The paper presents the work in progress to use the digital data of the Authoritative Topographic Cartographic Information System (ATKIS), the geobase information system of the German national mapping agencies, to automatically deduce location maps. It is possible to render location maps in different ways. First of all there is to differentiate between a textual and a graphic kind of route description. The paper focuses on different graphic representations. One possible graphic illustration of the route description can be designed as a hierarchy of map clippings in different levels of details ranging from small to large scale. As another possibility the directions can be visualized as a route corridor from start- to endpoint, where the relevant streets, as well as the important landmarks along the streets are presented.

Abstract. This paper explores the possibility of organizing map design around conceptual spatial representations (CSRs). CSR refers to a mental representation that is instantiated in interaction with a spatial environment, a spatial representational medium, and/or while solving spatial problems. For this approach we coin the term cognitive conceptual. We detail the basic assumptions in a contrastive manner, i.e., by juxtaposing it against a stylized cartographic approach, and indicate future directions for this research.

Abstract. Conventional models of navigation commonly assume a navigation agent’s location can be precisely determined. This paper examines the more general case, where an agent’s actual location cannot be precisely determined. This paper develops a formal model of navigation under imprecision using a graph. Two key strategies for dealing with imprecision are identified and defined: contingency and refinement. A contingency strategy aims to find an instruction sequence that maximizes an agent’s chances of reaching its destination. A refinement strategy aims to use knowledge gained as an agent moves through the network to disambiguate location. Examples of both strategies are empirically tested using a simulation with computerized navigation agents moving through a road network at different levels of locational imprecision. The results of the simulation indicate that both the strategies, contingency and refinement, applied individually can produce significant improvements in navigation performance under imprecision, at least at relatively fine granularities. Using both strategies in concert produced significant improvements in performance across all granularities. 1.

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The paper presents the work in progress to use the digital data of the Authoritative Topographic