#!/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 24.94010915 56.6913391 -gcp 21600.0 0.0 24.95377052 56.60501231 -gcp 21600.0 21603.0 24.79958388 56.59641767 -gcp 0.0 21603.0 24.78094894 56.68228226 GX10511/GX_10511_SK_frame_35.jpg GX_10511_SK_frame_35.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "528.0 2004.0\n552.0 19104.0\n21000.0 19200.0\n21096.0 2040.0" | \
  gdaltransform -tps -output_xy GX_10511_SK_frame_35.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10511_SK_frame_35.vrt GX_10511_SK_frame_35.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10511_SK_frame_35.cut.vrt GX_10511_SK_frame_35.xyz