Stacking-Based Visualization of Trajectory Attribute Data
Stacking-Based Visualization of Trajectory Attribute Data
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DOI：
10.1109/tvcg.2012.265
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发表时间：
2012-12-01
影响因子：
5.2
通讯作者：
Andrienko, Natalia
中科院分区：
文献类型：
--
作者：
Tominski, Christian;Schumann, Heidrun;Andrienko, Natalia
可视化轨迹属性数据具有挑战性，因为它涉及到在时空背景下显示轨迹以及与轨迹各个点相关的属性值。之前关于轨迹可视化的工作解决了这个问题的某些方面，但不是全部。提出了一种新的轨迹属性数据可视化方法。我们的解决方案涵盖了空间、时间和属性值。在分析相关可视化任务的基础上，围绕轨道带叠加原理设计了可视化方案。我们方法的核心是混合2D/3D显示。2D地图作为空间背景的参考，轨迹被可视化为堆叠的3D轨迹带，属性值按颜色编码。时间通过适当的频带排序和动态查询机制集成，该机制将临时聚合的信息提供给循环时间显示。另外一个二维时间图通过叠加二维轨迹带来详细显示时间信息。我们的解决方案配备了分析和交互机制，用于选择和排序轨迹，调整颜色映射，以及协调高亮和专用3D导航。我们通过三个与辐射监测、交通分析和海上导航相关的例子来证明我们的新可视化的有用性。在一个小型实验中获得的用户反馈表明，我们的混合2D/3D解决方案可以很好地运行。
Visualizing trajectory attribute data is challenging because it involves showing the trajectories in their spatio-temporal context as well as the attribute values associated with the individual points of trajectories. Previous work on trajectory visualization addresses selected aspects of this problem, but not all of them. We present a novel approach to visualizing trajectory attribute data. Our solution covers space, time, and attribute values. Based on an analysis of relevant visualization tasks, we designed the visualization solution around the principle of stacking trajectory bands. The core of our approach is a hybrid 2D/3D display. A 2D map serves as a reference for the spatial context, and the trajectories are visualized as stacked 3D trajectory bands along which attribute values are encoded by color. Time is integrated through appropriate ordering of bands and through a dynamic query mechanism that feeds temporally aggregated information to a circular time display. An additional 2D time graph shows temporal information in full detail by stacking 2D trajectory bands. Our solution is equipped with analytical and interactive mechanisms for selecting and ordering of trajectories, and adjusting the color mapping, as well as coordinated highlighting and dedicated 3D navigation. We demonstrate the usefulness of our novel visualization by three examples related to radiation surveillance, traffic analysis, and maritime navigation. User feedback obtained in a small experiment indicates that our hybrid 2D/3D solution can be operated quite well.