representation systems

1. ORTHOGRAPHIC
SYSTEM
THE PLANE

2. OBLIQUE PLANE
VP
HPHP
VP
a
a’
a
a
a’

3. VERTICAL PROJECTING PLANE
(perpendicular to VP)
a
VP
HPHP
VP
a’
a
a
a’

4. a
VP
HPHP
VP
a’
a a
a’
HORIZONTAL PROJECTING PLANE
(perpendicular to HP)

5. HORIZONTAL PLANE
(parallel to HP)
a
VP
HPHP
VP
a’
a’

6. a
VP
HPHP
VP
a
a
VERTICAL PLANE
(parallel to VP)

7. PLANE PARALLEL TO THE GROUND LINE
a
VP
HPHP
VP
a’
a
a
a’