ORTHOGRAPHIC

SYSTEMTHE POINT

The horizontal projection plane

turns 90º around the ground line to

meet the VP

REPRESENTATION OF A POINT

Two orthographic projections of one point

VP

HPHP

VP

Pp’

p

p

p’

distance

dis

tan

ce

he

igh

t

he

igh

t

r

r’

q’

s

p'

p

P

q

s' SR

Q

II I

III IV HP

VP

p'

p

q

q'r

r'

s'

s

Projections of different points in different

quadrants

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 rr'