2004

554 | Chapter 20 Dimensions and Tolerances
The definition points for each type of dimension are indicated in the follow-
ing illustrations. The middle point of the dimension text is a definition point
for all dimension types.
If no angle vertex is shown, AutoCAD places definition points at the ends of
the lines that form the angle. In the two-line angular example, AutoCAD
places a definition point at the center point of the dimensioned arc.
Note Definition points are drawn on a special layer named DEFPOINTS, which
is not plotted.
Diameter: selection point and
opposite point
Ordinate: feature
location and leader
endpoint
Radius: selection
point and center
Linear: extension line origins and
intersection of first extension line
and dimension line
Three-Point Angular: angle
vertex, extension line origins,
and dimension line arc
Two-Line Angular: extension line
origins and dimension line arc