In machining, 2.5D refers to a surface which is a projection of a plane into 3rd dimension – although the object is 3-dimensional, there are no overhanging elements possible. Objects of this type are often represented as a contour map that gives the height (i.e., thickness or depth) of the object at each point.[1] A 2.5D image is a simplified three-dimensional ((x, y, z) Cartesian coordinates system) surface representation that contains at most one depth (z) value for every point in the (x, y) plane. All features of the part will be visible from one view meaning that it can written with simple codes and accessible technology. It also means the machining portion of the task can be completed without the need of manually removing it and re-centering the part. This leads to increased efficiency and affordability for manufacturers. 2.5 axis machining is also used in education to build an understanding of the concepts and gain experience.