Integrating 2D Parcels and 3D Objects in One Environment*

The insertion of 3D geo-objects in the cadastral database containing 2D parcels touches on the fundamental issue of combining 2D and 3D geo-objects (geographical features) in one environment: What is the vertical relation between 2D and 3D geo-objects and how can these two sources be integrated in one environment? These issues are addressed in this chapter.