org.opengis.referencing.cs

Class AxisDirection

Object

CodeList<AxisDirection>

AxisDirection

All Implemented Interfaces:

Serializable, Comparable<AxisDirection>

@UML(identifier="CS_AxisDirection",
     specification=ISO_19111)
public final class AxisDirection
extends CodeList<AxisDirection>

The direction of positive increments in the coordinate value for a coordinate system axis. This direction is exact in some cases, and is approximate in other cases.

Some coordinate systems use non-standard orientations. For example, the first axis in South African grids usually points West, instead of East. This information is obviously relevant for algorithms converting South African grid coordinates into Lat/Long.

Since:

GeoAPI 1.0

Author:

Martin Desruisseaux (IRD)

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static AxisDirection	COLUMN_NEGATIVE Axis positive direction is towards lower pixel column.
static AxisDirection	COLUMN_POSITIVE Axis positive direction is towards higher pixel column.
static AxisDirection	DISPLAY_DOWN Axis positive direction is towards bottom of approximately vertical display surface.
static AxisDirection	DISPLAY_LEFT Axis positive direction is left in display.
static AxisDirection	DISPLAY_RIGHT Axis positive direction is right in display.
static AxisDirection	DISPLAY_UP Axis positive direction is towards top of approximately vertical display surface.
static AxisDirection	DOWN Axis positive direction is down relative to gravity.
static AxisDirection	EAST Axis positive direction is π/2 radians clockwise from north.
static AxisDirection	EAST_NORTH_EAST Axis positive direction is approximately east-north-east.
static AxisDirection	EAST_SOUTH_EAST Axis positive direction is approximately east-south-east.
static AxisDirection	FUTURE Axis positive direction is towards the future.
static AxisDirection	GEOCENTRIC_X Axis positive direction is in the equatorial plane from the centre of the modelled earth towards the intersection of the equator with the prime meridian.
static AxisDirection	GEOCENTRIC_Y Axis positive direction is in the equatorial plane from the centre of the modelled earth towards the intersection of the equator and the meridian π/2 radians eastwards from the prime meridian.
static AxisDirection	GEOCENTRIC_Z Axis positive direction is from the centre of the modelled earth parallel to its rotation axis and towards its north pole.
static AxisDirection	NORTH Axis positive direction is north.
static AxisDirection	NORTH_EAST Axis positive direction is approximately north-east.
static AxisDirection	NORTH_NORTH_EAST Axis positive direction is approximately north-north-east.
static AxisDirection	NORTH_NORTH_WEST Axis positive direction is approximately north-north-west.
static AxisDirection	NORTH_WEST Axis positive direction is approximately north-west.
static AxisDirection	OTHER Unknown or unspecified axis orientation.
static AxisDirection	PAST Axis positive direction is towards the past.
static AxisDirection	ROW_NEGATIVE Axis positive direction is towards lower pixel row.
static AxisDirection	ROW_POSITIVE Axis positive direction is towards higher pixel row.
static AxisDirection	SOUTH Axis positive direction is π radians clockwise from north.
static AxisDirection	SOUTH_EAST Axis positive direction is approximately south-east.
static AxisDirection	SOUTH_SOUTH_EAST Axis positive direction is approximately south-south-east.
static AxisDirection	SOUTH_SOUTH_WEST Axis positive direction is approximately south-south-west.
static AxisDirection	SOUTH_WEST Axis positive direction is approximately south-west.
static AxisDirection	UP Axis positive direction is up relative to gravity.
static AxisDirection	WEST Axis positive direction is 3π/2 radians clockwise from north.
static AxisDirection	WEST_NORTH_WEST Axis positive direction is approximately west-north-west.
static AxisDirection	WEST_SOUTH_WEST Axis positive direction is approximately west-south-west.

Method Summary

Modifier and Type	Method and Description
AxisDirection	absolute() Returns the "absolute" direction of this axis.
AxisDirection[]	family() Returns the list of enumerations of the same kind than this enum.
AxisDirection	opposite() Returns the opposite direction of this axis.
static AxisDirection	valueOf(String code) Returns the axis direction that matches the given string, or returns a new one if none match it.
static AxisDirection[]	values() Returns the list of AxisDirections.

Methods inherited from class CodeList

compareTo, equals, identifier, matches, name, ordinal, readResolve, toString, valueOf

Methods inherited from class Object

clone, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

OTHER

@UML(identifier="CS_AxisOrientationEnum.CS_AO_Other",
     specification=OGC_01009)
public static final AxisDirection OTHER

Unknown or unspecified axis orientation.

NORTH

@UML(identifier="north",
     obligation=CONDITIONAL,
     specification=ISO_19111)
public static final AxisDirection NORTH

Axis positive direction is north. In a geographic or projected CRS, north is defined through the geodetic datum. In an engineering CRS, north may be defined with respect to an engineering object rather than a geographical direction.

