Expert: Bill DeShawn - 8/31/2006

Question
Forgive me for troubling you again but I have another multiple choice question from Ireland.
It is a Level 3 City and Guilds question and I am in severe disagreement with a colleague over the correct answer. You may not feel such question is appropriate but here it is.
Which of the following best describes a Local Coordinate System
(a) A pair of coordinate points which define the lower left and upper right corners of the drawing boundary
(b) A series of coordinate points stored as variables for later use in the drawing.
(c) A coordinate system whose origin is located anywhere in three dimensional space.
(d) A means of logically grouping drawing entities so that visibility can be controlled.

Can only be (a) or (c) and (a) the simple answer is my pick

Regards
Padraic

Answer
Until today, I have only heard of "user coordinate system" and "world coordinate system".  "Local coordinate" system is not something that AutoCAD references, or at least if it does, it isn't called that.  So, I looked it up.  It appears to me that if you put a box out in space, (at any 3-D place in your drawing), then you could declare one corner of the box to be 0,0,0 in it's own coordinate system.  So, it would be to say that a local coordinate system is an object coordinate system.  Since none of your answers references an object, I would have to disagree with all your answers.

:)

Have a good day, Patrick (Padraic).

(My maternal grandfather is William Duggan.)

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