#!/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 660.0 951.0 23 57.333333333333336 -gcp 11214.0 861.0 23.5 57.333333333333336 -gcp 11373.0 13971.0 23.5 57 -gcp 693.0 14007.0 23 57 O-34-107.jpg O-34-107.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "660.0 951.0\n11214.0 861.0\n11373.0 13971.0\n693.0 14007.0" | \
  gdaltransform -tps -output_xy O-34-107.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  O-34-107.vrt O-34-107.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES O-34-107.cut.vrt O-34-107.xyz