Pictorial sketching types

The Six Sides of 3-D Objects No matter the type of pictorial sketch, every object is defined by six sides or views (also referred to as planes). This allows the viewer to understand the orientation and the relations of each side to the other sides. The six planes are front, right side, left side, top, back (or rear), and bottom. The front view is the anchor view all other views are established by identifying the front view first. But any pictorial sketch, no matter what the type, will only show three sides. Figure 5-5a demonstrates the relationship of each view (side) to the front view. The relationship of views also helps demonstrate the development of 2-D drawings, which only show two dimensions (see Figure 5-5b). 

Pictorial representation is divided into three groups. Two of these groups are demonstrated in this chapter. The three types of pictorial sketches are axonometric (meaning to measure along the axis), oblique, and perspective. Of the axonometric family of drawings, isometric sketching is the one used here (see Figure 5-6). 

Detailed Sketch This type of sketch is when a designer or an engineer wants to further develop a thumbnail sketch. A detailed sketch may be a pictorial or two-dimensional (2-D) sketch that includes dimensions, annotations, and symbols. The sketch may also include shading or shadows for effect (see Figure 4-8b). 

D) pictorial view such as an isometric or perspective drawing. You will learn how to develop these types of drawings in Chapter 5. These sketches are used by engineers and designers to make formal presentations (see Figure 4-8c). 

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