The surface data model in Visum

In Visum boundaries can be shaped for the network objects zones, main zones, restricted traffic areas, territories, main nodes, GIS objects, and POIs (polygons). Polygons describe the location and extent of network objects. Based on freely definable points and edges that connect these points, they are defined as surfaces independent of the network and allocated to the respective network objects via the SurfaceID attribute. The surfaces are displayed in the Visum surface model.