#!/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 24.98877808 56.69090108 -gcp 21600.0 0.0 25.00370852 56.6053173 -gcp 21600.0 21603.0 24.84807411 56.59590439 -gcp 0.0 21603.0 24.83084646 56.68296701 GX10511/GX_10511_SK_frame_36.jpg GX_10511_SK_frame_36.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "768.0 1836.0\n720.0 18900.0\n21228.0 19008.0\n21240.0 1716.0" | \
  gdaltransform -tps -output_xy GX_10511_SK_frame_36.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10511_SK_frame_36.vrt GX_10511_SK_frame_36.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10511_SK_frame_36.cut.vrt GX_10511_SK_frame_36.xyz