PR 226667 Line profile should be Curve Profile

huangyhg

Line profile should be Curve Profile

<< Scott Worden  --  09/01/04  12:20:01>>
I believe the 2 types of profile dimensions are Surface Profile and Curve Profile.  For some reason, we are using Line Profile instead of Curve Profile.  This should be changed.

There are at least 4 instances of this:  Dimension toolbar tool tip, Insert | Dimension | Profile | (Line...), (Line) Profile dialog, Edit Window dimension text.
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<< Scott Worden  --  09/10/04  14:10:25>>
I guess I was expecting ISO and ASME to use the mathematical or geometrical definition of a line and not the literal definition.
In math:
Line = a straight curve, a series of point extending infinitely in one direction
Curve = a connected set of points, a nonstraight line.
- thus, in math, a line is a very specific curve.  Whereas curves are a superset that include lines.  So to mathematicians, profile of a line is straightness but straightness cannot be applied to a curve.
Unfortunately, dictionaries define a line as being either straight or curved and apparently ASME and ISO politicians chose dictionaries over mathematics.  Go figure.
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<< Changes made by Scott Worden -- 09/10/04  14:14:48>>
Status:  RESOLVED to CLOSED
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<< Bret Naylor  --  09/10/04  09:33:12>>
Reviewed.
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<< Changes made by Bret Naylor -- 09/10/04  09:33:20>>
Action:  Bret Naylor to Scott Worden, Status:  REVIEW to RESOLVED
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<< David Petrizze  --  09/09/04  00:04:36>>
Reviewed.  This should remain as Profile of a Line.
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<< Changes made by David Petrizze -- 09/09/04  00:04:44>>
Action:  David Petrizze to Bret Naylor
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<< Wade Burton  --  09/07/04  21:25:12>>
Reviewed.  
The ISO standard of 1983 which I have officially calls them "rofile of any line" and "rofile of any surface" in its tables, chapters, and table of contents.
ASME Y14.5 1994 section 6.5.2 calls this (a) "rofile of a Surface" and (b) "rofile of a Line".  Everywhere else I see a figure with this or the icon, it calls it the same thing.
I highly recommend that we leave this as it is.
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<< Changes made by Wade Burton -- 09/07/04  21:25:28>>
Action:  Wade Burton to David Petrizze
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<< Scott Worden  --  09/07/04  16:19:23>>
I believe Y14.5 has a table with the symbols and names.  Whatever is in the table is what we should use.  Dave has the office copy so I can't look it up.  This should be double checked with the ISO standard.
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<< Changes made by Don Turcotte -- 09/07/04  15:27:44>>
Action:  Don Turcotte to Wade Burton, Status:  OPEN to REVIEW
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<< Don Turcotte  --  09/07/04  15:27:37>>
Wade,
I believe Surface Profile and Line Profile are correct.  Surfaces can be curved or flat and imply a 3D profile; lines can be curved or straight and imply a 2D profile.  I have not seen anything in the Y14.5 standard that talks about this.  I believe we use this terminology simply to distinguish 2D versus 3D.
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<< Tim Wernicke  --  09/01/04  16:47:08>>
I think that this has been debated several times but I don't recall the final decision for naming this.
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<< Changes made by Tim Wernicke -- 09/01/04  16:47:09>>
Category:  dimensions to GD&T, Action:  Wade Burton to Don Turcotte, Assigned:  Wade Burton to Don Turcotte, Priority:  to Medium
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