org.opengis.referencing.cs

Interface CoordinateSystemAxis

All Superinterfaces:

IdentifiedObject

public interface CoordinateSystemAxis
extends IdentifiedObject

Definition of a coordinate system axis. See axis name constraints.

Since:

GeoAPI 1.0

Version:

Abstract specification 2.0

Author:

Martin Desruisseaux (IRD)

See Also:

CoordinateSystem, Unit

Field Summary

Fields inherited from interface org.opengis.referencing.IdentifiedObject

ALIAS_KEY, IDENTIFIERS_KEY, NAME_KEY, REMARKS_KEY

Method Summary

Methods

Modifier and Type	Method and Description
String	getAbbreviation() The abbreviation used for this coordinate system axes.
AxisDirection	getDirection() Direction of this coordinate system axis.
Unit<?>	getUnit() The unit of measure used for this coordinate system axis.

Methods inherited from interface org.opengis.referencing.IdentifiedObject

getAlias, getIdentifiers, getName, getRemarks, toWKT

Method Detail

getAbbreviation

String getAbbreviation()

The abbreviation used for this coordinate system axes. This abbreviation is also used to identify the ordinates in coordinate tuple. Examples are "X" and "Y".

Returns:

The coordinate system axis abbreviation.

getDirection

AxisDirection getDirection()

Direction of this coordinate system axis. In the case of Cartesian projected coordinates, this is the direction of this coordinate system axis locally. Examples: north or south, east or west, up or down. Within any set of coordinate system axes, only one of each pair of terms can be used. For earth-fixed coordinate reference systems, this direction is often approximate and intended to provide a human interpretable meaning to the axis. When a geodetic datum is used, the precise directions of the axes may therefore vary slightly from this approximate direction. Note that an org.opengis.referencing.crs.EngineeringCRS often requires specific descriptions of the directions of its coordinate system axes.

Returns:

The coordinate system axis direction.

getUnit

Unit<?> getUnit()

The unit of measure used for this coordinate system axis. The value of this coordinate in a coordinate tuple shall be recorded using this unit of measure, whenever those coordinates use a coordinate reference system that uses a coordinate system that uses this axis.

Returns:

The coordinate system axis unit.