# Isometric Projection – its 2 [Methods, Advantages and Examples]

## ISOMETRIC PROJECTION

Isometric projection in technical and engineering drawings is a method of visually representing three-dimensional objects in two-dimensions. Isometric projection is a method of graphic representation and the technique is intended to combine the illusion of depth.

The isometric projection is one class of orthographic projections and if the plane is oriented an isometric projection results so that it makes equal angles. ### Methods Of Drawing Isometric Projection or Drawing:

There are the following two methods as given below:

1. Box-Method
2. Off-Set Method

#### Box Method:

The box method is easy and intelligible and for the drawing it takes much time.

The maximum length, height and breadth are noted in this method and by these dimensions a box is constructed. According to isometric projection these dimensions of the box are represented and with the horizontal line these make angles of 30, 30 and 90 degrees and all parts of the object are shown after this. #### Off-Set Method: ### Isometric Scale:

To form an isometric projection the isometric scale is prepared and the actual dimensions are transformed into isometric dimensions with the help of this scale.

### Method of Drawing Isometric Scale:

1. Draw two lines at 45° and 30° after drawing a horizontal line.
2. According to the actual scale put marks on 45° line.
3. To represent the isometric scale draw perpendicular offsets from 45° line up to 30° line.

So, this is the way from which the isometric scale is prepared.

### Isometric Lines, Circles, & Curves:

The points of intersection of the corner of the bigger angle of the isometric square and the sides confronting it and by drawings arc the circle is completed.

### Difference between Isometric Drawing and Isometric Projection:

The isometric drawing and isometric projection drawing method is the same but all the dimensions in isometric drawing are actual while the isometric scale is to be used in the isometric projection.

1. This projection doesn’t need multiple views.
2. Illustrates the 3D nature of the object.
3. To scale along principal axes measurement can be made.
4. In terms of measurement it provides accuracy.
5. It is easy to layout and measure.

1. It creates a distorted appearance by lack of .
2. It is more useful for rectangular than curved shapes.
3. It distorts shape and depth.
4. Instead of the real view it only provides a 2D view.

### Examples: 