I’m pretty sure these companies/websites have comparisons or white papers regarding RTK/PPK but not sure they qualify as “scientific.” I don’t think it will change your mind though.
Geocue
DroneDeploy
DroneDJ
Aerotas
Microdrones
PeteM, we have already discussed this earlier in this thread. It’s not just about accuracy and how much the equipment costs. Like I said before, repeatability and confidence play a big part too. And GCPs shouldn’t even be a factor because you have to have them no matter what you use.
You are...
1. I followed Aerotas instructions for CORS and did not select a CORS station close enough to work and then applied those instructions to processing my base.
2. Because of 1, I was not entering in the exact location of the base. I was “reading Rinex header.” I then used OPUS to get exact...
Antenna reference point? What is that? How does that relate to the camera/drone? Sorry, I just don’t understand.
Where do you see that? I just looked through everything on their website and don’t see anything regarding post processing.
Thank you for sharing your workflow. Geoadjust seems great. I’ve been using Aerotas’ free excel file for processing the timestamp file with the corrected positions.
So you are using the PPKRAW file for post processing? How is that different from the obs file? I’m also not sure why you need the...
And yes, there is also the logistical part of it as doktorinjh pointed out. Where you can still be confident in the data based on fewer check shots and established PPK workflows instead of relying on poor GCP geometry due to access, etc.
I think you missed my point. I never said “millimetric.” Millimeter accuracy is not attainable. It’s less about the level of accuracy and more about a confidence level in claiming and proving a specific accuracy and repeating that accuracy.
We would probably get similar results 9 out of 10...
From a land surveyor perspective, there is a confidence in accuracy and repeatability that must be achieved due to the liability associated with the data once it’s signed off and handed over. Land surveyors notoriously never trust the equipment 100%, are obsessed with reducing opportunities for...
I set flight panels and tie features and use them all as check points. Then if I need to hold some as GCPs it’s easy to do.
I’m a land surveyor and still fairly new to photogrammetry and drones so I’m definitely not an expert in this.
Those are the same thing to me... a photo identifiable point with known coordinates. And check points turn into GCPs if you hold them during processing.
Or tied to an internet connection. More freedom with PPK.
I attended the ASPRS conference in Denver and the consensus there was PPK is best with RTK a close second. True DG with high end IMU is actually best but that’s a lot more expensive.
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