14. A method as in claim 1 additionally comprising the step of: accessing an image-based data object by reference to another data object in the scene model through a corresponding link in the correlation mesh.
14. A method as in claim 1 additionally comprising the step of: accessing an image-based data object by reference to another data object in the scene model through a corresponding link in the correlation mesh. 15. A method as in claim 14 wherein at least one other data object is an abstract model data object.