A MathMap is a Mapping which allows you to specify a set of forward and/or inverse transformation functions using arithmetic operations and mathematical functions similar to those available in C. The MathMap interprets these functions at run-time, whenever its forward or inverse transformation is required. Because the functions are not compiled in the normal sense (unlike an IntraMap), they may be used to describe coordinate transformations in a transportable manner. A MathMap therefore provides a flexible way of defining new types of Mapping whose descriptions may be stored as part of a dataset and interpreted by other programs.

astMathMap

The MathMap class inherits from the Mapping class.

In addition to those attributes common to all Mappings, every MathMap also has the following attributes:

• Seed: Random number seed

• SimpFI: Forward-inverse MathMap pairs simplify?

• SimpIF: Inverse-forward MathMap pairs simplify?

The MathMap class does not define any new functions beyond those which are applicable to all Mappings.