DefinitionA <CANONICALLY PARAMETERISED SPHERICAL SURFACE> is a <CANONICALLY PARAMETERISED ELLIPSOIDAL SURFACE> and a <SPHERICAL SURFACE> as follows: σ(u,v) = C + R. cos(v).(cos(u).x + sin(u).y) + R.sin(v).z As defined in ISO 15926 Part 3 Section 4.6.3.13