Abstract: To remedy the deficiency of the existing methods about the 3D direction relations, based on the 3DR44 direction relations model, the 3D dynamic direction relations and the reverse relations are researched emphatically. The dynamic direction relations induced by the change of the shape and size of the reference object are dealt with, the dynamic migratory characteristics of the direction blocks are studied. The complex 3D reverse direction relations are predicted and analyzed, the relevant information of the positive relations and the reverse relations of the direction space elements in the 3DR44 direction relations model are given. Application results show that this research work can enhance the ability to represent the complex 3D direction relations of the spatial database.

Key words: spatial database, direction relation, direction space element, intersection sequence, dynamic migration, dynamic adjacent relation

摘要： 为弥补现有方法在处理3D空间方向关系方面的不足，基于3DR44方向关系模型，对3D动态方向关系和反向关系进行研究。描述3DR44模型下参照对象大小变化对目标对象所处方向空间的动态影响情况，分析方向块的动态性和动态迁移特征。预测与分析复杂3D反向方向关系，给出3DR44模型中基本方向空间元素的正向关系和反向关系的关联信息。理论分析与应用结果表明，该研究可较大程度地增强空间数据库对复杂3D方向关系的表示与分析能力。

关键词: 空间数据库, 方向关系, 方向空间元素, 交集序列, 动态迁移, 动态邻接关系

CLC Number: 

• TP311