Ulkoreunat

Ulkoreunat is a Finnish term that denotes the outer edges or boundaries of an object, region, or concept. The word is formed from ulko-, meaning outer, and reuna, meaning edge or border; the plural ulkoreunat is used when referring to multiple outer edges.

In geography and cartography, ulkoreunat refers to the outer borders of a region or the coastline and external limits shown on a map. In mathematics and geometry, the term is used informally to describe the exterior boundary of a set or shape, as distinct from its interior features. The concept can also appear in discussions of delimitation or territorial boundaries, where ulkoreunat help frame questions of jurisdiction or extent.

In design, publishing, and printing, ulkoreunat describes the outer margins or bleed areas around a page or layout. Correct handling of these margins is important for ensuring that content is not cut off during trimming and that the final composition conforms to the intended appearance.

In more technical contexts, such as image processing or computer vision, the term may be used to refer to the outermost pixels or the detected boundary of a region within an image, often as part of edge-detection workflows.

Because ulkoreunat is primarily used in Finnish-language contexts, English-language sources typically translate the term as “outer boundary,” “outer edge,” or “outer margins,” depending on context. See also: border, boundary, margin, edge.