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What is isometric sketching?

Updated: 8/10/2023
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13y ago

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Isometric view is a two dimensional representation of a three dimensional object or space. It is often used in technical drawings, such as architectural, engineering and patent drawings. It is similar to perspective view, yet isometric drawings do not converge at a vanishing point. Since perspective is an optical illusion that skews the lines and dimensions of an object, it cannot be used to convey technical data (i.e., the exact size and measurements of an object, surface or space). In isometric drawings, however, the lines remain parallel and proportionate to one another. It conveys an illusion of three dimensional space without modifying the dimensions and scale of an object. Therefore, it can be used as a scaled technical drawing.

Visually, an isometric view consists of two elevations (A and B) that are adjoined at one side (the y axis) and a plan view (C) that is joined at the top or bottom of elevations A and B. All vertical lines are drawn at an angle that is perpendicular to an imaginary horizon line (the x axis). All horizontal lines, however, are rotated along the y axis at a constant angle (usually 30 or 45 degrees). If the horizontal lines in elevation A are rotated to 30 degrees (taken from the x axis), then the inner angle will be 60 degrees (taken from the y axis). On the opposite side of the y axis, elevation B is mirrored at the same angle (30 degree outer and 60 degree inner). The sum of the inner angles (60 + 60) then forms the angle of the adjoining plan C (120 degrees). For a 45 degree isometric, the inner angles of elevations A and B are each 45 degrees and the adjoining angle of plan C is 90 degrees.

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12y ago
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13y ago

isometric drawing / sketching is the same thing ;

is where an object is seen in almost 3D profile, from each edge .

so a view would be drawn showing the front (1) ;

the sloping edge of 1 side (2)

and the top edge maybe , (3)

but not in perspective view .

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12y ago

Isometric view is a two dimensional representation of a three dimensional object or space. It is often used in technical drawings, such as architectural, engineering and patent drawings. It is similar to perspective view, yet isometric drawings do not converge at a vanishing point. Since perspective is an optical illusion that skews the lines and dimensions of an object, it cannot be used to convey technical data (i.e., the exact size and measurements of an object, surface or space). In isometric drawings, however, the lines remain parallel and proportionate to one another. It conveys an illusion of three dimensional space without modifying the dimensions and scale of an object. Therefore, it can be used as a scaled technical drawing.

Visually, an isometric view consists of two elevations (A and B) that are adjoined at one side (the y axis) and a plan view (C) that is joined at the top or bottom of elevations A and B. All vertical lines are drawn at an angle that is perpendicular to an imaginary horizon line (the x axis). All horizontal lines, however, are rotated along the y axis at a constant angle (usually 30 or 45 degrees). If the horizontal lines in elevation A are rotated to 30 degrees (taken from the x axis), then the inner angle will be 60 degrees (taken from the y axis). On the opposite side of the y axis, elevation B is mirrored at the same angle (30 degree outer and 60 degree inner). The sum of the inner angles (60 + 60) then forms the angle of the adjoining plan C (120 degrees). For a 45 degree isometric, the inner angles of elevations A and B are each 45 degrees and the adjoining angle of plan C is 90 degrees.

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11y ago
  • A form of pictorial sketch in which all three drawing axes form equal angles of 120 degrees with the plane of projection.
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14y ago

A sketch that is equal on both sides.

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