Isometric: Isometric Drawing and its characteristic It is one of the forms of projection used in technical drawing like REVIT MEP Design that has the advantage of allowing scale representation. Isometric determines a visualization direction in which the projection of the coordinate axes x, y, z make up the same angle, that is, 120º from each other. The objects are shown with a rotation of the viewpoint of 45º in the three main directions (x, y, and z).
This perspective can be visualized considering the point of view located at the top vertex of a cubic room, facing the opposite vertex. The x and y axes are the straight lines of the encounter with the floor, and the z axis, the vertical, the encounter of the walls. In the drawing, the axes (and their parallel lines), maintain 120º between them.
Within the set of axonometric or cylindrical projections, there are other types of perspective. Which differ by the position of the main axes, and the use of different reduction coefficients to compensate for visual distortions.
Isometric Drawing: Isometric refers to that three-dimensional drawing that has been made with the inclined axes forming an angle of 30 ° with the horizontal. One of the great advantages of P&ID Diagram is that the drawing of any model can be made without using any special scale, since the lines parallel to the axes are taken in their true magnitude. Thus, for example, when the cube is drawn in an isometric way, it has all its edges of equal measure.
A widely used variety of the Isometric Perspective is the Isometric Drawing. In the Isometric one the coefficient of reduction of the dimensions equivalent to approximately 0.816, that is