Fusion of SAR and optical images has to cope with the different imaging properties of both sensor types. In order to allow a meaningful data fusion, highly accurate geo-referenced images have to be provided. Based on CAD models of buildings, for example from available 3D-city models, simulated SAR images can be created using a SAR simulator. The correspondence between images of buildings create...

We physically relate to our environment in three dimensions. However, familiar modes of interaction reside in 2D, which mimic our interactions with traditional paper-based media. In this work, our aim is to combine the situational understanding that can be gained from 3D GIS, with familiar paper-based interaction. Our system situates 3D terrains within a metaphor of a 2D interactive scrapbook o...

The wide-spread use of GOCAD [Mal92a, GC99] in the geosciences as an application for 3D-modeling makes it a significant tool for an open 3D-GIS environment. Therefore GOCAD should provide an open interface for an object-oriented data and methods exchange. Unfortunately, hitherto GOCAD’s 3Dobjects are not managed by modern database technology. Therefore it is proposed to develop a coupling betwe...

Qualitative Spatial Reasoning (QSR) theories have applications in areas such as Geographic Information Systems (GIS), robotics, biomedicine, and engineering. However, existing QSR theories primarily have been applied only to 2D data. Herein we introduce a 3D reasoning system that is based on Generalized 2D Region Connection Calculus (GRCC). Our theory, RCC-3D, supports a priori knowledge of the...

In this paper we report on a linked environment of the three programs XGobi, XploRe, and ViR-GIS. While XGobi and XploRe are statistical packages that focus on dynamic statistical graphics and provide analytical statistical features, respectively, ViRGIS is a 3D Virtual Reality Geographic Information System (GIS) that allows real{time access to, and visualization of, geographic data. The XGobi/...

In this paper we report on a linked environment of the three programs XGobi, XploRe, and ViR-GIS. While XGobi and XploRe are statistical packages that focus on dynamic statistical graphics and provide analytical statistical features, respectively, ViRGIS is a 3D Virtual Reality Geographic Information System (GIS) that allows real{time access to, and visualization of, geographic data. The XGobi/...

The maintenance, visualization and query of 3D urban data has always been problematic due to the complexity of geometry, diversity of attribute information, large amounts of data, demanded comprehensive analysis and queries requiring new techniques for visualization and query. The approach presented here aims visualization and query via Internet and utilizes established standards and techniques...

Generation of 3D city models has been evolving to be one of the most relevant and active research topics as many application areas require them. Planning of Telecommunications, Urban development, Managing disasters, Prevention of Hazards, City design, developing TV games, etc., are some of the application areas where 3D city models are precisely and accurately needed. Several concepts from Geo-...

This research is motivated by the need for 3D GIS data models that allow for 3D spatial query, analysis and visualization of the subunits and internal network structure of ‘micro-spatial environments’ (the 3D spatial structure within buildings). It explores a new way of representing the topological relationships among 3D geographical features such as buildings and their internal partitions or s...