MySQL Reference Manual for version 4.0.18.

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17.2 The OpenGIS Geometry Model

The set of geometry types proposed by OGC's SQL with Geometry Types environment is based on the OpenGIS Geometry Model. In this model, each geometric object has the following general properties:

17.2.1 The Geometry Class Hierarchy  
17.2.2 Class Geometry  
17.2.3 Class Point  
17.2.4 Class Curve  
17.2.5 Class LineString  
17.2.6 Class Surface  
17.2.7 Class Polygon  
17.2.8 Class GeometryCollection  
17.2.9 Class MultiPoint  
17.2.10 Class MultiCurve  
17.2.11 Class MultiLineString  
17.2.12 Class MultiSurface  
17.2.13 Class MultiPolygon  



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