Geometric specifications
ISO GPS specification. ST - Requirements applied to micro and macrogeometry of products

There are four main families of geometric specifications that are defined by the standard. ISO 1101  :

• geometric form specifications;

• geometric orientation specifications;

• geometric position specifications;

• the geometric specifications for flapping.

A geometric specification describes a requirement by defining:

• the toleranced element (the geometric element to be observed);

• the tolerance zone, or more precisely an evaluation element...