marker error?

[ascreus]

Hi at all,

please, could someone explain what is the meaning of error in reference windows?

Please, have  a look at my dense cloud model in respect to marker.....

thanks
antonio

[ascreus]

I do not understand why there is a great differenze in the z value betwwen ggp and model....

[Alexey Pasumansky]

Hello ascreus,

I think you are observing the problem similar to the one described in the following article:
https://agisoft.freshdesk.com/support/solutions/articles/31000152491-working-with-dji-photos-altitude-problem-

The altitude loaded for the camera locations is estimated from the different level compared to the GCPs altitude.

[ascreus]

Hy

Yes, I understand the problem but....camera reference have not the flag on!
That should mean that are not considered, or not?

[Alexey Pasumansky]

Hello ascreus,

Have you optimized the camera alignment after introducing the markers and unchecking the cameras?

[ascreus]

yes....

I usually perform a first run only with uav reference
later I introduce gcp, re-alignment, build dense cloud, build dem

When I introduce a new Gcp, I need to manually recognize it in "all" of the photo?

[PROBERT1968]

In my opinion the three GCP 9, 8 and 1 looked like the altitude number is wrong...

They need to be sit at the surface instead of at the sky if you know what I mean.

The rest of other GCP should be ok.

[ascreus]

No, the altitude is correct....

buit the problem is: why there is a big difference beetwen  "evaluated error" and "real" error?

the optimize alignment should "force" the model to have the "real" coordinate...or not?
in other words: introducing markers help to deform the first auto-model or not?
thanks

[skogar]

Hey ascreus,  try setting your camera accuracy to 250 meters & photo angle accuracy to ~5-10°.  That should solve your problem.