What is 1st angle orthographic projection?

In the first angle projection method, the orthographic view is projected on a plane located beyond the object and the observer is on the left side of the object and projects the side view on a plane beyond the object.

What angle is used in orthographic projection?

Orthographic projection uses multiple views of an object, from points of view rotated about the objects centre through increments of 90 degrees. In first angle projection, each view of the object is projected in the direction (sense) of sight of the object.

How is first angle projection done?

In the first angle projection, the object is placed in the 1st quadrant. The object is positioned at the front of a vertical plane and top of the horizontal plane. First angle projection is widely used in India and European countries. The object is placed between the observer and projection planes.

Why is first angle projection used?

In India, we generally use 1st angle projection. Generally, we view a body as if it is in the first quadrant. So, just for the simplicity of drawing the orthographic views, we prefer first angle projection.

What is first angle projection example?

The first drawing is the front view (drawn looking straight at the front of the L-shape), the second is a drawing of the L-shape seen from the side (known as side view) and last of all a drawing from above known as a plan view.

How do you draw an orthographic projection?

Steps used to create an orthographic projection

  1. Choose a front view.
  2. Decide how many views are needed to completely describe the object.
  3. Draw the visible features of the front view.
  4. Draw projectors off of the front view horizontally and vertically in order to create the boundaries for the top and right side views.

What is the first orthographic drawing?

First Angle Orthographic Projection. Orthographic Projection is a way of drawing an 3D object from different directions. Usually a front, side and plan view are drawn so that a person looking at the drawing can see all the important sides.

What is 3rd angle orthographic projection?

3rd Angle project is where the 3D object is seen to be in the 3rd quadrant. It is positioned below and behind the viewing planes, the planes are transparent, and each view is pulled onto the plane closest to it. The front plane of projection is seen to be between the observer and the object.

What is orthographic and isometric projection?

Isometric: a method of representing three-dimensional objects on a flat surface by means of a drawing that shows three planes of the object. Orthographic: a method for representing a three-dimensional object by means of several views from various planes.

What do you mean by orthographic projection?

orthographic projection, common method of representing three-dimensional objects, usually by three two-dimensional drawings in each of which the object is viewed along parallel lines that are perpendicular to the plane of the drawing.