1.2 Drawing Types

Two Kinds of Technical Drawings

Based on how the object is shown in the drawing (2 dimensional or looking 3 dimensional)

1. Orthographic Projection - perpendicular to the surface (no perspective)

2. Pictorial Drawing - looks 3-dimensional (shows depth)

1. Orthographic Projection - perpendicular to the surface (no perspective) 2D view(s)

This kind of drawing creates two dimensional images of objects. To show more than two dimension of the object, you have to provide more than one view of the object. The front view of the object may show the height and width. To show the depth of that object you will need to add a top view showing width and depth, or a side view showing height and depth. Several views of the same object is called a "multiview drawing". When more than one view of the same object are shown, the views have to line up with each other. This means that features of the object that appear in both views will line up with each other vertically or horizontally on the page.

One View Drawing shows only one side of an object