基于城市群的空气质量数据的可视分析方法研究

Urban Agglomerations-Based Visual Analysis of Air Quality Data

空气污染正迅速成为一个重要的社会问题,并越来越受到公众和科学界的关注和重视.不同城市间的空气质量如何相互影响?不同城市的空气质量属性间有哪些相似性和差异性,以及哪些因素会影响空气质量的相互作用?为了回答这些复杂的问题,提出一个全面的基于城市群分布的可视分析系统以探索城市群的动态演变过程.该方法包括Voronoi图以展示城市群在空间上的分布以及在空间上的演变过程,嵌入式线条堆栈图以展示城市群在时间上的演变过程,平行坐标视图以展示城市群的污染情况.文中方法已用于城市空气质量的真实数据分析中,该系统可以用来探索城市群的演变,并为城市群的联合污染防治提供必要的基础.

Air pollution has gradually become an important issue,and has attracted more and more attentionfrom the general public and the scientific community.How do different cities interact with each other withrespect to the air quality issue?What is the similarity and difference among the air quality attributes of distinctcities,and what factors may influence the interaction?We answer these intricate questions by proposinga comprehensive visual analysis system to explore the evolution of an urban agglomeration.The methodproposes a Voronoi diagram to show the spatial distribution of urban agglomeration and the evolution of urbanagglomeration in space,a stacked graph with threads embedded to show urban agglomeration in the timeevolution process,and a parallel coordinates diagram to show the pollution situation of urban agglomerations.We have applied our method to the real urban air quality data.Our system was used to explore theevolution of urban agglomeration and provide a necessary foundation for united pollution prevention of urbanagglomerations.