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Orthographic system

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Art Department. Departamento de Dibujo.
Art Department. Departamento de Dibujo.

Gaspar Monge was a French mathematician and revolutionary who lived from 1746 to 1818. He invented descriptive geometry, which is the theoretical basis for technical drawing. During the French Revolution, Monge served as the Minister of the Marine and helped reform the French educational system by founding the École Polytechnique. Descriptive geometry uses projections and planes to represent three-dimensional objects in two dimensions.

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THE ORTHOGRAPHIC SYSTEM
(1746 –1818) WAS GASPAR MONGE A FRENCH MATHEMATICIAN, A REVOLUTIONARY, AND THE INVENTOR OF DESCRIPTIVE GEOMETRY, THE THEORETICAL BASIS ON WHICH TECHNICAL DRAWING IS BASED. DURING THE FRENCH REVOLUTION HE SERVED AS A MINISTER OF THE MARINE AND WAS INVOLVED IN THE REFORMATION OF THE FRENCH EDUCATIONAL SYSTEM, FOUNDING THE ÉCOLE POLYTECHNIQUE.
FIRST SECOND QUADRANT QUADRANT VERTICAL PLANE HORIZONTAL PLANE GROUND LINE FOURTH THIRD QUADRANT QUADRANT
REPRESENTATION OF AN OBJECT VERTICAL PROJECTION OBSERVER HORIZONTAL PROJECTION
Orthographic system
A´ A
²¹Â´# a´ A a´ a a
²¹Â´# LEVEL a´ DISTANCE A OR LEVEL HEIGHT LEVEL OR OR HEIGHT HEIGHT DISTANCE a´ a DISTANCE a
nts and straight lines stem. yed in Technical chnical Drawing ed about the e instruments. ey are drawing. s: e the task. instruments. graphic system. e accurate, neat uation criteria.)
´¡â€™ A ´¡â€™ ´¡â€™ A A
µþ’ B µþ’ µþ’ B B
°ä’ C °ä’ °ä’ C C
D’ D D’ D’ D D
E’ E E E’ E E
F’ F F’ F
´¡â€™ D’ °ä’ µþ’ D E’ F’ F A C E B
¸é’ R ³Õ’ ¸é’ V R R H’ H
³Õ’ ¸é’ H’ V R ³Õ’ H ¸é’ V R R H’ H
¸é’ R R ¸é’ ³Õ’ R V
³Õ’ ¸é’ V R R ¸é’ ³Õ’ R V
¸é’ R R ¸é’ R H’ H
¸é’ H’ R H R ¸é’ R H’ H
5.2 Drawing different types of straight line Object • To dra quadra • To use Materi • Graphi • 45º and • Ruler a Presen • This ac • The ta Studen • The stu proced handlin Evalua Assess usi 1. Correc 2. Proper 3. Accura 4. Turned (See Te
Orthographic system

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Orthographic system

  • 2. (1746 –1818) WAS GASPAR MONGE A FRENCH MATHEMATICIAN, A REVOLUTIONARY, AND THE INVENTOR OF DESCRIPTIVE GEOMETRY, THE THEORETICAL BASIS ON WHICH TECHNICAL DRAWING IS BASED. DURING THE FRENCH REVOLUTION HE SERVED AS A MINISTER OF THE MARINE AND WAS INVOLVED IN THE REFORMATION OF THE FRENCH EDUCATIONAL SYSTEM, FOUNDING THE ÉCOLE POLYTECHNIQUE.
  • 3. FIRST SECOND QUADRANT QUADRANT VERTICAL PLANE HORIZONTAL PLANE GROUND LINE FOURTH THIRD QUADRANT QUADRANT
  • 4. REPRESENTATION OF AN OBJECT VERTICAL PROJECTION OBSERVER HORIZONTAL PROJECTION
  • 7. ²¹Â´# a´ A a´ a a
  • 8. ²¹Â´# LEVEL a´ DISTANCE A OR LEVEL HEIGHT LEVEL OR OR HEIGHT HEIGHT DISTANCE a´ a DISTANCE a
  • 9. nts and straight lines stem. yed in Technical chnical Drawing ed about the e instruments. ey are drawing. s: e the task. instruments. graphic system. e accurate, neat uation criteria.)
  • 10. ´¡â€™ A ´¡â€™ ´¡â€™ A A
  • 11. µþ’ B µþ’ µþ’ B B
  • 12. °ä’ C °ä’ °ä’ C C
  • 13. D’ D D’ D’ D D
  • 14. E’ E E E’ E E
  • 15. F’ F F’ F
  • 16. ´¡â€™ D’ °ä’ µþ’ D E’ F’ F A C E B
  • 17. ¸é’ R ³Õ’ ¸é’ V R R H’ H
  • 18. ³Õ’ ¸é’ H’ V R ³Õ’ H ¸é’ V R R H’ H
  • 19. ¸é’ R R ¸é’ ³Õ’ R V
  • 20. ³Õ’ ¸é’ V R R ¸é’ ³Õ’ R V
  • 21. ¸é’ R R ¸é’ R H’ H
  • 22. ¸é’ H’ R H R ¸é’ R H’ H
  • 23. 5.2 Drawing different types of straight line Object • To dra quadra • To use Materi • Graphi • 45º and • Ruler a Presen • This ac • The ta Studen • The stu proced handlin Evalua Assess usi 1. Correc 2. Proper 3. Accura 4. Turned (See Te