cardinal direction relations 空间方向关系
conic direction relations 锥形方向关系
direction relations matrix 方向关系矩阵
spatial direction relations 空间方位关系
inverse direction relations 反方向关系
direction relations' matrix 方向关系矩阵
reasoning of direction relations 方向关系推理
Basing on preceding knowledge, the consistency checking arithmetic for cardinal direction relations of three-dimensional objects and the corresponding correctness proof is given.
在此基础上，讨论三维空间方向关系的基本推理运算、凸关系判断方法及路径一致性检验算法，给出方向关系网络一致性检验算法及其正确性证明。
参考来源 - 基于坐标映射模型的方向关系一致性检验The reasoning of direction relations is described by two rough sets, and the difference set represents the uncertainty of reasoning direction relations.
提出了细节方向关系的不确定性描述方法。
参考来源 - 空间关系模糊描述及组合推理的理论和方法研究·2,447,543篇论文数据，部分数据来源于NoteExpress
Direction relations deal with order in space.
方向关系描述了对象间的空间顺序关系。
Representation of direction relations and the retrieve of such relations based on R-tree;
基于区间值及其运算性质给出了不确定区域间方向关系的表示及推理方法。
However, experts obtain little production about direction relations than topological relations research, and there is scarcely any application applying spatial direction relations into GIS software.
但是，专家们对方位关系的研究与拓扑关系相比成果要少的多，空间方位关系在GIS软件中的应用也寥寥无几。
应用推荐