An orthographic drawing is one that uses a sort of perspective that does not portray an object the way it would look in a natural space. It shows each side of the object as flat and parallel to the "picture plane." It's not too unlike cubism. (Braque and Picasso explored drawing people and object by showing all sides at once.)
This is used in order to give accurate engineering/mathematical dimensions. It is used for the fabrication of mechanical parts, furniture...
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I think it means a drawing from multiple positions for example front, back side.
orthographic sketch nothing but it will be always 90 angle lines or curves, and you are representation of sketch it will be perpendicular to the drawing sheet or plane.
All drawing is a form of projection in itself. If you mean how do you project orthographic shapes to trace then the best way would be to place a light 180 degrees behind the object you wanted to draw. This would cast a silhouette (which is essentially what an orthographic drawing is) that you can trace.
Orthographic Projection/Drawing is nothing but representing a 3-Dimensional Object into 2-Dimensional drawing. it is a form of parallel projection where all the projections are orthogonal to the projection plane resulting in every plane of the scene appearing in viewing plane so, Another name for Orthographic Drawing is "Multview Drawing"
Amagine looking at a cube from an angle. Now to make that orthographic amagine looking at it straight. A cube would just be a square.
butty
nothing!