How to record Z value automatically

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1

I was wondering how to record Z value when I’m mapping out points. I use Qfield and Emlid reach. An answer on GIS stack exchange says to put Z($geometry). I was wondering, does just $Z work as well? What does the Z($geometry) do differently? And, is it possible to use a GNSS variable for Z value. I would rather want the field to be empty if there is a sudden loss of connection to base.

And, Qfield does not seem to correct the altitude height. Any ideas?

Imported from GitHub discussion by @xyzadh on 2022-11-06T19:36:42Z

2

Hi

I noticed, you have to create point later with Z field. When you add geoid file *.tiff to qfield then you can save the height value with either $z or Z($geometry).

Imported from GitHub comment by @kstulka on 2023-02-15T20:50:45Z