Question:
If hour lines do not lie on the same plane as the base of the gnomon must
they shift and if so does anyone have a formula for this.
Lets imagine concentric circles with 4, 6, 8 and 10 concentric circles
each rising 1/4 above each previous one. If the hour lines are cut into the
surface
Cordasco, Anthony (NJ Data Services) wrote:
Question:
If hour lines do not lie on the same plane as the base of the gnomon must
they shift and if so does anyone have a formula for this.
Lets imagine concentric circles with 4, 6, 8 and 10 concentric circles
each rising 1/4 above each
Hi John and everybody
I can give some information about the coordinates of the cities included in
my program Shadows. I took the coordinate from the Grand Atlas de
geographie de l'Encyclopedie Universalis published in France. In the
copyright notice they say that it is originally a book from
In the US at least, the official times of sunrise and sunset for a
particular city are for the population center of gravity of the city. It's
a good bet that any atlas would use official government sources, and thus,
the definition given above.
--
From: François BLATEYRON
