LOCATION OF THE MEASUREMENT POINTS
With the two measurement points we are able to work the oblique perspective in millimeters, without drawing a plane in squares to find the desired width and depth.
See the figure below (figure nº 39). At the right of the plane the support line changed into the width measurement line and at the left in depth measurement line.
The measurement points MP1 and MP2 can only be located on the horizon line after the construction of the horizontal plane.
Mark the same dimension referring to the square on a shortening (scorcio) scale on the measurement lines.
With the line leaving from the measurement line to the vertex of the square, mark the measurement points MP1 and MP2 on the horizon line.