/**
 \defgroup ITKSpatialObjects Module ITKSpatialObjects 
 SpatialObjects are intended to represent regions in space.
The basic functionality of a SpatialObject is to answer the question of
whether a physical point is inside or outside of the SpatialObject. They are
commonly used for representing masks in an analytical form, as well as
approximations of shape by combining them into hierarchical structures similar
to scene graphs. 
 \par Dependencies:
 \li \ref ITKIOImageBase 
 \li \ref ITKImageFunction 
 \li \ref ITKMesh 
 \li \ref ITKMetaIO 
 \dot 
 graph "ITKSpatialObjects" { 
 "ITKSpatialObjects" -- "ITKIOImageBase"; 
 "ITKSpatialObjects" -- "ITKImageFunction"; 
 "ITKSpatialObjects" -- "ITKMesh"; 
 "ITKSpatialObjects" -- "ITKMetaIO"; 
 } 
 \enddot 
 */

