Creating a feature requires that you also create a geometry, such as a point or line, and associate it with the feature.
创建一个特性还需要创建一个几何形状，比如一个点或线，并将它与此特性相关联。
Creating and using geometry values such as points requires the DB2 Spatial Extender.
创建和使用几何值(比如点)需要DB 2 Spatial Extender。
The creating of regular geometry model takes use of modeling tool provided by 3d design software, but it needs simplifying the model.
规则几何体模型的建立可以直接使用三维设计软件提供的建模工具，但是需要注意精简模型。
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