The book deals with two central themes: data modeling and management for 3D objects during different time states and the opening of geoinformation systems to a new generation of component-based GIS. The way from first geo-database kernel systems to a component-based GeoToolKit is presented. Furthermore, the implementation of a component-based GIS with geological and geophysical applications is described. With the common data access to a geo-database the geological and the geophysical applications are brought closer together and profit from each other's interpretations of the data.