Basic Words Used In Perspective Drawing
Station point(SP): this is the position of the viewer (observer).
Eye Level (EL): this is the position of the eye of the viewer if the object is viewed from below
Eye view: if it is viewed so that you cannot see the top or bottom of the object, it is called the HORIZONTAL VIEW.
Line of Sight or Visual Point: the lines or rays from the object to the eye level.
Picture plane (PP): the vertical transparent plane, placed between the object and station point which the perspective view will be projected.
Group line (GL): the horizontal plane on which the observer stands intersect the picture plane on the ground line.
Horizon Line (HL): this is the horizontal line on the picture plane which is at the eye level of the observer.