The information needed for River Basin Management covers a wide range of hydrological and environmental data and methods. Since all measurement data are spatial and time related, spatial services fulfill the requirements in a decision making process best. In this work an open data structure for storing spatial temporal related data is proposed. Based on the data structure the modeling process c...

We study the problem of consistency checking for constraint networks over combined qualitative formalisms. We propose a framework which encompasses loose integrations and a form of spatio-temporal reasoning. In particular, we identify sufficient conditions ensuring the polynomiality of consistency checking, and we use them to find tractable subclasses.

We discuss the problems of spatio-temporal reasoning in the context of hierarchical information maps and approximate reasoning networks (AR networks). Hierarchical information maps are used for representation of domain knowledge about objects, their parts, and their dynamical changes. They are constructed out of information maps connected by some spatial relations. Each map describes changes (e...

Qualitative spatial reasoning (QSR) pursues a symbolic approach to reasoning about a spatial domain. Qualitative calculi are defined to capture domain properties in relation operations, granting a relation algebraic approach to reasoning. QSR has two primary goals: providing a symbolic model for human common-sense level of reasoning and providing efficient means for reasoning. In this paper, we...

Though arrangement knowledge is well suited for qualitative representations of spatial situations, if we only use this kind of knowledge, we cannot do interesting inferences about relative positions of points in the plane. For example, if we know the orientation of two triangles over four points, we cannot say anything about the orientation of the other two triangles. In this paper, we show tha...

We present data from a teacher professional development intervention, a work circle where researchers (expert in the domain of spatial reasoning) and teachers (expert in teaching in a classroom) worked together to develop spatial tools, based on lab evidence, which could be used in actual classroom lessons. We found that, although spatial anxiety was not directly addressed during work circle ac...