I'm trying to figure out components I need for a setup to use for creating orthomosaics and also doing photogrammetry calculations with the Phantom Vision 2. I'm also planning on getting a camera such as the Samsung NX 1000 that someone recommended in these forums, particularly for imagery(for orthos and DEMs) and not video. I might even try my GoPro for testing before getting a nicer camera.
Some questions I have:
1. Should I get a gimbal for the camera attachment?
2. How do I georeference the pictures that are taken by the camera? Maybe the DJI iOSD mini /datalink has something to do with this? I plan on getting GCP's, but would like to have the photos to be geotagged or at least have points associated with them.
3. How do I make a camera take a picture every N seconds or at certain locations? I'm not sure how the camera will hook up.
4. (Bonus) Any recommendations for multispectral sensors?
Any other advice is appreciated! Thanks!!!
Replies
Greetings,
1) I acquired a fixed mount for this purpose. Orthophotos should be shot horizontal to the surface.
2) I am using GCPs quite successfully, but I have access to a high quality GPS unit so can get very good accuracy. Feeding the GPS data from the DJI to the camera would be nice.
3) I just have it take a picture every 3 seconds while flying at 300 feet AGL and < 10 mph. This gives me the appropriate coverage.
4) Check out Event 38 or Aeromao's sites for some good options.
-David
Thanks for the input David, I really appreciate it!
1. I understand how ortho's work, but I know that the roll/pitch/yaw of the quadcopter doesn't always provide a 90 degree angle with the ground, thus the question. I'm assuming you're doing well without one.
2. From what I'm reading, it sounds like most people have a hard time getting accurate GPS signals from drones given the speed and low quality of the GPS receiver. I imagine a separate higher quality GPS receiver could be somehow paired with a camera, but I guess I'll just have to work with GCPs.
3. Thanks for the details. I imagined this would be the case. I need to look into potential cameras more.
4. Great, Thanks!!
Justin