PLANS
If we enclose an object within atransparent picture-plane
box, we can name the principal picture planes and the
images projected orthographica lly onto these planes. Each
orthographic view represents a different orientation and a
particular vantagepoint from whichto view t heobject.
Each plays a specific role in the development and
commu nication of adesig n.
l
Plans are drawings of orthographic projection on a
s
horizontal picture plane. The represent a view looking
y
down on an ob
ject, bu ilding, or scene from above.
• In depicting width and length but not height, plans
emphasizehorizontal arrangemen and patterns of
ts
funct ion, form, or space. N especially that plans are
ote
unable to provide precise informat ion ab the vertical
out
dimensions offorms and spaces.
• All planes parallel to the pictureplane maintain their
true size shape, and proportions. Conversely, all planes
,
that are curved or oblique to the horizontal plane of
project ionare foreshortened.
• In architectural drawing, there are distinct types of plan
views for depicting v
arious horizon projections of a
tal
building or site: floor plans, reflected ceiling plans, site
plans, and roof plans.
38 I ARCHITECTURAL GRAPHICS