#!/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 147.0 531.0 24 56.333333333333336 -gcp 5595.0 504.0 24.5 56.333333333333336 -gcp 5676.0 7059.0 24.5 56 -gcp 186.0 7101.0 24 56 001/O-35-133.jpg O-35-133.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "147.0 531.0\n5595.0 504.0\n5676.0 7059.0\n186.0 7101.0" | \
  gdaltransform -tps -output_xy O-35-133.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  O-35-133.vrt O-35-133.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES O-35-133.cut.vrt O-35-133.xyz