204.0 19068.0\n20568.0 19296.0\n20712.0 1680.0" | \
  gdaltransform -tps -output_xy GX_10511_SK_frame_41.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10511_SK_frame_41.vrt GX_10511_SK_frame_41.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10511_SK_frame_41.cut.vrt GX_10511_SK_frame_41.xyz