空间方向关系是一类描述空间目标间位置分布的基本空间约束。
Spatial directional relation is one of the basic spatial constraints which represent geometric distribution relations of spatial objects.
对空间方向关系的分类等基本问题的研究可望逐步解决其形式化描述模型的建立问题。
The study of the classification about spatial direction relationships may progressively solve the problem of establishing the formal direction relation model.
对空间关系表示的研究主要包括空间拓扑关系、空间方向关系、空间距离关系三大类空间关系表示的研究。
Research on spatial relation representation mainly includes spatial topological relation, spatial cardinal direction relation and spatial distance relation.
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