Does anyone know why despite applying a geode when processing with Pix4D Matic, the elevation is processed without taking it into account so that an elevation is still obtained based on the ellipsoid and not based on the geoid?
I am processing images from a Mavic 3M, specifically RGB images from a RTK flight.
Best,
Joan
Hi @joan,
Thank you for your message.
Can you please share the quality report with us? Which geoid model do you want to be applied in your results? Are you using Ground Control Points (GCPs)? Have you tried to process selecting the ellipsoid and compare the results?
Cheers,
Daniele
Hi Daniele,
sure, please find it attached. I want to apply the REDNAP EGM08.
In this case I’m not using GCP.
Yes I tried to process selecting the ellipsoid, trying to assign an offset… and nothing.
To give you more information, I see that Pix4DMatic recognizes drone images with the image coordinate reference system WGS 84 + EGM96 height - EPSG:4326+5773
I don’t understand why it is so when the flights are made in WGS84 (besides, if you process the same images in Pix4D Mapper it only recognizes them as WGS84).
Best,
Joan
cita_rgb-quality_report.pdf (21.2 KB)
(message removed because it contained outdated information)
Hi @joan,
After further review of the quality report, it seems that the “Image coordinate reference system” fell back to WGS 84 + EGM96 height instead of keeping WGS 84 + Ellipsoidal height used generally for RTK drones.
Since PIX4Dmatic 1.46.0, it is possible to manually select the image coordinate reference system.
Please proceed as follows:
Ellipsoidal height over the WGS 84 ellipsoid as vertical CRSPlease let me know how it goes
Fantastic! It seems that the processing is correct.
Thank u very much Daniele!
Best,
Joan
Happy to hear that.
Thank you for the feedback 
Happy mapping!
