All Known Implementing Classes:

ExtentImpl
```
@UML(identifier="EX_Extent",
     specification=ISO_19115)
public interface Extent
```
Information about spatial, vertical, and temporal extent. This interface has four optional attributes (geographic elements, temporal elements, and vertical elements) and an element called description. At least one of the four shall be used.

Since:

GeoAPI 1.0

Author:

Martin Desruisseaux (IRD)

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`InternationalString`	`getDescription()`	Returns the spatial and temporal extent for the referring object.
`Collection<? extends GeographicExtent>`	`getGeographicElements()`	Provides geographic component of the extent of the referring object
`Collection<? extends TemporalExtent>`	`getTemporalElements()`	Provides temporal component of the extent of the referring object
`Collection<? extends VerticalExtent>`	`getVerticalElements()`	Provides vertical component of the extent of the referring object

Method Detail

getDescription

@UML(identifier="description",
     obligation=CONDITIONAL,
     specification=ISO_19115)
InternationalString getDescription()

Returns the spatial and temporal extent for the referring object.

Returns:: The spatial and temporal extent, or null in none.

getGeographicElements

@UML(identifier="geographicElement",
     obligation=CONDITIONAL,
     specification=ISO_19115)
Collection<? extends GeographicExtent> getGeographicElements()

Provides geographic component of the extent of the referring object

Returns:: The geographic extent, or an empty set if none.

getTemporalElements

@UML(identifier="temporalElement",
     obligation=CONDITIONAL,
     specification=ISO_19115)
Collection<? extends TemporalExtent> getTemporalElements()

Provides temporal component of the extent of the referring object

Returns:: The temporal extent, or an empty set if none.

getVerticalElements

@UML(identifier="verticalElement",
     obligation=CONDITIONAL,
     specification=ISO_19115)
Collection<? extends VerticalExtent> getVerticalElements()

Provides vertical component of the extent of the referring object