TONAL VALUES IN ARCHITECTURAL DRAWINGS
The drawings on this and thefollowing seven pages
illustrate how we can use tonal values to enhance spatial
depth and focus attention in various types of architectural
drawing.
• We use tonal values insite plan drawings to define the
relationship between the form of abuilding and its spatial
context. These two drawings of t hePiazza San Marco in
Venice illustrate how the tonal contrast can be achieved
either by rendering the building as a dark figure against
alight background or by reversing the figure-ground
relationship and rendering the tonal values of the site.
• See also the site plans illustrated on page 53.
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136 I ARCHITECTURAL GRAPHICS