What are the 3 main views of an orthographic drawing?
A drawing can have any combination of views but the three most common views are: front view. right side view, and. top view.
What are the different types of projections?
This group of map projections can be classified into three types: Gnomonic projection, Stereographic projection and Orthographic projection.
- Gnomonic projection. The Gnomonic projection has its origin of light at the center of the globe.
- Stereographic projection.
- Orthographic projection.
What are the types of orthographic projections?
Three sub-types of orthographic projection are isometric projection, dimetric projection, and trimetric projection, depending on the exact angle at which the view deviates from the orthogonal.
Why do we use 1st and 3rd angle projection?
We consider that horizontal plane rotates in clockwise direction after having projection on it. that’s why we use 1st angle and 3rd angle projection. because only in this two quadrants we will get the both views after clockwise rotation of horizontal plane.
How many types of angle projections are there?
There are two types of drawing in orthographic , First Angle and Third Angle. They differ only in the position of the plan, front and side views….Different between 1st angle projection and 3rd angle projection in drawing.
| First Angle Projection | Third Angle Projection |
|---|---|
| Object is located between observer and plane of projection | Object is located between observer and object |
What is the difference between orthographic projection 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 is apparent shape?
Sectional view : The projection of the section along with the remaining portion of the object is called a Sectional View. Projection on the other plane is called apparent section. 2. True shape of the section : Projection of the section on a plane parallel to the section plane will show the true shape of the section.