# Orthographic Projection

Also found in: Dictionary, Acronyms, Wikipedia.

## orthographic projection

[¦ȯr·thə¦graf·ik prə′jek·shən]
(crystallography)
A projection for displaying the poles of a crystal in which the poles are projected from a reference sphere onto an equatorial plane by dropping perpendiculars from the poles to the plane.
(graphic arts)
(mapping)
A perspective azimuthal projection of one hemisphere produced by straight parallel lines from any point desired from an infinite distance; it is true to scale at the center only.
(mathematics)

## orthographic projection

A method of projection in which a three-dimensional object is represented by projecting lines perpendicular to a picture plane. See also: Projection drawing

## Orthographic Projection

a perspective cartographic projection. Because of considerable distortions, it is not used in cartography.

## orthographic projection

Projection in which exact views of an object are constructed by extending perpendiculars from points on the object to the plane of projection.
References in periodicals archive ?
Explain the reason for the location of views on an object in an orthographic projection.
Apply the conventions of an orthographic projection to create an accurate model.
The programmer can spin and inspect the part solid on the screen without trying to visualize it from orthographic projections.
The students have to create virtual 3-D models and angle orthographic projections of the top, side, and end elevation of their cars.
Pupils will be given a brief to design a futuristic F-1 car, using PTC's Pro/DESKTOP software package, in addition to producing supporting evidence of their concept such as orthographic projections, colour isometric drawings and three-dimensional rendering.
Even in a 3D scenario, the end result is 2D orthographic projections arranged and noted on paper.
Scarpa condenses conventional categories -- sketch, working, shop and presentation drawings -- onto single sheets with meticulously drafted orthographic projections worked and reworked in many freehand layers and surrounded by sketches of perspective views and construction details.
Mylar film or drafting vellum can be used to draw orthographic projections of the casting to better visualize all elevations.

Site: Follow: Share:
Open / Close