User interaction in a sketch-based GIS user interface

Blaser, Andreas D.

doi:10.1007/3-540-63623-4_74

Cited by 6 publications

(3 citation statements)

References 11 publications

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“…Despite its theoretical expressive power, the queries are difficult to formulate; drawing is a difficult task, particularly for users with limited skills. Blaser(1997) argues that the task can be simpler for users with some training or practice in drawing but, even then, using a computer interface to draw is usually unnatural. Regardless of whether the user is able to draw a good example to perform the query, the success of the system will depend on how the query is interpreted by the system.…”

Section: Query By Sketchmentioning

confidence: 99%

Query by Visual Example: A Comparative Study of the Efficacy of Image Query Paradigms in Supporting Visual Information Retrieval

Venters

2011

Journal of Information Management

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Query by visual example is the principal query paradigm for expressing queries in a content-based image retrieval environment. Query by image and query by sketch have long been purported as being viable methods of query formulation yet there is little empirical evidence to support their efficacy in facilitating query formulation. The ability of the searcher to express their information problem to an information retrieval system is fundamental to the retrieval process. The aim of this research was to investigate the query by image and query by sketch methods in supporting a range of information problems through a usability experiment in order to contribute to the gap in knowledge regarding the relationship between searchers' information problems and the query methods required to support efficient and effective visual query formulation. The results of the experiment suggest that query by image is a viable approach to visual query formulation. In contrast, the results strongly suggest that there is a significant mismatch between the searchers information problems and the expressive power of the query by sketch paradigm in supporting visual query formulation. The results of a usability experiment focusing on efficiency (time), effectiveness (errors) and user satisfaction show that there was a significant difference, p<0.001, between the two query methods on all three measures: time (Z=-3.597, p<0.001), errors (Z=-3.317, p<0.001), and satisfaction (Z=-10.223, p<0.001).The results also show that there was a significant difference in participants perceived usefulness of the query tools Z=-4.672, p<0.001.

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Section: Query By Sketchmentioning

confidence: 99%

Query by Visual Example: A Comparative Study of the Efficacy of Image Query Paradigms in Supporting Visual Information Retrieval

Venters

2011

Journal of Information Management

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“…And sketch maps are themselves visually simple, twodimensional representations of features in an environment and the spatial relations among them. Sketch maps can serve as an intuitive user interface for geospatial computer applications (e.g., [2][3][4]). In this paper, we demonstrate the conceptual outline of an algorithm for the (semi) automatic construction of plausible, twodimensional sketch maps, based on the extraction of spatial relations and features from text-based natural language (NL) descriptions.…”

Section: Introductionmentioning

confidence: 99%

From Descriptions to Depictions: A Conceptual Framework

Vasardani

Timpf

Winter

et al. 2013

Spatial Information Theory

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Abstract. People use verbal descriptions and graphical depictions to communicate spatial information, thus externalizing their spatial mental representations. In many situations, such as in emergency response, the ability to translate the content of verbal descriptions into a sketch map could greatly assist with the interpretation of the message. In this paper, we present an outline of a semi-automatic framework enabling seamless transition between verbal descriptions and graphical sketches of precinct-scale urban environments. The proposed framework relies on a three-step approach: NL parsing, with spatial named entity and spatial relation recognition in natural language text; the construction of a spatial Property Graph capturing the spatial relationships between pairs of entities; and the sketch drawing step where the identified entities are dynamically placed on a canvas in a manner that minimizes conflicts between the verbalized spatial relationships, thus providing a plausible representation of the described environment. The approach is manually demonstrated on a natural language description of a university campus, and the opportunities and challenges of the suggested framework are discussed. The paper concludes by highlighting the contributions of the framework and by providing insights for its actual implementation.

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“…For 'average' users the multi-modal presentation of data can provide intuitive interaction with geographic information, making it accessible and easy to use [21]. For expert users it has significant potential to allow novel visualization [22].…”

Section: Variables In Multimodal Interfacesmentioning

confidence: 99%

Representing spatial information through multimodal interfaces

Jacobson

Proceedings Sixth International Conference on Information Visualisation

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The research discussed here is a component of a larger study to explore the accessibility and usability of spatial data presented through multiple sensory modalities including haptic, auditory, and visual interfaces. Geographical Information Systems (GIS) and other computer-based tools for spatial display predominantly use vision to communicate information to the user, as sight is the spatial sense par excellence. Ongoing research is exploring the fundamental concepts and techniques necessary to navigate through multimodal interfaces, which are user, task, domain, and interface specific. This highlights the necessity for both a conceptual / theoretical schema, and the need for extensive usability studies. Preliminary results presented here exploring feature recognition, and shape tracing in non-visual environments indicate multimodal interfaces have a great deal of potential for facilitating access to spatial data for blind and visually impaired persons. The research is undertaken with the wider goals of increasing information accessibility and promoting "universal access".

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User interaction in a sketch-based GIS user interface

Cited by 6 publications

References 11 publications

Query by Visual Example: A Comparative Study of the Efficacy of Image Query Paradigms in Supporting Visual Information Retrieval

Query by Visual Example: A Comparative Study of the Efficacy of Image Query Paradigms in Supporting Visual Information Retrieval

From Descriptions to Depictions: A Conceptual Framework

Representing spatial information through multimodal interfaces

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