1918•Mineralogical Magazine and Journal of the Mineralogical SocietyRequires access
On changing the plane of a gnomonic or stereographic projection
Harold Hilton
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Abstract
Consider the poles of the faces of a crystal and the zones (great circles) which join them. Suppose we have given their gnomonic projection on to a certain tangent-plane to the fundamental sphere on which these poles and zones lie. We can find the gnomonic projection on any other plane by aid of the gnomonic net, as explained in this Magazine (1904, vol. xiv, p. 19); and similarly for the stereographic or orthographic projection.