Labelvlak

Labelvlak is a Dutch term used primarily in computer graphics, 3D modeling and related fields to denote a surface element (vlak) of a polygonal mesh that has an associated label. The label encodes semantic or categorical information such as material type, region identity, or functional class. A labelvlak can be per-face, per-vertex, or per-region in a model or dataset, and is used to guide rendering, simulation, or analysis. In practice, labelvlak data are stored as attributes attached to faces or polygons, often as an integer or string identifier corresponding to a label map or material library. In workflows such as segmentation of 3D scans, the label on each face indicates which segment the facet belongs to.

In GIS and CAD contexts, similar concepts exist under terms like labeled surface or polygon with attributes, and label information may be used for visualization (coloring), queries, or spatial analysis. The notion is complementary to geometry alone: while the geometry defines the coordinates and topology, the label provides metadata.

Etymology: labelvlak combines label from English 'label' and vlak meaning plane or surface in Dutch.

See also: mesh, face, polygon, label map, materials, semantic segmentation, attribute data.

Note: The term is common in Dutch-language technical literature but not a universally standard term in English-language literature; equivalent terms include 'labeled face' or 'labeled polygon.'