org.opengis.metadata.extent
Interface VerticalExtent

@UML(identifier="EX_VerticalExtent",
     specification=ISO_19115)
public interface VerticalExtent

Vertical domain of dataset.

Since:

GeoAPI 1.0

Version:

ISO 19115

Method Summary

Double	getMaximumValue() Returns the highest vertical extent contained in the dataset.
Double	getMinimumValue() Returns the lowest vertical extent contained in the dataset.
VerticalCRS	getVerticalCRS() Provides information about the vertical coordinate reference system to which the maximum and minimum elevation values are measured.

Method Detail

getMinimumValue

@UML(identifier="minimumValue",
     obligation=MANDATORY,
     specification=ISO_19115)
Double getMinimumValue()

Returns the lowest vertical extent contained in the dataset.

Returns:

Double mandatory for valid content, may be null for an invalid document.

getMaximumValue

@UML(identifier="maximumValue",
     obligation=MANDATORY,
     specification=ISO_19115)
Double getMaximumValue()

Returns the highest vertical extent contained in the dataset.

Returns:

Double mandatory for valid content, may be null for an invalid document.

getVerticalCRS

@UML(identifier="verticalCRS",
     obligation=MANDATORY,
     specification=ISO_19115)
VerticalCRS getVerticalCRS()

Provides information about the vertical coordinate reference system to which the maximum and minimum elevation values are measured. The CRS identification includes unit of measure.

Returns:

The vertical CRS.

Since:

GeoAPI 2.1

Departure from ISO specification:

ISO 19115 specifies a generic Coordinate Reference System instead than the more restrictive Vertical CRS. It may be because ISO 19111 does not allows vertical CRS to express height above the ellipsoid, so the full three-dimensional Geographic CRS is needed in such case. However GeoAPI allows such vertical CRS since it imported the ellipsoidal vertical datum type from OGC 01-009. Giving this capability, this method returns a vertical CRS in accordance with the method name, documentation and historical version of ISO 19115 which used vertical datum.