Hi,
I have been using a GP equipped glider for crop monitoring at work for several seasons (we produce pollen allergens for allergy diagnosis and treatment) and this summer we made the news as the Swedish major agricultural bi-weekly paper made a story about it. The angle is that now farmers can easily build their own drone for crop monitoring.
There is an online video here; http://www.atl.nu/atl-play/bygg-din-egen-dr-nare
I will try and post a copy of the article soon too.
Cheers,
Björn