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orthographic projection
(redirected from First-angle projection)

   Also found in: Encyclopedia, Wikipedia 0.01 sec.
orthographic projection

orthographic projection
n
1. (Engineering / General Engineering) 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. (Earth Sciences / Physical Geography) 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

orthographic projection
a rendering of an object or floor plan of a building in scale as viewed perpendicularly from above. Cf. isometric projection.
See also: Drawing


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