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Related Experiment Video

Updated: May 7, 2026

Visualizing Oceanographic Data to Depict Long-term Changes in Phytoplankton

Visualizing Oceanographic Data to Depict Long-term Changes in Phytoplankton

Published on: July 28, 2023

Visualizing change over time using dynamic hierarchies: TreeVersity2 and the StemView.

Johnalexis Guerra-Gómez¹, Michael L Pack, Catherine Plaisant

¹University of Maryland.

IEEE Transactions on Visualization and Computer Graphics

|September 21, 2013

Summary

This summary is machine-generated.

TreeVersity2 is a novel web-based tool for analyzing data changes over time. It uses a unique StemView visualization to explore dynamic hierarchies and identify significant data shifts across various organizations.

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Area of Science:

Data Visualization
Information Science

Background:

Analyzing temporal data changes is crucial for understanding trends in diverse fields like government budgets and university demographics.
Grouping data by attributes enhances the analysis of changes over time, but existing tools often lack comprehensive visualization capabilities.

Purpose of the Study:

To introduce TreeVersity2, a web-based interactive data visualization tool designed for analyzing changes in datasets.
To present StemView, a novel space-filling visualization for representing multi-level tree changes and maintaining contextual integrity.

Main Methods:

TreeVersity2 enables users to create dynamic hierarchies based on data attributes for temporal analysis.
The tool features StemView for visualizing absolute/relative changes, node creation/deletion, and node values within a tree context.
Includes overviews of changes across time periods and a reporting tool for identifying outliers.

Main Results:

TreeVersity2 was validated through 12 diverse case studies, including government agencies and commercial organizations.
Demonstrated flexibility across different domains, providing valuable insights for data owners.
Case studies confirmed the tool's utility in identifying major data changes without manual filtering.

Conclusions:

TreeVersity2 offers a flexible and insightful approach to analyzing temporal data changes.
The StemView visualization effectively represents complex changes within hierarchical data structures.
The tool's applicability across various sectors highlights its potential for broad data analysis needs.