Plants in the park – sketch 02 sketch02 Some example of snapping option. LeafSnap https://itunes.apple.com/us/app/leafsnap/id430649829?mt=8 iPflanzen http://www.gardenista.com/posts/diy-identify-leaves-and-flowers-theres-an-app-for-that Map of almost trees in Central Park http://centralparknature.com/index.html