What is the difference between Orthographic Drawing and Isometric Drawing?

Answer 1

one is 2d the other is 3d

Answer 2

orthographics means line is perpendicular to the view plane,while oblique means line is not exactly perpendicular to the view plane.

Answer 3

Orthographic drawings are typically two dimensional views of an object. For instance, if you were designing a table, you would draw a top view, side view and a bottom view. Should these three views not fully explain the design of the table other views would need to be drawn. When drawing an perspective view in an orthographic manner, you would utilize a 45 degree triangle for the lines that extend back or forward from the vertical lines. This type of perspective is not a true perspective because you can measure the true length of all the details shown.

An isometric drawing is meant to depict a 3D image of an object in what appears to be a perspective view. However, similar to an orthographic perspective, all of the lines in an isometric drawing can be measured to their true length. What makes it different from an orthographic perspective is that its angled lines are drawn at 30 or 60 degrees or divisions of them. Drawing this by hand you would use a 30/60/90 triangle.

In either case, both types of perspectives can be accurately measured with a ruler in order to know the objects measurements.

These principles are usually taught in a drafting class, but may be taught in advanced art as well. Orthographic views may be drawn out on a page to show top, front and side views of an isometric drawing that is also drawn on the page as well. This is a basic drafting design setup.