> If you make the dial with a tublular gnomon, and you design the face so that the time is read from the center of the shadow instead of the edges of the gnomon's shadow, then you eliminate the Noon Gap. Do you think this is the best solution? <
>From the point of view of an accurate dial, one that can be calculated and one that members of the public can read easily, I am certain that it is. I have designed two 12m (or so) diameter dials this way and, by a proper choice of gnomon diameter the shadow is very easy to read. Indeed, if you want a bit of fun, if you have Google Earth and care to type in 52 45' 16.28"N, 01 08' 12.33" W then you go directly to the second of these dials. It's in Barrow-on-Soar in Leicestershire, UK. The time can even be read from space (well, with good magnifcation it can <g>). Google Earth's imaging is so good that I have even thought of trying to calculate what day that photo was taken - though I haven't done so yet. (If anyone wants to try, the gnomon length was such that the shadow on the summer solstice just touches the outer diameter of the chapter ring which is just inside the 'mini-stonehenge' like stone circle). Regards Patrick --------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial
