TS EN ISO 14660-2

TS EN ISO 14660-2 is a Geometrical Products Specification (GPS) standard focused on extracted features used in the interpretation of workpiece geometry. In particular, it addresses the extracted median line of a cylinder and a cone, the extracted median surface, and the local size of an extracted feature. These concepts help define how measurement data taken from a real surface is translated into a usable geometric description.

What extracted features mean in GPS

In the GPS framework, a manufactured surface rarely matches its ideal geometry perfectly. Measured points must be sampled and evaluated before a feature can be described. An extracted median line or extracted median surface is therefore a representative element derived from measurement data, rather than a purely theoretical shape. For cylindrical and conical features, these terms support a consistent interpretation of form, orientation and size. Local size refers to the size at a particular location on the extracted feature, not only to the overall size of the entire element.

What this standard covers

• Terminology and definitions for extracted features used on workpieces
• Extracted median line concepts for cylindrical and conical features
• Extracted median surface concepts
• Local size of an extracted feature
• Common language for measurement interpretation in GPS and technical drawings

The document is primarily valuable as a terminology and concept standard. It should be understood as a guide to naming and defining geometric elements, not as a manufacturing process specification or a test method with acceptance limits. That makes it especially useful in design, metrology and drawing practice, where precise geometric language is essential.