Hi All,

I would like to know what would be an acceptable margin of error for the x, y and z axis while doing and aerial survey.

Thanks

Photogrammetry programs like Photoscan or DroneDeploy seem to manage quite well with the error in consumer grade GPS.
You'd probably get more detailed answers in specialised forums for users of those packages rather than here.

That is really determined by any given job.
On some jobs 0.5m resolution  and a few meters in location won't matter.
If your doing volumes or critical elevations then the z axis becomes very important indeed!
I do most of my P3P surveys @5cm/pixel resolution and mostly positional accuracy isn't critical for my purposes. It looks in the range of a few meters or better.
The P3P quotes a hover accuracy of +/- 1.5m horizontal which is different to positional accuracy but a useful guide. You can improve this to survey standard by georectifying with Ground Control Points.
Vertical accuracy is quoted at 0.5m (at survey type altitudes) and is determined by barometer. I haven't done any express measurements but the surveyors I hand some of the results off to seem pretty happy and I think barometric results over the time periods to do a P3 survey would be reasonably consistent.
So unfortunately the answer to your question is "it depends".
Hope this helps a little

Hi ,
Normally , the x,y should be  0 when your drone is not in the air . And the z should be -1;
The bias shouldn't be over 0.1 .