If the inverse generating projection of a map projection Q is composed with the surface geodetic CS generating function, the resulting function is the generating function of a surface CS (see Figure 5 .4). The CS domain is the MP range. In this International Standard, a map projection CS shall be a surface CS for which the generating function is (implicitly) specified in terms of map projection mapping equations.
, 
is the generating function of a surface CS (see Figure 5 .4). The CS domain is the MP range. 
is not to be confused with 