Finally, the time is signed on entity and record, and non-topological data model is adopted to organize spatial data.

时间标记在实体和元组级上，空间数据采用非拓扑数据模型。

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At present, there isn't a clear definition and description of spatiotemporal topological relationships which is a conceptual and formal basis of spatiotemporal data model.

目前，国际上对于作为时空数据模型概念和形式化基础的时空拓扑关系定义和描述还没有一个明确的阐述。

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The experiments showed that the model can work efficiently and practically, and keep the topological insistency of the vector spatial data.

实验表明，该模型不仅可行，而且高效，并保持了空间要素和要素之间的几何拓扑一致性。

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