In spatiotemporal database, geographic entity model includes spatial and temporal information of geographic object.
在时空数据库中，地理实体模型包括地理对象空间信息和时态信息。
The paper studies fuzzy characters about fuzzy geographic entities such as fuzzy point entity, fuzzy line entity and fuzzy surface entity, and discusses the representation about fuzzy entities.
对模糊地理实体的点实体、线实体和面实体的模糊性进行了研究，就它们的模糊表示进行了阐述。
In this scene system, Derive ocean geographic information database from actual electronic chart data, and according to these database build ocean terrain and entity model database.
本视景系统从真实的电子海图数据中提取海洋地理信息数据库，并根据这些数据库建立海洋地形模型利实体模型库。
In this scene system, Derive ocean geographic information database from actual electronic chart data, and according to these database build ocean terrain and entity model database.
本视景系统从真实的电子海图数据中提取海洋地理信息数据库，并根据这些数据库建立海洋地形模型利实体模型库。
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