A visual analytics framework for spatio-temporal analysis and modelling

Authors:
Natalia Andrienko;Gennady Andrienko
Affiliations:
Fraunhofer Institute IAIS (Intelligent Analysis and Information Systems), Sankt Augustin, Germany;Fraunhofer Institute IAIS (Intelligent Analysis and Information Systems), Sankt Augustin, Germany
Venue:
Data Mining and Knowledge Discovery
Year:
2013

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Abstract

To support analysis and modelling of large amounts of spatio-temporal data having the form of spatially referenced time series (TS) of numeric values, we combine interactive visual techniques with computational methods from machine learning and statistics. Clustering methods and interactive techniques are used to group TS by similarity. Statistical methods for TS modelling are then applied to representative TS derived from the groups of similar TS. The framework includes interactive visual interfaces to a library of modelling methods supporting the selection of a suitable method, adjustment of model parameters, and evaluation of the models obtained. The models can be externally stored, communicated, and used for prediction and in further computational analyses. From the visual analytics perspective, the framework suggests a way to externalize spatio-temporal patterns emerging in the mind of the analyst as a result of interactive visual analysis: the patterns are represented in the form of computer-processable and reusable models. From the statistical analysis perspective, the framework demonstrates how TS analysis and modelling can be supported by interactive visual interfaces, particularly, in a case of numerous TS that are hard to analyse individually. From the application perspective, the framework suggests a way to analyse large numbers of spatial TS with the use of well-established statistical methods for TS analysis.