16.2 The OpenGIS Geometry Model|無料CGI PHPサイト(新着情報、営業日カレンダーなど)

16.2. The OpenGIS Geometry Model

16.2.1. The Geometry Class Hierarchy
16.2.2. Class Geometry
16.2.3. Class Point
16.2.4. Class Curve
16.2.5. Class LineString
16.2.6. Class Surface
16.2.7. Class Polygon
16.2.8. Class GeometryCollection
16.2.9. Class MultiPoint
16.2.10. Class MultiCurve
16.2.11. Class MultiLineString
16.2.12. Class MultiSurface
16.2.13. Class MultiPolygon

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:

It is associated with a Spatial Reference System, which describes the coordinate space in which the object is defined.
It belongs to some geometry class.

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16.2. The OpenGIS Geometry Model