There is a Kickstarter going right now offering online processing of aerial images (mapping) for quality quad pilots who are good at using their ground station software. It looks kind of like "Drone Mapper" but will let you use it for free.
https://www.kickstarter.com/projects/1950977397/mapping-with-drones
https://www.kickstarter.com/projects/1950977397/mapping-with-drones