Difference between Perspective, Isometric, Oblique and Orthographic Drawing.

Perspective Drawing

Perspective Drawing is used by artists to give the illusion of space and distance.A perspective drawing is a form of pictorial drawing.A perspective drawing utilizes either one, two or three points to where the receding lines will vanish. These vanishing points are placed along a horizontal line called a horizon line. No longer will the receding lines be parallel to each other as in oblique or isometric drawings.

Source:http://www.artyfactory.com/perspective_drawing/perspective_1.htm

http://www.bgfl.org/bgfl/custom/resources_ftp/client_ftp/ks1/art/perspective/index.htm

Isometric Drawing

If you have taken New South Wales Maths Assessments

or 2009's PSLE Math paper,Isometric drawings will not be

new to you. Isometric drawings are usually drawn with

rulers to ensure accuracy.In isometric projection,all vertical

lines on an object remain vertical while the horizontal lines

are 30 degrees horizontal.

Sources:http://www.bbc.co.uk/schools/gcsebitesize/design/graphics/drawingformalrev1.shtml

Oblique Drawing

Oblique drawings have a set of 45° lines,a set of horizontal lines and a set of vertical lines.As long as basic rules are followed, oblique projection is quite easy to master and easy to draw quickly.

Sources:http://www.technologystudent.com/designpro/oblique1.htm

Orthographic Drawing

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. Orthographic drawings are useful especially when a design has been developed to a stage whereby it is almost ready to manufacture.

Sources:https://rdl.train.army.mil/soldierPortal/atia/adlsc/view/public/9726-1/accp/en0113/pe1.htm