October 7 – 12 , 2018, Dagstuhl Seminar 18411

Progressive Data Analysis and Visualization


Jean-Daniel Fekete (INRIA Saclay – Orsay, FR)
Danyel Fisher (Honeycomb – San Francisco, US)
Arnab Nandi (Ohio State University – Columbus, US)
Michael Sedlmair (Jacobs University Bremen, DE)

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Annette Beyer for administrative matters

Andreas Dolzmann for scientific matters


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We live in an era where data is abundant and growing rapidly; databases storing big data sprawl past memory and computation limits, and across distributed systems. New hardware and software systems have been built to sustain this growth in terms of storage management and predictive computation. However, these infrastructures, while good for data at scale, do not well support exploratory data analysis (EDA) as, for instance, commonly used in Visual Analytics. EDA allows human users to make sense of data with little or no known model on this data and is essential in many application domains, from network security and fraud detection to epidemiology and preventive medicine. Data exploration is done through an iterative loop where analysts interact with data through computations that return results, usually shown with visualizations, which in turn are interacted with by the analyst again. Due to human cognitive constraints, exploration needs highly responsive system response times: at 500 ms, users change their querying behavior; past five or ten seconds, users abandon tasks or lose attention. As datasets grow and computations become more complex, response time suffers. To address this problem, a new computation paradigm has emerged in the last decade under several names: online aggregation in the database community; progressive, incremental, or iterative visualization in other communities. It consists of splitting long computations into a series of approximate results improving with time; in this process, partial or approximate results are then rapidly returned to the user and can be interacted with in a fluent and iterative fashion. With the increasing growth in data, such progressive data analysis approaches will become one of the leading paradigms for data exploration systems, but it also will require major changes in the algorithms, data structures, and visualization tools used today.

This Dagstuhl Seminar sets out to discuss and address these challenges, by bringing together researchers from the different involved research communities: database, visualization, and machine learning. Thus far, these communities have often been divided by a gap hindering joint efforts in dealing with forthcoming challenges in progressive data analysis and visualization. The seminar will give a platform for these researchers and practitioners to exchange their ideas, experience, and visions, jointly develop strategies to deal with challenges, and create a deeper awareness of the implications of this paradigm shift. The implications are technical, but also human – both perceptual and cognitive – and the seminar will provide a holistic view of the problem by gathering specialists from all the communities.

Topics of the seminar will include: (1) Online aggregation and progressive data querying, (2) progressivity in analysis operations and algorithms, (3) visualization challenges and opportunities from progressivity, (4) progressivity in the user interface, (5) computational steering, and (6) revisiting the contract between the application and the data infrastructure.

  Creative Commons BY 3.0 DE
  Jean-Daniel Fekete, Danyel Fisher, Arnab Nandi, and Michael Sedlmair


  • Artificial Intelligence / Robotics
  • Data Bases / Information Retrieval
  • Society / Human-computer Interaction


  • Visualization
  • Visual analytics
  • Database
  • Big-data
  • Human-computer interaction

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