This paper describes a knowledge based approach for automatic 3D reconstruction of buildings from aerial imagery. The approach relies on using a 2D GIS map and knowledge about the imaging geometry and acquisition parameters. We show that by integrating knowledge from the images and the GIS map, the complexity of the building reconstruction process can be greatly reduced. In the first stage the ...

Bridges and tunnels are semantically meaningful objects in Geographical Information Systems (GIS), playing an important role in terms of reachability between locations. From a topological point of view, bridges and tunnels on surfaces are captured by the notion of a handle. In this paper, we extend an existing axiomatic characterization of 3D surfaces, which guarantees consistency between geome...

The renovation and refurbishment market is rapidly expanding within the construction industry, bringing the role of the Facilities Management (FM) department to the forefront. Operating and maintaining a facility however, takes the biggest proportion of the lifecycle cost of a building, which can be costly and time consuming. The wide spread and use of advanced technologies within the construct...

The three-year Municipal Infrastructure Investment Planning (MIIP) project is currently investigating investment planning and strategic asset management. The project proposes using geographic information systems (GIS) as the framework for decision support tools for municipal infrastructure managers, and more specifically, as tools to assist them to prioritize infrastructure maintenance and capi...

This is the preprint version of our paper on ICWL2015. A virtual reality based enhanced technology for learning primary geography is proposed, which synthesizes several latest information technologies including virtual reality(VR), 3D geographical information system(GIS), 3D visualization and multimodal human-computerinteraction (HCI). The main functions of the proposed system are introduced, i...

The evaluation of 3D scenes observed from different sensors requires the co–registration of sensor images and the reconstruction of the 3D geometry. To solve both tasks the presented system exploits prior knowledge, represented explicitly by semantic nets, and uses a digital landscape model of a geoinformation system (GIS) as a hint for the object location. This is shown for the detection of co...

This paper describes the architecture of a truly integrated D GIS The system has two main components an extensible database Postgres and an extensible geographic front end GEO The database is extended with D geometric data types functions and a D access method The implementation of the D visualization is based on the graphics standard PEX The resulting system is again extensible and can be used...