Association Source

Documentation
The "sourceCRS" and "targetCRS" associations are mandatory for coordinate transformations only. Coordinate conversions have a source CRS and a target CRS that are NOT specified through these associations, but through associations from GeneralDerivedCRS to SingleCRS.

For a concatenated coordinate operation sequence of n coordinate operations:
source CRS (concatenated coordinate operation) = source CRS (coordinate operation step 1)
target CRS (coordinate operation step i) = source CRS (coordinate operation step i+1); i = 1 ...(n-1)
target CRS (concatenated coordinate operation) = target CRS (coordinate operation step n)
Instead of a forward coordinate operation, an inverse coordinate operation may be used for one or more of the coordinate operation steps mentioned above, if the inverse coordinate operation is uniquely defined by the forward coordinate operation method.


DerivedNoLink Class--Not Defined--
Element 1CC_CoordinateOperationElement 2SC_CRS
Role 1coordOperationFromRole 2sourceCRS