A visual tool for querying geographic databases

Blaser, Andreas D.; Egenhofer, Max J.

doi:10.1145/345513.345318

Cited by 41 publications

(17 citation statements)

References 21 publications

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“…In freehand sketches, landmarks are vectorized and approximated by polygons which represent spatial entities such as water bodies, buildings, and parks. Landmarks and road entities are the most frequently depicted spatial objects in sketch maps [3], while city-blocks are the smallest regions. They are delimited by a lineal representation of connected street segments.…”

Section: A Spatial Objectsmentioning

confidence: 99%

Spatial Rules for Capturing Qualitatively Equivalent Configurations in Sketch maps

Jan¹,

Schultz²,

Schwering³

et al. 2015

Proceedings of the LQMR 2015 Workshop

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Abstract-Sketch maps are an externalization of an individual's mental images of an environment. The information represented in sketch maps is schematized, distorted, generalized, and thus processing spatial information in sketch maps requires plausible representations based on human cognition. Typically only qualitative relations between spatial objects are preserved in sketch maps, and therefore processing spatial information on a qualitative level has been suggested. This study extends our previous work on qualitative representations and alignment of sketch maps. In this study, we define a set of spatial relations using the declarative spatial reasoning system CLP(QS) as an approach to formalizing key spatial aspects that are preserved in sketch maps. Unlike geo-referenced maps, sketch maps do not have a single, global reference frame. Rather, the sketched elements themselves act as referencing objects. Using the declarative spatial reasoning system CLP(QS), we define constraint logic programming rules that formalize various key spatial aspects of sketch maps at a local level, between nearby objects. These rules focus on linear ordering, cyclic ordering, and relative orientation of depicted objects along, and around, salient reference objects.

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Section: A Spatial Objectsmentioning

confidence: 99%

Spatial Rules for Capturing Qualitatively Equivalent Configurations in Sketch maps

Jan¹,

Schultz²,

Schwering³

et al. 2015

Proceedings of the LQMR 2015 Workshop

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show abstract

“…Complex spatial constraints (which are hard to interpret linguistically) can often be easily specified through simple pointing and circling. A more promising approach would be to integrate language and gesture [6,28,58,79] to form multimodal interfaces.…”

Section: From Computer Modalities To Human Modalitiesmentioning

confidence: 99%

Human-GIS interaction issues in crisis response

Cai¹,

Sharma

MacEachren

et al. 2006

IJRAM

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Abstract. Geospatial information systems (GIS) provide a central infrastructure forcomputer supported crisis management in terms of database, analytical models and visualization tools, but the user interfaces of such systems are still hard to use, and do not address the special needs of crisis managers who often work in teams and make judgments and decisions under stress. This paper articulates the overall challenges for effective GIS interfaces to support crisis management in three dimensions: immediacy, relevancy, and sharing. These three requirements are addressed by an integrated approach, taking a human-GIS interaction perspective. To demonstrate the feasibility of this approach, we cite our prototype system, DAVE_G (Dialogue-Assisted Visual Environment for Geoinformaton), as an example. DAVE_G uses a large screen display to create a shared workspace among team members, and allows risk managers to interact with a GIS through natural multimodal (speech/gesture) dialogues. This work highlights the design challenges and the required technical innovations towards the goal of making geographical information accessible to crisis management teams.Keywords: geographical information systems, human-computer interaction, multimodal interface, speech and gesture, dialogue management, geovisualization Bibliographical notes: Guoray Cai is Assistant Professor of Information Sciences andTechnology with the school of Information Sciences and Technology at the Pennsylvania State University. He is the director of the Spatial Information and Intelligence Laboratory, and an affiliate faculty of GeoVISTA center at Penn State. His research interests include spatial information retrieval, multimodal interfaces for GIS, conversational dialogue systems, and map-mediated communication and collaboration. He is a member of ACM, IEEE, and AAG (American Association of Geographers). Representation, Visualization, and Design (New York, Guilford, 1995). Dr. MacEachren is currently Chair of the International Cartographic Association Commission on Visualization and Virtual Environments. Rajeev Sharma is an Associated Professor of Computer Science and Engineering atIsaac Brewer is a Ph.D. degree candidate at the Department of Geography and the GeoVISTA Center, Pennsylvania State University, University Park. His dissertation research is focused on the development of a cognitive systems engineering approach to guide design of advanced human-computer interfaces that support collaborative actions with a GIS in emergency management situations. His long-term research interests are in the modeling of human cognitive processes and visual systems as it relates to the design of new interface technologies for geographical information.

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“…In spatial-query-by-sketch [5], [19], users build up queries by drawing spatial con®gurations on a touch sensitive screen. Users can reduce the similarity ranking to lower the accuracy threshold for the result by relaxing spatial relations.…”

Section: Non-textual Spatial Querying Languagesmentioning

confidence: 99%

A Filter Flow Visual Querying Language and Interface for Spatial Databases

et al. 2004

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In this paper a visual approach to querying in spatial databases is presented. A ®lter¯ow methodology is used to consistently express different types of queries in these systems. Filters are used to represent operations on the database and pictorial icons are used throughout the language for ®lters, operators and spatial relations. Different granularities of the relations are presented in a hierarchical fashion for spatial constraints. The language framework and functions are described and examples are used to demonstrate its capabilities in representing different levels of queries, including spatial joins and composite spatial joins. Here, the primary focus is on the query language itself but an overview of the implemented interface of the language is also provided.

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A visual tool for querying geographic databases

Cited by 41 publications

References 21 publications

Spatial Rules for Capturing Qualitatively Equivalent Configurations in Sketch maps

Spatial Rules for Capturing Qualitatively Equivalent Configurations in Sketch maps

Human-GIS interaction issues in crisis response

A Filter Flow Visual Querying Language and Interface for Spatial Databases

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