Mark Gingrich ([EMAIL PROTECTED]) reported here that a sundial at Singleton, NSW, Australia is claimed locally to be the world's largest. It is a horizontal dial with a 7.92 metre high gnomon. That doesn't strike me as very big.
The Team Disney sundial (http://www.fsec.ucf.edu/~at/disndial.htm) is much bigger: 120' (over 36 metres) high. But it does not have a complete horizontal dial 120' below the gnomon, so its area is quite small. Is that the largest? How does one measure 'largest'. The distance from the tip of the gnomon to the dial surface is one measure, the area of the dial is another, but there may be others. By 'sundial' I mean to exclude meridian lines, some of which are huge but which do not tell the time except at noon. It strikes me that somewhere in the world must be looking for a suitable design for a millennium monument, and the world's largest sundial might be an amusing conceit. Chris Lusby Taylor Newbury, Berkshire, England
