Inter-relate two coordinate systems
"
input" points) to give a new set of coordinates (representing " output" points).
It is used to describe the relationship which exists between two different
coordinate systems and to implement operations which make use of this (such as
transforming coordinates and resampling grids of data). However, the Mapping class
does not have a constructor function of its own, as it is simply a container
class for a family of specialised Mappings which implement particular types of
coordinate transformation. Invert: Mapping inversion flag
IsLinear: Is the Mapping linear?
IsSimple: Has the Mapping been simplified?
Nin: Number of input coordinates for a Mapping
Nout: Number of output coordinates for a Mapping
Report: Report transformed coordinates?
TranForward: Forward transformation defined?
TranInverse: Inverse transformation defined?
astDecompose: Decompose a Mapping into two component Mappings
astTranGrid: Transform a grid of positions
astInvert: Invert a Mapping
astLinearApprox: Calculate a linear approximation to a Mapping
astMapBox: Find a bounding box for a Mapping
astMapSplit: Split a Mapping up into parallel component Mappings
astQuadApprox: Calculate a quadratic approximation to a 2D Mapping
astRate: Calculate the rate of change of a Mapping output
astRebin<X>: Rebin a region of a data grid
astRebinSeq<X>: Rebin a region of a sequence of data grids
astResample<X>: Resample a region of a data grid
astRemoveRegions: Remove any Regions from a Mapping
astSimplify: Simplify a Mapping
astTran1: Transform 1-dimensional coordinates
astTran2: Transform 2-dimensional coordinates
astTranN: Transform N-dimensional coordinates
astTranP: Transform N-dimensional coordinates held in separate arrays