ORTHOGONAL
/ ORTHOGRAPHIC

2D IMAGES
CREATED AND
MANAGED BY
EDUCATION GRAPHICS
JANUARY 2011

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Orthogonal projection (or
orthographic projection) is a
means of representing a
three-dimensional object in two
dimensions
. It is a form of parallel
projection, where all the projection
lines are orthogonal (relating to or
composed of right angles) to the
projection plane
.

With multiview orthogonal
projections, up to six pictures of an
object are produced. The views are
positioned relative to each other
according to either of two schemes:
first-angle or
third-angle projection
(used in Australia and New Zealand)
. In
each, the appearances of views may
be thought of as being projected
onto planes that form a 'glass box'
around the object
.

Although 6 different sides can be
drawn,
3 sides of a drawing give
enough information to make a 3D
object.
These views are known as
front view, top view and right side
view
.

FOR MORE ACTIVITIES FROM THE
PAST
especially ORTHO TO ISOMETRIC
and vice versa
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The sides of the 'glass
box' are the PROJECTION
PLANES
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