MEASURING POINT METHOD
The following is a method for constructing atwo-point
perspective grid utilizing measuring points. As with the
construction of a one-point perspective, you should first
establish the observer's point of view. Determine what you
wish to illustrate. Look toward the most significant areas
and try to visualize from your plan drawing what will be
seenintheforeground, middleground, and background.
Review theperspective variables on pages 95- 98.
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Plan Setup
• At aconvenient scale, construct a plan diagram of the
perspective setup to determine thedesired angle of
view.
Lay out the major baselines of the space.
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108 / ARCHITECTURAL GRAPHICS
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• Establish the station point (SP) and the observer's
central axis of vision (CAV), being careful that most of
what you wish to illustrate lies within a60° cone of
vision.
• Locate the picture plane (PP) perpendicular to CAV. It is
usually convenient to have PP intersect a major vertical
element of the space so that it can be used as a vertical
measuring line (VML).
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--- - • Locate theleft and right vanish ing points (VPL and
VPR). Remember that the vanishing point for any set of
parallel lines is that point at wh ich a line drawn from SP,
parallel to the set, intersects PP.