2012

Datum Identifier
Creates a datum-identifying symbol consisting of a reference letter. A datum
is a theoretically exact geometric reference from which you can establish the
location and tolerance zones of other features. A point, line, plane, cylinder,
or other geometry can serve as a datum.
Symbol Dialog Box
Quick Reference
See also:
■ Overview of Geometric Tolerances
Displays the geometric characteristic symbols for location, orientation, form,
profile, and runout.
Summary
The symbol is inserted into the Sym text box in the Geometric Tolerance
dialog box
. The following table describes the symbols.
Geometric characteristic symbols
TypeCharacteristicSymbol
LocationPosition
1248 | Chapter 20 T Commands