Hello,

I would like to do a hybrid adjustment in JAG3D combining Total station observation od 3D traverse, Leveling data and GNSS vectors. Now, GNSS vectors are derived from TBC, and proccesed in WGS84 coordinate system. I was thinking of using the WGS84 system for the whole adjustment, and then transforming the resulting coordinates into my desired system.

What is the desired system, and is it not possible to use this system to perform the adjustment process?

Firstly, how does the height data derived from total station observation compare to leveling data in the software?

Depending on the network design and dimensions, the data from the total station can be used directly. If the data refers to a real spatial network, it is not necessary to divide the raw observations (directions, zenith angles, slope distances) it into a horizontal part (direction and horizontal distances) and a height part (height differences). Moreover, each observation has its own individual uncertainty, which is used to derive a specific weight within the adjustment procedure. It is up to you and your specific weights to increase the impact of the leveling data w.r.t. the total station data.

Secondly, how will the leveling data combine with the adjustment? I would have a reference point with the height of the local site (my height system that I desire to have my final heights in) but the coordinates and GNSS vectors are in another system as specified before (WGS84). Can this adjustment compute?

Perhaps, but usually not, because you have to define a uniform datum, and - as far as I understand your explanation - this requirement is probably not fulfilled in your case.

Kind regards
Micha