11.4.2 The OpenGIS Geometry ModelOpenGIS几何模型

11.4.2.1 The Geometry Class Hierarchy几何体类层次结构
11.4.2.2 Geometry Class几何体类
11.4.2.3 Point Class点类
11.4.2.4 Curve Class曲线类
11.4.2.5 LineString Class直线串类
11.4.2.6 Surface Class表面类
11.4.2.7 Polygon Class多边形类
11.4.2.8 GeometryCollection Class几何体集合类
11.4.2.9 MultiPoint Class多点类
11.4.2.10 MultiCurve Class多曲线类
11.4.2.11 MultiLineString Class多直线串类
11.4.2.12 MultiSurface Class多表面类
11.4.2.13 MultiPolygon Class多个多边形类

The set of geometry types proposed by OGC's SQL with Geometry Types environment is based on the OpenGIS Geometry Model. OGC的SQL配合几何体类型环境提出的几何类型集是基于OpenGIS几何模型的。In this model, each geometric object has the following general properties:在此模型中，每个几何对象都具有以下一般特性：

11.4.2.1 The Geometry Class Hierarchy
11.4.2.2 Geometry Class
11.4.2.3 Point Class
11.4.2.4 Curve Class
11.4.2.5 LineString Class
11.4.2.6 Surface Class
11.4.2.7 Polygon Class
11.4.2.8 GeometryCollection Class
11.4.2.9 MultiPoint Class
11.4.2.10 MultiCurve Class
11.4.2.11 MultiLineString Class
11.4.2.12 MultiSurface Class
11.4.2.13 MultiPolygon Class