NORTH_NORTH_EAST

@UML(identifier="northNorthEast",
     obligation=CONDITIONAL,
     specification=ISO_19111)
public static final AxisDirection NORTH_NORTH_EAST

Axis positive direction is approximately north-north-east.

Since:

GeoAPI 2.0

NORTH_EAST

@UML(identifier="northEast",
     obligation=CONDITIONAL,
     specification=ISO_19111)
public static final AxisDirection NORTH_EAST

Axis positive direction is approximately north-east.

Since:

GeoAPI 2.0

EAST_NORTH_EAST

@UML(identifier="eastNorthEast",
     obligation=CONDITIONAL,
     specification=ISO_19111)
public static final AxisDirection EAST_NORTH_EAST

Axis positive direction is approximately east-north-east.

Since:

GeoAPI 2.0

EAST

@UML(identifier="east",
     obligation=CONDITIONAL,
     specification=ISO_19111)
public static final AxisDirection EAST

Axis positive direction is π/2 radians clockwise from north. This is usually used for Grid X coordinates and Longitude.

EAST_SOUTH_EAST

@UML(identifier="eastSouthEast",
     obligation=CONDITIONAL,
     specification=ISO_19111)
public static final AxisDirection EAST_SOUTH_EAST

Axis positive direction is approximately east-south-east.

Since:

GeoAPI 2.0

SOUTH_EAST

@UML(identifier="southEast",
     obligation=CONDITIONAL,
     specification=ISO_19111)
public static final AxisDirection SOUTH_EAST

Axis positive direction is approximately south-east.

Since:

GeoAPI 2.0

SOUTH_SOUTH_EAST

@UML(identifier="southSouthEast",
     obligation=CONDITIONAL,
     specification=ISO_19111)
public static final AxisDirection SOUTH_SOUTH_EAST

Axis positive direction is approximately south-south-east.

Since:

GeoAPI 2.0

SOUTH

@UML(identifier="south",
     obligation=CONDITIONAL,
     specification=ISO_19111)
public static final AxisDirection SOUTH

Axis positive direction is π radians clockwise from north.

SOUTH_SOUTH_WEST

@UML(identifier="southSouthWest",
     obligation=CONDITIONAL,
     specification=ISO_19111)
public static final AxisDirection SOUTH_SOUTH_WEST

Axis positive direction is approximately south-south-west.

Since:

GeoAPI 2.0

SOUTH_WEST

@UML(identifier="southWest",
     obligation=CONDITIONAL,
     specification=ISO_19111)
public static final AxisDirection SOUTH_WEST

Axis positive direction is approximately south-west.

Since:

GeoAPI 2.0

WEST_SOUTH_WEST

@UML(identifier="westSouthWest",
     obligation=CONDITIONAL,
     specification=ISO_19111)
public static final AxisDirection WEST_SOUTH_WEST

Axis positive direction is approximately west-south-west.

Since:

GeoAPI 2.0

WEST

@UML(identifier="west",
     obligation=CONDITIONAL,
     specification=ISO_19111)
public static final AxisDirection WEST

Axis positive direction is 3π/2 radians clockwise from north. This is usually used for Grid X coordinates and Longitude.

WEST_NORTH_WEST

@UML(identifier="westNorthWest",
     obligation=CONDITIONAL,
     specification=ISO_19111)
public static final AxisDirection WEST_NORTH_WEST

Axis positive direction is approximately west-north-west.

Since:

GeoAPI 2.0

NORTH_WEST

@UML(identifier="northWest",
     obligation=CONDITIONAL,
     specification=ISO_19111)
public static final AxisDirection NORTH_WEST

Axis positive direction is approximately north-west.

Since:

GeoAPI 2.0

NORTH_NORTH_WEST

@UML(identifier="northNorthWest",
     obligation=CONDITIONAL,
     specification=ISO_19111)
public static final AxisDirection NORTH_NORTH_WEST

Axis positive direction is approximately north-north-west.

Since:

GeoAPI 2.0

UP

@UML(identifier="up",
     obligation=CONDITIONAL,
     specification=ISO_19111)
public static final AxisDirection UP

Axis positive direction is up relative to gravity. This is used for vertical coordinate reference systems.

DOWN

@UML(identifier="down",
     obligation=CONDITIONAL,
     specification=ISO_19111)
public static final AxisDirection DOWN

Axis positive direction is down relative to gravity. This is used for vertical coordinate reference systems.

GEOCENTRIC_X

@UML(identifier="geocentricX",
     obligation=CONDITIONAL,
     specification=ISO_19111)
public static final AxisDirection GEOCENTRIC_X

Axis positive direction is in the equatorial plane from the centre of the modelled earth towards the intersection of the equator with the prime meridian.

