Re: [Gnuplot-info] Weird spherical mapping?

[Hans-Bernhard B. <HBB...@t-...>]

Am 13.05.2016 um 15:29 schrieb Simon Lenz:

> So as specified in the wikipedia article[1] the spherical->carthesian
> conversion should works like this:

That's overstating things a bit.  The notion that there is "the" mapping 
is incorrect.  There are various ways of defining spherical coordinates, 
not just one.

And Wikipedia knows that, too.  You just have to read the entire 
article, not just look at a single isolated formula.

> For me this seems like an odd non-standard way of doing things.

Given there is no actual standard, nothing can really be non-standard.

gnuplot's spherical coordinates follow the conventions used in 
geography, where latitude zero is at the equator, instead of a pole.