DIMENSIONS APPEARING IN THE VIEWS
The dimensions which appear in three dimensional photographs or drawings are
generally not the actual dimensions instead these depend upon the angle of vision. An
edge appears in true length when it is parallel to the plane of projection and it
appears as a point when it is perpendicular to the plane. The edge appears shorter in
length than actual when it is inclined to the plane of
Fig. 3.2 Views of a Diagonal Scale From Different Angles.
projection. For example, if we look at a diagonal scale from different angles (to form two
dimensional views because of its small thickness), its length will vary as shown in Fig. 3.2.
