The **geometry** and **geography** data types support sixteen spatial data objects, or instance types. However, only eleven of these instance types are *instantiable*; you can create and work with these instances (or instantiate them) in a database. These instances derive certain properties from their parent data types that distinguish them as **Points**, **LineStrings, CircularStrings**, **CompoundCurves**, **Polygons**, **CurvePolygons** or as multiple **geometry** or **geography** instances in a **GeometryCollection**. **Geography** type has an additional instance type, **FullGlobe**.
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