överlagrar

Överlagra is a Swedish verb meaning to place one element on top of another, so that parts of both elements remain visible. The form överlagrar is the present tense used when describing an action performed by a person, a program, or a system. The concept is widely used in technical and creative contexts where layered information is combined to form a composite.

In graphic design, photo editing, and video production, överlagring describes the act of superimposing images, graphics, or video tracks. In geospatial information systems (GIS) and cartography, the term is used for overlay operations that combine data layers such as elevation, land use, and satellite imagery to derive new spatial products. In data visualization, overlays can add annotations, heatmaps, or reference grids on top of existing charts. In user interface design, overlays refer to elements that appear above the main content, such as modal dialogs or tooltip layers.

Key aspects of överlagring include alignment of coordinates, control of transparency (alpha), and blending modes that determine how colors mix at the intersection of layers. The term is neutral and descriptive, without implying a specific software or file format.