Welcome Inspire Pilots!
Join our free DJI Inspire community today!
Sign up

Using Drone to Mark GCP

Joined
Aug 1, 2021
Messages
46
Reaction score
9
Age
59
Hey everyone. I am interested in hearing what experience says about this. I came across a mapping article in which a software company suggested that in the absence of a base station or other location measurement equipment, to use your drone to mark GCP's. The article said to put your done on the GCP, take a photo and later use the photo metadata to grab the coordinates and call those the accurate location of the GCP's. I was pretty surprised to read that.

So I am interested in whether someone knows why it would be a benefit in some way. Alternatively does someone know if that since we expect errors in our drones GPS, that using them to mark GCP's will cause additional errors. Finally, do you think they will make no difference.
 
Joined
Jun 28, 2016
Messages
1,956
Reaction score
861
Age
59
Hey everyone. I am interested in hearing what experience says about this. I came across a mapping article in which a software company suggested that in the absence of a base station or other location measurement equipment, to use your drone to mark GCP's. The article said to put your done on the GCP, take a photo and later use the photo metadata to grab the coordinates and call those the accurate location of the GCP's. I was pretty surprised to read that.

So I am interested in whether someone knows why it would be a benefit in some way. Alternatively does someone know if that since we expect errors in our drones GPS, that using them to mark GCP's will cause additional errors. Finally, do you think they will make no difference.
This claim is kind of ironic. Here's why. The very REASON for Ground Control Points is BECAUSE consumer-level GPS and GLONASS aren't nearly accurate enough to be used in mapping. Even RTK systems have come up short because they aren't quite accurate enough. The winning ticket MIGHT be PPK. Me and my business partners just "test drove" a $90,000 PPK system (which included LIDAR). The greatest carrot for this system is that it MIGHT eliminate the need for GCP's. This would allow us to ROI this expensive rig in about a year. We flew several test flights for the purpose of collecting data. Unfortunately, that data hasn't been processed as of this writing. So until it is processed we won't know if this new PPK system works well enough to eliminate the need for GCP's.

All that said...

The short answer is "no, you can't use your drone to mark a GCP." At least not for professional mapping. If that were the case, you could us an iPhone.

D
 
Last edited:
  • Like
Reactions: Bill32174
Joined
Aug 1, 2021
Messages
46
Reaction score
9
Age
59
I am of the same camp. But I also know that there is a lot I do not know. And that was why I was so surprised to see a software company suggest the technique. For me,
Error2 (results from using the drone marked gcp’s) > Error1 (expected drone gps error)

I was just interested in thoughts from somebody who understands this better than I do.
 
  • Like
Reactions: Donnie Frank

New Threads

Members online

No members online now.

Forum statistics

Threads
21,858
Messages
208,252
Members
32,020
Latest member
peterb_2795