中文摘要：

树图是一种流行的利用包含关系表达层次化数据的可视化方法．由于其呈现数据时高效的空间利用率和良好的交互性，受到众多的关注，得到深入的研究，并在科学、社会学、工程、商业等领域都得到了广泛的应用．文中从树图的布局算法、交互方法、改进和变种、应用领域和用户评价研究等角度，对树图可视化及其扩展方法的基础和研究前沿进行了综述，并对树图可视化方法的前景进行了展望．

英文摘要：

Treemaps are popular visualization methods for hierarchical data with visually encoding the hierarchical property by containment. Because of their space efficiency and interaetivity, Treemaps have been deeply investigated and many variations have emerged. The techniques have also been widely applied in many areas, including scientific, engineering, social, educational and commercial fields. In this survey, we summarize both basic and state-of-the-art researches on Treemaps, including layout algorithms, interaction methods, extensions and variations, applications and user evaluations. Discussion on the future research direction of Treemaps is also presented in this paper.