| |  | Fisher, Danyel | Hotmap: Looking at Geographic Attention read moreAbstract: Understanding how people use online maps allows data acquisition teams to concentrate their efforts on the portions of the map that are most seen by users. Online maps represent vast databases, and so it is insufficient to simply look at a list of the most-accessed URLs. Hotmap takes advantage of the design of a mapping systems imagery pyramid to superpose a heatmap of the log files over the original maps. Users behavior within the system can be observed and interpreted. This paper discusses the imagery acquisition task that motivated Hotmap, and presents several examples of information that Hotmap makes visible. we discuss the design choices behind Hotmap, including logarithmic color schemes; low-saturation background images; and tuning images to explore both infrequently-viewed and frequently-viewed spaces. | 2007 |
| | | Kang, Hyunmo | GeoDDupe: A Novel Interface for Interactive Entity Resolution in Geospatial Data read moreAbstract: Due to the growing interest in geospatial data mining and analysis, data cleaning and integration in geospatial data is becoming an important issue. Geospatial entity resolution is the process of reconciling multiple location references to the same real world location within a single data source (deduplication) or across multiple data sources (integration). In this paper, we introduce an interactive tool called GeoDDupe which effectively combines automatic data mining algorithms for geospatial entity resolution with a novel network visualization supporting users’ resolution analysis and decisions. We illustrate the GeoDDupe interface with an example geospatial dataset and show how users can efficiently and accurately resolve location entities. Finally, the case study with two real-world geospatial datasets demonstrates the potential of GeoDDupe. | 2007 |
| | | Jung, V. | MetaViz: Visual Interaction with Geospatial Digital Libraries read moreAbstract: Recent initiatives to geospatial digital libraries provide access to a wealth of distributed data, but offer only basic levels of interactivity and user assistance. Consequently, users find it difficult and time-consuming to browse through data collections and locate those data sets that meet their requirements. The MetaViz project addresses two of the major barriers preventing the extensive use of digital libraries: lack of usability and information overload. This research focuses on geospatial data, making it possible to develop effective visualization and interaction methods that are based on familiar spatial metaphors. The visualization methods developed employ three-dimensional techniques, combining several characteristics or dimensions of metadata into single graphical views. As those visualizations are based on map and landscape metaphors, they are easy to understand and provide instant overviews of complex data characteristics. The visualization methods have been integrated into MetaViz, an interactive system for browsing and searching geospatial data. In MetaViz, graphical views of data characteristics can be created and combined dynamically, levels of detail can be adjusted and the data sets found can be previewed and accessed. MetaViz helps users to locate and select appropriate geospatial data from various sources and to combine and use them in an effective way. | 1999 |
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