# orthogonal projection

## orthographic projection

noun
a two-dimensional graphic representation of an object in which the projecting lines are at right angles to the plane of the projection. Also called orthogonal projection. Compare isometric ( def 5 ).

Origin:
1660–70

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World English Dictionary
 orthogonal projection —n engineering the method used in engineering drawing of projecting views of the object being described, such as plan, elevation, side view, etc, at right angles to each other

 orthographic projection —n 1. a style of engineering drawing in which true dimensions are represented as if projected from infinity on three planes perpendicular to each other, avoiding the effects of perspective 2. a type of zenithal map projection in which the area is mapped as if projected from infinity, with resulting distortion of scale away from the centre

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orthogonal projection

common method of representing three-dimensional objects, usually by three two-dimensional drawings, in each of which the object is viewed along parallel lines that are perpendicular to the plane of the drawing. For example, an orthographic projection of a house typically consists of a top view, or plan, and a front view and one side view (front and side elevations)

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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