A sundial is only a sundial when you can read in
some way the time and/or date from it.
With a tower that you can not see a shadow sharp
enough on the ground to read a time and/or date
when you are on the ground. Only from high above
you might get a possibility to read the result.
So only the visitors high in the tower or from an airplane.
Thibaud
At 11:33 27-10-2015, Jackie Jones wrote:
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Can someone please tell me what is the worlds
largest sundial? If a vertical tower, how high
above the ground is the nodus? I have been
consulted by someone who is claiming that a
tower he wants to use as a sundial, which is
162m tall, will be the worlds largest
dial. There are many issues with a dial of this
size, which will be explained to him, but I
would like to know about sizes of other large
dials, please. This is not just a tall building
casting a shadow, but one where there are hour markings on the ground.
With best wishes to you all,
Jackie
Jackie Jones
50° 50 09 N 0° 07 40 W
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