Re:

[Greg Troxel]

"Gary E. Miller" <gem@rellim.com> writes:

> Yo Anton!
>
> On Tue, 6 Sep 2022 14:11:57 +0200
> Anton Strydom <agstrydom@gmail.com> wrote:
>
>> The surveyors's datum was WGS84 with center meridian 29 or LO29
>
> If you do not know which WGS84, then you could be off a meter or more.
> Then to get cm or better you need to factor in crustal movements.

I find it surpising that a surveyor would give you cm-grade positions in
WGS84.

Yes, at cm level you need to track epoch of data and apply velocities.

>> It is in a RTK mode yes the datum is default as shipped with the
>> receiver
>
> As long as the baseline is short, you will get good relative measurements
> that way.

With RTK you get coordinates in the frame of the reference station.  You
should be able to understand that.

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