UAV mapping with a Yuneec H520, Emlid Reach RS+ base station and Emlid Reach M+ custom mount on the H520. While I have over 1,000 maps most of them have been with a Phantom 4 Professional with a very similar setup. This post is to show the diversity of the Emlid equipment and how a little ingenuity can create great results.
This project started several months ago and I have flown approximately 50 missions with the set up and can see that it is every bit as good as my other missions. I like to recommend the H520 because (1) It is a hexacopter which has rotor redundancy that can save you. I speak that from experience. (2) Being a hexacopter it is more stable and can fight adverse conditions much better. (3) The camera is at least on par with the Phantom 4 Pro which I believe is the best camera for mapping still to this day. Image quality, field of view and native distortion reduction is almost like they engineered it for mapping.
I had been thinking about mounting an M+ unit to it for a while, but the lightbulb went off when I found a li-ion battery with the correct specifications from one of my wife’s purses. It even had the micro USB connection and was the right size to mount the M+ and the Tallysman antenna on it.
I also wanted to bring up this project because others need to know that absolute camera position and GPS position don’t matter if you use (GCPs) ground control points. Not even the absolute positioning of my set up on the H520 (with 3M Extreme Dual Velcro) Makes any difference because I am looking for relative accuracy of the images taken In relation to each other. The GCPs do the rest of the work.
The mission was about 1-1/2 miles of roadway on 90 acres of land. It is a multi battery mission and takes about 30 minutes to fly. It was 3-1/2 miles from Austin-Bergstrom airport and required waivers with flight limited to 250 feet. There is about 100 feet of elevation change across the side so it’s not just your every day boring roadway.
With the Emlid kit I was able to reduce the number of GCP’s from 10 to 5. The RMSE’s on the ground control points averaged to 0.21 inches and the 5 checkpoints were 1.8 inches. Everything was processed with the DroneDeploy. While they do not YET support autonomous flight with the H520 you can still process the images.
Solid hardware, a little ingenuity and a good platform supplied very good results! I just wish I had posted this picture for the contest! Can I still get in…
I thank everyone in this community for their assistance and willingness to share!