In Engineering drawings Isometric
projection is a method for visually representing three-dimensional objects in
two dimensions. An isometric view of an object can be obtained by choosing the
viewing direction such that the angles between the projections of the x, y, and z axes are all the same, or 120°.
Orthographic views are
two-dimensional views of
three-dimensional objects. Orthographic
views are created
by projecting a view of an object
onto a plane which is usually positioned so that it is parallel to one of the
planes of the object.
Orthographic projection and Isometric projection are two ways of
representing the same object.
ISOMETRIC PROJECTON:
Isometric projection of an object is how the object looks to naked eye when
seen from a distance. When seen from a distance the object doesn't look as it
actually is, it looks smaller and so is the isometric projection of the object.
ORTHOGRAPHIC PROJECTION:
Orthographic projection gives the actual measurements of the object. It can
only be understood by people who know engineering drawing. Imagine that the
object is floating in air. Now you show your torch towards the object on each
side, the shadow caught on the wall is orthographic view of that side. This is
used for manufacturing purposes. Although one orthographic view in not
enough to know the actual shape of the object.
