关键词: 专题地图, 属性信息, TreeMap, 空间认知, 自适应可视化

Abstract: The structure of socio-economic information usually acts as the main representation object in thematic mapping. Traditionally the statistical chart of thematic map can only visualize the hierarchical component information at a single level, such as the percentage. In this study, a method for the LOD visualization of attribute information in thematic maps is proposed. The new hierarchical information visualization tool, namely the TreeMap in computer graphics field, is used to carry out the multi-level display of attribute information. The presented approach is able to adjust the level of structural details of the attribute information when changing the scale of thematic map. This study combines the Cartogram mapping model with TreeMap to establish the spatial location of the multi-level attribute information considering the topological properties among region polygons. This method provides the users with the strategy to visualize and cognize the attribute information at multi-levels.

Key words: thematic map, attribute information, TreeMap, spatial cognition, adaptive visualization