Orthographic Projection – GCSE Design and Technology Eduqas Revision

Basics of Orthographic Projection

Refer to orthographic projection as a method used to represent three-dimensional objects on a two-dimensional surface.
Highlight the key feature of orthographic projection: it keeps the size and shape of the object constant and undistorted.
Recognise orthographic projection as a vital tool for engineers and designers, providing an accurate and precise way to depict objects and structures.

Discern the three principal views used in orthographic projection: the front view, the top view, and the right side view.
Remember that each view of an object is a 2D representation on one of three orthographic planes (horizontal, frontal, and profile).
Understand that the front view depicts the width and height of the object, while the top view shows the width and depth. The right side view illustrates the depth and height of the object.

Remember that each separate view is created by looking straight on to one face, edge, or surface.
Underline the need to place the three principal views in relation to each other correctly. The top view is placed above the front view, while the right view is placed on the right side of the front view.
Draw attention to the fact that orthographic projection eliminates the distortion that comes with perspective drawing. This makes it ideal for technical and engineering drawings where precision is vital.

Understand that in computer-aided design (CAD), orthographic projection is automatic and can be done easily.
Recognise that CAD programs allow the designer to draw the object in 3D and then generate the orthodox projections automatically.

Avoid the common pitfall of not aligning the different views correctly.
Ensure to use precise measurements while drafting the object; otherwise, orthographic projection will not accurately represent the object.
Always double-check the drawing to ascertain there are no missing or distorted parts.