The vast majority of the information content of the internet is in relation to some physical location. In order to support the development of applications, which exploit this fact, it makes sense to offer a platform that provides fundamental spatial services. The aim of the Nexus-project, which embeds this thesis, is to develop such a platform.

It requires a model of the physical space to be able to make spatial services available. The server-component, which is to be developed as a part of this thesis, manages spatial models that are enriched by so-called virtual objects. Virtual objects can only be perceived via the platform. At augmented locations they provide information. Among others, the server- component offers spatial analyses and navigation support. Also, the real world can be manipulated by the platform.

This thesis encompasses the development of a prototypical server-component that is based on a geographical information system. Moreover, it defines the spatial services of the server-component. Finally, it examines the architecture of a federated system of multiple server-components from a conceptual point of view