情境模型理论认为人们在理解信息的过程中至少需要建构5个维度，即：（1）空间，（2）时间，（3）实体，（4）因果，（5）目的等。
The theory of SM believes that the representation of SM concerns at least five dimensions, such as (1) space, (2) time, (3) entity, (4) causality and (5) intention.
对于模型空间中的任何形状的实体都可以由八叉树法分割的立方体序列来表示。
The entities of any shape for model space can all be denoted by intersected cube sequence by octrees.
由于其海量和非结构化等特征，实体对象层次模型、群集多服务器体系被提出用以集成并实施高效的空间数据管理。
Because it's massive and unstructured, Feature-Oriented Object Level (FOOL) and Multi-servers cluster system are used to integrate and manage spatial data effectively.
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