Level Up Your Drone Data with Only ONE GCP

[@Rogun987]

This is the best video I've seen explaining the whole process.

[@DoYouKnowDrones]

Really appreciate that! Thank you. 😊

[@jamespipe4519]

Amazing video Jason, thank you! James from DroneDeploy here. I think the real reason that the RTK and PPK do not line up is that they are based on different datums. If I had to guess, the PPK matched the AeroPoint as they both using CORS networks that are using the nad83(2011) datum, whereas I guess the RTK2GO corrections were using the more global WGS84 and most recent ellipsoid. Both maps were processed with very high accuracy, and are likely absolutely referenced in XY to within 0.2ft vs their reference datum. Anyway, your workflow to resolve that was great, thanks for sharing. If you want them to match perfectly in the future inside the DroneDeploy interface then you'd need to use an RTK network that uses a NAD83 datum. I think most CORS in the US will be using NAD83(2011).

[@DoYouKnowDrones]

Thank you for the insights, James. I did wonder if a datum shift was responsible for the RTK result, but the documentation on the RTK2GO network was a bit scattered. That being said, I know that DroneDeploy offers RTK Corrections within the Flight App. That’s something that I will showcase in the future.

[@CR3DT]

First and foremost great video. I was also surprised to see such a large shift on the RTK dataset. It almost made me wonder why we invested in an RTK drone in our company. I think that if you get an Emlid and can measure your GCP using the same datum, then the results would be much better or better say closer. You experiment makes RTK look inaccurate, but RTK is actually supposed to be good (very accurate) as long as you don't get any drops. You make me want to go buy an Emlid or a pair of aeropoints. Propeller also has PPK processing, ask them to process your data for the video.

[@kentuckyuas5218]

Fantastic lesson and workflow demonstration. Thanks!

[@DoYouKnowDrones]

I’m very glad that you enjoyed it. Thank you for watching.

[@Red357]

I just wanted to say thank you! Very useful/helpful video!! 45 mins flew by. I’ll have to rewatch a few times to actually catch on to all the different points you made. Thanks!

[@DoYouKnowDrones]

I’m so glad that you enjoyed it. I am working on a follow-up video that simplifies the workflow for DroneDeploy users.

[@kylesupercrossfan]

Great job Jason! Very well thought out

[@DoYouKnowDrones]

Thank you, Kyle. I appreciate your feedback.

[@pixeldawg]

Could you help direct me to the link for the kml download of the CORS Map? I couldn't locate it. Thanks in advance.

[@megadroneuk]

Great video, thanks Jason. I've watched it a couple of times but could you please confirm that in this case the aeropoint has only been used as a checkpoint and not as a GCP in DD processing? Thanks!

[@DoYouKnowDrones]

Confirmed. The AeroPoint was NOT used as a GCP.

[@megadroneuk]

@@DoYouKnowDrones But it was required to set the z coordinate. Thanks for the mega fast response!

[@gregoriomacalisang9288]

That was also what I'am thinking, Aeropoint was not used as a GCP so no georeferencing done. If used as a GCP , It would have been increased the accuracy.

[@imadroner]

Great video Jason (like the name)! I was wondering if you could do a video or share some insight to using a Reach RS2+ on site with the M3E? How accurate would that RTK data be? How do you verify the accuracy without a known checkpoint? I am just getting started and have no survey knowledge, only KZbin U…but I’ve learned a lot. I noticed you used ArcGIS to verify your checkpoints, but am clueless as to what to do. I’ve tried my local Cors station and RTK correction (via Emlid studio) but don’t know how to verify that either. Please shed some light please. Much appreciated! BTW…I just got the Reach RS2+. Jason Breaux

[@troyblackwell5985]

I too would love to see that video!

[@GM6DroneMapping]

Nice job. I especially like the cartoon. Lol. Good stuff

[@itsMellyBih]

Is it ever worth it to have a surveyor come put a reference benchmark directly on the site you’ll be flying from? Are there added benefits of having your own reference benchmark for your base station, such as increased accuracy or ease of use? Or is it completely a waste of money to have that installed on site?

[@andresmontoya3455]

That was a really good explanation. Maybe i'm picky (or confused); but you were explaining about PPK, and @29:56 you got into RTK post processing tab on topodrone. Does that make a difference over the workflow?

[@DoYouKnowDrones]

Thank you. RTK Post Processing is the correct tab for PPK using this data.

[@aerialdroneworksinc.3566]

Excellent job with your explanation of the process. Do you do courses

[@DoYouKnowDrones]

Yes I do! You can find them at www.bluenoseacademy.com

[@2011TMR]

I'm curious if you would mind doing a similar video but capture GCP markers with a GNSS+RTK receiver.

[@DoYouKnowDrones]

I wouldn’t mind at all, but I unfortunately don’t have a GNSS+RTK receiver. I’ve been looking at the EMLID Reach series.

[@2011TMR]

@Do You Know Drones? we recently got an Emlid RS2+ unit and are enjoying it with RTK corrections. I'm curious about the logistics of checkpoints and how to incorporate reliability into the work flow with DroneDeploy.

[@aspinajr]

@@DoYouKnowDrones I live about a mile from where you did this and I have a GNSS receiver. Would you want to get together to do it? I am actually just getting my feet wet in this realm. Let me know. Thanks. Al

[@DoYouKnowDrones]

Hey Al! Which receiver do you have? That sounds like a fun idea.

[@aspinajr]

@@DoYouKnowDrones I have a Trimble DA 2 and I have a Rock Robotic Base Station I am putting up this weekend.

[@dc5581]

Thanks for the video. I guess I am having trouble understanding the practical implementation of this. In the video you are intentionally selecting a site based on the proximity to a CORS station and survey markers. Is this possible in more remote sites? What if you are outside the suggested 15km radius and have no survey markers?

[@DoYouKnowDrones]

Glad that you asked! I’m working on a video for this use case right now. Stay tuned! By the way, the workflow won’t be as disjointed as this one…

[@dpernish]

Couldn't watch the whole thing with that background music so repetitive - otherwise I think this would have been a great video.

[@DoYouKnowDrones]

Appreciate the feedback. When I produce the Top Drone Capture Apps of 2024, I will significantly reduce the background music.

[@egorchorniy346]

Very helpful, thank you, could you please remove or keep it lower music on the background

[@DoYouKnowDrones]

Yes, I’m happy to lower the volume of the background music on future videos. Thank you for watching.