Visualization Symposium, IEEE Pacific (2011)
Hong Kong, China
Mar. 1, 2011 to Mar. 4, 2011
Many data sets exist that contain both geospatial and temporal elements, in addition to the core data that requires analysis. Within such data sets, it can be difficult to determine how the data have changed over spatial and temporal ranges. In this design study we present a system for dynamically exploring geo-temporal changes in the data. GTdiff provides a visual approach to representing differences in the data within user-defined spatial and temporal limits, illustrating when and where increases and/or decreases have occurred. The system makes extensive use of spatial and temporal filtering and binning, geo-visualization, colour encoding, and multiple coordinated views. It is highly interactive, supporting knowledge discovery through exploration and analysis of the data. A case study is presented illustrating the benefits of using GTdiff to analyze the changes in the catch data of the cod fisheries off the coast of Newfoundland, Canada from 1948 to 2006.
geographic information systems, data mining, data visualisation, cod fisheries, geo-temporal difference, GTdiff, data set, geospatial element, temporal element, geo-temporal change, user-defined spatial, spatial filtering, temporal filtering, binning, geo-visualization, colour encoding, multiple coordinated view, knowledge discovery, Image color analysis, Visualization, Geospatial analysis, Encoding, Spatial databases, Data visualization, Complexity theory, J.2 [Computer Applications]: Physical Sciences and Engineering—Earth and Atmospheric Sciences, H.5.2 [Information Systems]: Information Interfaces and Presentation—User Interfaces
"Exploring geo-temporal differences using GTdiff," 2011 IEEE Pacific Visualization Symposium (PacificVis)(PACIFICVIS), Hong Kong, 2011, pp. 139-146.