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ORTHOGRAPHIC
SYSTEMTHE PLANE
OBLIQUE PLANE
VP
HPHP
VP
a
a’
aa
a’
VERTICAL PROJECTING PLANE
(perpendicular to VP)
a
VP
HPHP
VP
a’
aa
a’
a
VP
HPHP
VP
a’
a a
a’
HORIZONTAL PROJECTING PLANE
(perpendicular to HP)
HORIZONTAL PLANE
(parallel to HP)
a
VP
HPHP
VP
a’
a’
a
VP
HPHP
VP
aa
VERTICAL PLANE
(parallel to VP)
PLANE PARALLEL TO THE GROUND LINE
a
VP
HPHP
VP
a’
aa
a’
