Difference between Perspective, Isometric, Oblique and Orthographic Drawing

Oblique: Oblique projection is a method of drawing objects in 3 dimensions. It is a type of drawing involving a combination of a flat, orthographic front with depth lines receding at a selected angle, usually at 45 degrees.

Isometric: Isometric drawing is way of presenting designs/drawings in three dimensions. Designs are always drawn at 30 degrees in isometric projection.

Orthographic: Orthographic drawing is a way of drawing a three dimensional object. Normally the object is drawn as three separate, related views - Front View, Side View and Plan View. A drawing that communicates the shape and size of an object through a series of related two-dimensional views.

Perspective: A form of pictorial drawing in which vanishing points are used to provide the depth and distortion that is seen with the human eye. Perspective drawings can be drawn using one, two, and three vanishing points.