SPATIAL DEPTH CUES
In orthographic projection, the project ed size of aline
or plane remains the same regardless of its distance
from the picture plane. To convey a sense of depth,
therefore. we must utilize ahierarchy of line weights or
a range of tonal values. The technique we use depends
onthe scale of the building elevation, the drawing
medium, and thetechnique for depicting the texture
and pattern of materials.
EB
EE
In a line drawing, discernible differences inline weight
can aid in suggestingthe relative depth of planes.
...__--~~§§~L_, · This is abuilding elevationdrawn with asingleline
weight.
• This drawing uses a hierarchy of line weights to
convey depth.
- - - Theheaviest line weight defines the section cut
through the ground mass line infront of thebuilding.
Extending this ground line beyond the building serves
to describe the topographical nat ure of the setting.
Thenext heaviest line weight profiles the planes
closest to the plane of projection.
..
~ bJJJ:U~~~gr~~~~~~§{
-
1::;::~~~~
70 /ARCHITECTURAL GRAPHICS
Progressively th inner and lighter lines indicate the
increasing distance of elements from the pict ure
plane.
• The lightest line weights represent surface lines.
These lines do not signify any change inform; they
simply represent the visual pattern or textureof
surfaces.