Since:

GeoAPI 2.0

GEOCENTRIC_Y

@UML(identifier="geocentricY",
     obligation=CONDITIONAL,
     specification=ISO_19111)
public static final AxisDirection GEOCENTRIC_Y

Axis positive direction is in the equatorial plane from the centre of the modelled earth towards the intersection of the equator and the meridian π/2 radians eastwards from the prime meridian.

Since:

GeoAPI 2.0

GEOCENTRIC_Z

@UML(identifier="geocentricZ",
     obligation=CONDITIONAL,
     specification=ISO_19111)
public static final AxisDirection GEOCENTRIC_Z

Axis positive direction is from the centre of the modelled earth parallel to its rotation axis and towards its north pole.

Since:

GeoAPI 2.0

FUTURE

@UML(identifier="future",
     obligation=CONDITIONAL,
     specification=ISO_19111)
public static final AxisDirection FUTURE

Axis positive direction is towards the future. This is used for temporal coordinate reference systems.

PAST

@UML(identifier="past",
     obligation=CONDITIONAL,
     specification=ISO_19111)
public static final AxisDirection PAST

Axis positive direction is towards the past. This is used for temporal coordinate reference systems.

COLUMN_POSITIVE

@UML(identifier="columnPositive",
     obligation=CONDITIONAL,
     specification=ISO_19111)
public static final AxisDirection COLUMN_POSITIVE

Axis positive direction is towards higher pixel column.

Since:

GeoAPI 2.0

COLUMN_NEGATIVE

@UML(identifier="columnNegative",
     obligation=CONDITIONAL,
     specification=ISO_19111)
public static final AxisDirection COLUMN_NEGATIVE

Axis positive direction is towards lower pixel column.

Since:

GeoAPI 2.0

ROW_POSITIVE

@UML(identifier="rowPositive",
     obligation=CONDITIONAL,
     specification=ISO_19111)
public static final AxisDirection ROW_POSITIVE

Axis positive direction is towards higher pixel row.

Since:

GeoAPI 2.0

ROW_NEGATIVE

@UML(identifier="rowNegative",
     obligation=CONDITIONAL,
     specification=ISO_19111)
public static final AxisDirection ROW_NEGATIVE

Axis positive direction is towards lower pixel row.

Since:

GeoAPI 2.0

DISPLAY_RIGHT

@UML(identifier="displayRight",
     obligation=CONDITIONAL,
     specification=ISO_19111)
public static final AxisDirection DISPLAY_RIGHT

Axis positive direction is right in display.

Since:

GeoAPI 2.0

DISPLAY_LEFT

@UML(identifier="displayLeft",
     obligation=CONDITIONAL,
     specification=ISO_19111)
public static final AxisDirection DISPLAY_LEFT

Axis positive direction is left in display.

Since:

GeoAPI 2.0

DISPLAY_UP

@UML(identifier="displayUp",
     obligation=CONDITIONAL,
     specification=ISO_19111)
public static final AxisDirection DISPLAY_UP

Axis positive direction is towards top of approximately vertical display surface.

Since:

GeoAPI 2.0

DISPLAY_DOWN

@UML(identifier="displayDown",
     obligation=CONDITIONAL,
     specification=ISO_19111)
public static final AxisDirection DISPLAY_DOWN

Axis positive direction is towards bottom of approximately vertical display surface.

Since:

GeoAPI 2.0

Method Detail

values

public static AxisDirection[] values()

Returns the list of AxisDirections.

Returns:

The list of codes declared in the current JVM.

family

public AxisDirection[] family()

Returns the list of enumerations of the same kind than this enum.

Specified by:

family in class CodeList<AxisDirection>

Returns:

The codes of the same kind than this code.

opposite

@Extension
public AxisDirection opposite()

Returns the opposite direction of this axis. The opposite direction of North is South, and the opposite direction of South is North. The same applies to East-West, Up-Down and Future-Past, etc. If this axis direction has no opposite, then this method returns null.

Returns:

The opposite direction, or null if none or unknown.

absolute

@Extension
public AxisDirection absolute()

Returns the "absolute" direction of this axis. This "absolute" operation is similar to the Math.abs(int) method in that "negative" directions like (SOUTH, WEST, DOWN, PAST) are changed for their "positive" counterparts (NORTH, EAST, UP, FUTURE). More specifically, the following conversion table is applied:

Direction Absolute value NORTH NORTH SOUTH NORTH EAST EAST WEST EAST UP UP DOWN UP	Direction Absolute value DISPLAY_RIGHT DISPLAY_RIGHT DISPLAY_LEFT DISPLAY_RIGHT DISPLAY_UP DISPLAY_UP DISPLAY_DOWN DISPLAY_UP FUTURE FUTURE PAST FUTURE
OTHER	OTHER

Returns:

The direction from the above table.

valueOf

public static AxisDirection valueOf(String code)

Returns the axis direction that matches the given string, or returns a new one if none match it.

Parameters:

code - The name of the code to fetch or to create.

Returns:

A code matching the given name.