Viewpoint

In perspective drawing the viewpoint defines the position of the observer of the scene. It is the position from which the eyes of the observer view (see) the subject, and thus defines what is seen and what is hidden from observation. Generically, a viewpoint defines a subjective observation of an element made by an observer which represents the view (perspective) of that observer, but which may not uncover the whole of the truth or characteristics of the element being observed.