That surprises me too. I’d have expected that the only differences would be that the dial is numbered counterclockwise, & that north & & south are replaced with poleward & equatorward.
On Mon, Apr 3, 2023 at 16:47 Steve Lelievre <steve.lelievre.can...@gmail.com> wrote: > Hi, Roderick, > > My home internet connection is still non-functional so I can't fix it yet, > but it does seem that I will have to add an extra test to handle southern > hemisphere locations and reducing latitudes. Actually, I originally had a > southern hemisphere check in there but took it out after convincing myself > the same frame of reference (x axis east, y axis north, z up) applied to > the spherical trigonometry irrespective of hemisphere. Ho hum. > > Steve > > > On 2023-04-03 6:45 a.m., Rod Wall wrote: > > Hi Steve, > > For both examples below with all sundials at the same Longitude. The > instructions indicate: > > Place the wedge-sundial assembly on a horizontal surface in a nice sunny > location. *Start with the higher end of the wedge to the north* and the > sides aligned on a north-south line and the sharp edge should be on an > east-west line. > > Example 1: > > If you have a sundial that was designed for Latitude -20 deg. And relocate > it at Latitude -50 deg. > > Would you start with the higher end of the 30 deg wedge to the North. Or > would it be to the South? > > ***** > > Example 2: > > If you have a sundial that was designed for Latitude 50 deg. And relocate > it at 20 deg. > > Would you start with the higher end of the 30 deg wedge to the North. Or > would it be to the South? > > ***** > > Please correct me if I am wrong. I think that both examples would be to > the South. > > Roderick. > > --------------------------------------------------- > https://lists.uni-koeln.de/mailman/listinfo/sundial > >
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