View source for Polar Sundial Designer

[[File:PolarSundial2.png|300px|right]]
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=====Description=====

'''Polar Sundials''' are positioned on a flat level surface, angled across their width to the location '''[[Latitude]]''' and oriented lengthwise East - West.


=====Features and Applications=====

The [http://en.wikipedia.org/wiki/Gnomon '''Gnomon'''] of a '''Polar Sundial''' is commonly the top edge of a rectangular plate set perpendicular to, and across the centre of, a main 'Dial Plate' and points to '''[[Finding True North|True North]]'''. Since, as with all '''Sundials''',  the [http://en.wikipedia.org/wiki/Gnomon '''Gnomon'''] must remain parallel to the Earth's vertical axis, the entire [http://en.wikipedia.org/wiki/Gnomon '''Gnomon'''] and '''Dial Plate''' assembly must be set at an angle to the horizontal which is equal to the '''[[Latitude]]''' of its location.


{{Packaging Designer Guide}}
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<span style="color: green">'''Note:'''</span>
* <span style="color: green">In the table below, enter the main dimensions of your design as follows:
** The height of the Gnomon ''(GnomonHeight)''</span>
** The width of 'Dial Plate' required ''(PlateWidth)''
** The radius of curvature if a curved plate design is chosen ''(CurvedRadius)''
* <span style="color: green">The table provides the distances of each '''Hour Line''' away from the Noon position and can be marked out directly on to your 'Dial Plate' material - the measurements are repeated on the drawing. </span>
* <span style="color: green">The CAD drawing includes '''[[Template|Templates]]''' for both flat 'Dial Plate' and curved 'Dial Plate' options which can be used to transfer the measurements on to the 'Dial Plate' ''(note that using a curved plate can enable a greater range of hours to be marked . . . and if the CurveRadius is made to equal the GnomonHeight, the semi-circular and equi-spaced dial of an Armillary Sundial results!)''.</span>
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<dtapollonius dwg="/images/3/3f/Sundial_polar.txt"></dtapollonius>


{{Sundials Buyers Guide}}

[[Category:Sundials]]