representation systems

1. ORTHOGRAPHIC
SYSTEM
THE POINT

2. The horizontal projection plane
turns 90º around the ground line to
meet the VP

3. REPRESENTATION OF A POINT
Two orthographic projections of one point
VP
HPHP
VP
Pp’
p
p
p’
distance
distance
height
height

4. r
r’
q’
s
p'
p
P
q
s' S
R
Q
II I
III IV HP
VP
p'
p
q
q'r
r'
s'
s
Projections of different points in different
quadrants

5. s
s'
q'
q
P
S
Q
II I
III IV PH
PV
p'
pq'
q
r'
r
s'
s
Orthographic projections of points placed
on the projection planes (HP and VP)
p
p'
R r
r'