coordinate precision decreased

hello i have dji phantom 4 pro drone. In my previous photogrammetric studies with this device (flying with 50m flight altitude, 80% longitudinal overlap ratio and 80% transverse overlap ratio) I was getting an error of about 2 cm. In my new photogrammetric study (with the same height and the same overlap ratios) that I made with the same device in the same measurement area, my error amount is between 15 cm and 20 cm. I have always used Map Pilot Pro in my experiments. What part of my device might be damaged?

emre ince 01 फरवरी 2023 12:55

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It all depends on the GPS fix and its quality. If you are looking for repeatable results it is best to let it sit on the ground for a bit before taking off and after every battery changes so it will get a consistent fix.

That being said, sometimes you are going to get lucky and sometimes you are not. The spec for the P4P is probably to be within a few meters. Anything less than that is great but isn't going to be guaranteed.

Zane 02 फरवरी 2023 17:38

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Maybe I didn’t ask the question properly. I transfer the photos I took during my flight with my unmanned aerial vehicle to Agisoft Metashape software and transfer the ground control points whose coordinates I determined with a GNSS signal receiver to Agisoft Metashape software. I am processing Agisoft Metashape software in the order of operations on the site Aerial data processing (with GCPs) - Orthomosaic&DEM generation : Helpdesk Portal. I check the amount of error that occurs as a result of adjustment. The amount of error I am talking about is the errors in the check points and ground control points in the adjustment reports I received after the transaction with Agisoft Metashape software.
The amount of error you mentioned is the general sensitivity values of the coordinates obtained by the GNSS signal receiver during the photo shooting of the unmanned aerial vehicle without RTK feature. I understand what you’re saying.
The change in the amount of error I get with the balancing processes I mentioned above. My work is not just comparing two flight results. I do multiple experiments in the same measuring area and in different measuring area. I can’t get the adjustment results that I had previously with the Agisoft Metashape software. I am using licensed Agisoft Metashape software. Thank you for your reply. Maybe I explained myself better.

emre ince 02 फरवरी 2023 20:30 0 वोट