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Isometric & Orthographic Projections - Coggle Diagram
Isometric & Orthographic Projections
Isometric Projection
3D designs can be shown using axonometric projection, with isometric drawing being the most common. It uses three axes spaced 120° apart, showing edges at equal angles and true lengths.
In isometric drawing, the vertical lines will also stay vertical.
Orthographic Drawings
are flat, 2D views of an object from different angles, like front, top, and side.
Orthographic projections use 2D drawings to represent and define a 3D model.
First and Third Angle Projections
Methods to show 3D objects in 2D drawings. In first angle, views are projected opposite the object; in third angle, views are projected on the same side. Both are key for engineering drawings.
Types of Lines in Orthographic Drawings
Visible Lines
Solid, thick lines showing the parts of an object seen in a view,
Clearly conveying its shape and details in engineering drawings.
Hidden Lines
dashed lines showing features not visible in a view
revealing the object's internal or hidden parts.
Center Lines
Indicate feature centers
Aid in accurate positioning
Ensure proper alignment
Mark the centers of holes, cylinders, and symmetrical features using alternating long and short dashes.
