ISO 25178 – Areal Roughness Measurement
Definition: ISO 25178 is an international series of standards for three-dimensional areal surface measurement. It defines 3D parameters such as Sa, Sz and Ssk. It is based on optical or tactile 3D measuring systems.
Practical relevance: The standard extends profile-based roughness analysis (ISO 4287) with areal parameters. It is relevant for tribological, functional and microstructured surfaces.
