[Therion] Declination handling imprecise?

[Olly Betts]

On Sat, Feb 18, 2017 at 09:24:42PM +0000, Olly Betts via Therion wrote:
> On Sat, Feb 18, 2017 at 10:20:54AM +0200, Benedikt Hallinger via Therion wrote:
> > For the date-observation, indeed my conclusion came from the summary in the
> > log. Thank you for claryfying this. Good to hear, therion uses fractions
> > here, and 1/12 is perfectly good.
> 
> To be clear, therion calculates the fractional year taking into account the
> day of the month - it just doesn't assign quite equal lengths to every day of
> the year, but instead puts the start of each month 1/12 of a year apart, and
> then splits up each 1/12 into 28, 29, 30 or 31 equal pieces.  Really it
> should split the year into 365 or 366 equal pieces.

FYI, I submitted a patch to address this which Stacho has merged, so the
next release should calculate this using even sized days (leap years aside):

https://github.com/therion/therion/pull/52

> > However i have seen that it looks like the calculated declination is maybe
> > rounded to full degrees? Or is this just an display thing in aven viewer?
> 
> Aven currently only shows a whole number of degrees, which is unhelpful for
> this sort of thing.  It probably ought to show one decimal place.

The next release of Survex will show one decimal place.

Cheers,
    Olly