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。
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。
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