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A systematic view on data descriptors for the visual analysis of tabular data

机译:数据描述符的系统视图,用于表格数据的可视化分析

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摘要

Visualization has become an important ingredient of data analysis, supporting users in exploring data and confirming hypotheses. At the beginning of a visual data analysis process, data characteristics are often assessed in an initial data profiling step. These include, for example, statistical properties of the data and information on the data's well-formedness, which can be used during the subsequent analysis to adequately parametrize views and to highlight or exclude data items. We term this information data descriptors, which can span such diverse aspects as the data's provenance, its storage schema, or its uncertainties. Gathered descriptors encapsulate basic knowledge about the data and can thus be used as objective starting points for the visual analysis process. In this article, we bring together these different aspects in a systematic form that describes the data itself (e.g. its content and context) and its relation to the larger data gathering and visual analysis process (e.g. its provenance and its utility). Once established in general, we further detail the concept of data descriptors specifically for tabular data as the most common form of structured data today. Finally, we utilize these data descriptors for tabular data to capture domain-specific data characteristics in the field of climate impact research. This procedure from the general concept via the concrete data type to the specific application domain effectively provides a blueprint for instantiating data descriptors for other data types and domains in the future.
机译:可视化已成为数据分析的重要组成部分,可支持用户探索数据并确认假设。在视觉数据分析过程的开始,通常在初始数据分析步骤中评估数据特征。这些包括,例如,数据的统计属性以及有关数据格式正确的信息,可在后续分析期间使用它们来适当地参数化视图并突出显示或排除数据项。我们将这种信息数据描述符称为“数据描述符”,它可以涵盖诸如数据的来源,存储模式或不确定性之类的各个方面。收集的描述符封装了有关数据的基本知识,因此可以用作可视化分析过程的客观起点。在本文中,我们以系统的形式将这些不同方面组合在一起,以描述数据本身(例如其内容和上下文)及其与较大数据收集和可视化分析过程的关系(例如其来源和实用性)。一旦建立起来,我们将进一步详细介绍专门用于表格数据的数据描述符的概念,这是当今结构化数据的最常见形式。最后,我们将这些数据描述符用于表格数据,以捕获气候影响研究领域中特定领域的数据特征。从一般概念到具体数据类型到特定应用程序域的此过程有效地提供了一个蓝图,用于将来为其他数据类型和域实例化数据描述符。

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