DefinitionA <CANONICALLY PARAMETERISED SURFACE OF REVOLUTION> is a <PARAMETERISED SURFACE> and a <SURFACE OF REVOLUTION> and an <U UNBOUNDED SURFACE>; it has the canonical parameterisation for a surface of revolution as follows: σ(u,v) = C + (λ(v) - C).cos(u) + ((λ(v) - C)&amp;#183;V).V(1 - cos(u)) + V&amp;#215;(λ(v) - C).sin(u) As defined in ISO 15926 Part 3 Section 4.6.3.16