PARALINE DRAWINGS
Whileorthographic projections describe a three-dimensional
subject through a series of distinct but related two-dimensional
views, para line drawings convey the three-dimensional nature of a
form or construction ina single pictorial view. Properly speaking,
any orthographic projection is apa ralinedrawing. However, we use
the term "para line drawing" to refer specifically to those single
pictorial views described below.
Types of Paroline Drawing
-- .. - • Axonometric projections can produce isometric, dimetric,
or trimetric views.
--·-·----·-· Oblique projections can result in plan obliques or elevation
obliques.
• Unfortunately, CAD and modeling programs do not use these
terms for the different types of paraline drawings in a
consistent manner.
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Pictorial Characteristics of Poroline D
rawings
l
L_ _ .. Para line drawings are always aerial or worm's·eye views.
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Parallel lines in the subject remain parallel in the drawing.
All axial lines-those lines parallel to the major X-, Y-, and zaxes-are scalable. Conversely, nonaxiallines are never
scalable.
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I ARCHITECTURAL GRAPHICS