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Isometric & Orthographic Projections - Coggle Diagram
Isometric & Orthographic Projections
Isometric drawing
Isometric means equal measure
constructed on 3 axes that divide the circle equally. They are 120° from each other.
Orthographic Projections
A simple way of representing engineering design drawings
a collection of 2D drawings used to define a 3D model.
types of lines in orthographic drawings
Visible Lines
represent features of an object that are visible in a particular view.
typically drawn as solid, thick lines to ensure they stand out clearly on the drawing.
essential for conveying the shape and details of the object being depicted. visible lines help to provide a clear and accurate representation of the object's geometry.
Hidden Lines
not visible in a particular view. These lines are usually drawn as dashed lines to differentiate them from visible lines.
convey the internal or hidden features of an object,
Center Line
indicate the centers of holes, cylinders, and other symmetrical features
drawn as alternating long and short dashes.
first and third angle projections are methods used to represent three-dimensional objects in two dimensions.
First angle
the object is placed between the observer and the plane of projection
resulting in the views being projected onto the opposite side of the plane.
is commonly used in European countries.
The orthographic projections are on the opposite side.
Third angle
the plane of projection is between the observer and the object, causing the views to be projected onto the same side of the plane.
commonly used in U.S.
The orthographic projections are on the same side.