On 19/10/2010 14:06, Michael Rigby-Jones wrote:
> http://sundial.damia.net/vertical/index-en.html
>
>
>
> This is a very neat idea - use Google maps to determine the orientation
> of a wall of a building,

Or a real map (if two landmarks visible) or compass  + protractor

> and then create a custom sundial scale on your
> printer so it tells the correct time when mounted on the wall.
>
>
>
> I wish I had discovered this earlier in the year (I'm sure my daughter
> would have been interested) but sadly the short, dark and wet days have
> arrived in the UK (instead of the longer, brighter wet days we have in
> summer).
>
>
>
>
>
> Mike
>
>
There are some sunny days.
Also you can have a scale showing season.

I have a pocket brass one with elevation scale for gnomon and compass=20
for alignment. Internet not required.

large pocket required.

If you know the time & season accurately, you can use it to find your=20
latitude and longitude (though not very accurately).
--=20
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