Fig. 3From: Pollination success of Fraxinus excelsior L. in the context of ash diebackMother tree. a 1619_81 and b 1898_14 with their potential identified father trees and their number of offspring in the seed orchard Schorndorf. Orthophoto taken with drone XR6 (Airborne Robotics, London, UK) equipped with a four-channel multispectral camera (Tetracam Micro-MCA 4, Chatsworth, CA, USA) on 12.07.2018; coordinate system UTM 32NBack to article page