Abstract: Existing direction relation representation method can not represent the internal spatial direction of the minimum bounding box. Aiming at this shortage, this paper presents a 3DR44 direction relation representation model. It gives the dynamic direction adjacent relations and the bidirectional mapping relations of the 3DR44 direction relations model. The orderly sequences of the intersection pairs are used to deal with and distinguish the complex direction relations. The direction relations model in the 2D space can be used to handle the 3DR44 direction relations in the 3D space. Application results show that the model can enhance the ability to represent the 3D direction relation of the spatial database.

Key words: three dimensional space, intersection sequence, direction relation, adjacent relation

摘要： 现有方向关系模型无法表示参照对象的最小包围盒的内部空间方向。针对该不足，提出3DR44方向关系表示模型，给出动态邻接关系以及双向映射关系，利用交集对的有序序列处理特定目标对象与参照对象间的复杂方向关系，并将该模型转化为二维空间中的方向关系模型进行处理。应用结果表明，该模型可增强空间数据库表示三维空间对象方向关系的能力。

关键词: 三维空间, 交集序列, 方向关系, 邻接关系

CLC Number: 

• TP393