IEEE Transactions on Visualization and Computer Graphics
The Ambient Tag Cloud: A New Concept for Topic-Driven Mobile Urban Exploration
AmI '09 Proceedings of the European Conference on Ambient Intelligence
Getting context on the go: mobile urban exploration with ambient tag clouds
Proceedings of the 6th Workshop on Geographic Information Retrieval
Visualization with a new visual metaphor for hierarchical and stratified temporal domain
W2GIS'12 Proceedings of the 11th international conference on Web and Wireless Geographical Information Systems
Navigating tomorrow's web: From searching and browsing to visual exploration
ACM Transactions on the Web (TWEB)
Visualizations in exploratory search: a user study with stock market information
Proceedings of the 12th International Conference on Knowledge Management and Knowledge Technologies
Proceedings of the 30th European Conference on Cognitive Ergonomics
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'Tag clouds' and 'tag maps' are introduced to represent geographically referenced text. In combination, these aspatial and spatial views are used to explore a large structured spatio-temporal data set by providing overviews and filtering by text and geography. Prototypes are implemented using freely available technologies including Google Earth and Yahoo!'s Tag Map applet. The interactive tag map and tag cloud techniques and the rapid prototyping method used are informally evaluated through successes and limitations encountered. Preliminary evaluation suggests that the techniques may be useful for generating insights when visualizing large data sets containing geo-referenced text strings. The rapid prototyping approach enabled the technique to be developed and evaluated, leading to geovisualization through which a number of ideas were generated. Limitations of this approach are reflected upon. Tag placement, generalisation and prominence at different scales are issues which have come to light in this study that warrant further work.