[Therion] Magnetic declination

Ladislav Blažek ladislav at lblazek.cz
Fri Mar 2 17:05:28 CET 2018


Hi,

declination should be calculated automatically based on the survey date.
Declination parameter is for manual correction.

\LB

2. 3. 2018 v 16:29, Martin KERN via Therion <therion at speleo.sk>:

> Quick question concerning the magnetic declination.
> 
> How you indicate it?
> 
> Just by entering the date or with the command <declination>?
> 
> Because when I just specify the date, the declination which is calculate is for the first January, even if I specify another month in the centreline (e.g. 28.08.2017). Consequently, centreline is slightly offset that if I enter the real declination for the date.
> 
> I don’t know if this shift is important for survey accuracy or if I can ignore it ?
> 
>  
> 
> Thanks and sorry for all my questions.
> 
> Martin K.
> 
> 
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