org.apache.sis.referencing

Enum CommonCRS.Vertical

Object

Enum<CommonCRS.Vertical>

CommonCRS.Vertical

All Implemented Interfaces:

Serializable, Comparable<CommonCRS.Vertical>

Enclosing class:

CommonCRS

public static enum CommonCRS.Vertical
extends Enum<CommonCRS.Vertical>

Frequently-used vertical CRS and datum that are guaranteed to be available in SIS. Methods in this enumeration are shortcuts for object definitions in the EPSG database. If there is no EPSG database available, or if the query failed, or if there is no EPSG definition for an object, then Vertical fallback on hard-coded values. Consequently, those methods never return null.

Referencing objects are cached after creation. Invoking the same method on the same Vertical instance twice will return the same Identified­Object instance, unless the internal cache has been cleared (e.g. the application is running in a container environment and some modules have been installed or uninstalled).

Example: the following code fetches a vertical Coordinate Reference System for heights above the Mean Sea Level (MSL):

VerticalCRS crs = CommonCRS.Vertical.MEAN_SEA_LEVEL.crs();

Below is an alphabetical list of object names available in this enumeration:

Geodetic objects accessible by enumeration constants

Name or alias	Object type	Enumeration value
Barometric altitude	CRS, Datum	BAROMETRIC
Mean Sea Level	Datum	MEAN_SEA_LEVEL
Mean Sea Level depth	CRS	DEPTH
Mean Sea Level height	CRS	MEAN_SEA_LEVEL
NAVD88 height	CRS	NAVD88
North American Vertical Datum 1988	Datum	NAVD88
Other surface	CRS, Datum	OTHER_SURFACE

Note: We do not provide a GEOIDAL value because its definition depends on the realization epoch. For example EGM84, EGM96 and EGM2008 are applications of three different geoid models on the WGS 84 ellipsoid. The MEAN_SEA_LEVEL value can be used instead as an approximation of geoidal heights.

Since:

0.4

See Also:

Common­Authority­Factory

Defined in the sis-referencing module

Enum Constant Summary

Enum Constants

Enum Constant and Description
BAROMETRIC Height measured by atmospheric pressure in hectopascals (hPa).
DEPTH Depth measured below the Mean Sea Level (MSL) in metres.
ELLIPSOIDAL Height measured along the normal to the ellipsoid used in the definition of horizontal datum.
MEAN_SEA_LEVEL Height measured above the Mean Sea Level (MSL) in metres.
NAVD88 North American Vertical Datum 1988 height.
OTHER_SURFACE Height measured above other kind of surface, for example a geological feature.

Method Summary

Modifier and Type	Method and Description
VerticalCRS	crs() Returns the coordinate reference system associated to this vertical object.
VerticalDatum	datum() Returns the datum associated to this vertical object.
static CommonCRS.Vertical	valueOf(String name) Returns the enum constant of this type with the specified name.
static CommonCRS.Vertical[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class Enum

clone, compare­To, equals, finalize, get­Declaring­Class, hash­Code, name, ordinal, to­String, value­Of

Methods inherited from class Object

get­Class, notify, notify­All, wait, wait, wait

Enum Constant Detail

BAROMETRIC

public static final CommonCRS.Vertical BAROMETRIC

Height measured by atmospheric pressure in hectopascals (hPa). Hectopascals are the units of measurement used by the worldwide meteorological community. The datum is not specific to any location or epoch.

See Also:

Vertical­Datum­Type.BAROMETRIC

MEAN_SEA_LEVEL

public static final CommonCRS.Vertical MEAN_SEA_LEVEL

Height measured above the Mean Sea Level (MSL) in metres. Can be used as an approximation of geoidal heights (height measured above an equipotential surface), except that MSL are not specific to any location or epoch.

EPSG identifiers:	5714 (datum: 5100)
Primary names:	"MSL height" (datum: "Mean Sea Level")
Abbreviations or aliases:	"mean sea level height" (datum: "MSL")
Direction:	AxisDirection.UP
Unit:	Units.METRE

See Also:

Vertical­Datum­Type.GEOIDAL

DEPTH

public static final CommonCRS.Vertical DEPTH

Depth measured below the Mean Sea Level (MSL) in metres.

EPSG identifiers:	5715 (datum: 5100)
Primary names:	"MSL depth" (datum: "Mean Sea Level")
Abbreviations or aliases:	"mean sea level depth" (datum: "MSL")
Direction:	AxisDirection.DOWN
Unit:	Units.METRE

See Also:

Vertical­Datum­Type.GEOIDAL

NAVD88

public static final CommonCRS.Vertical NAVD88

North American Vertical Datum 1988 height.

WMS identifier:	CRS:88
EPSG identifiers:	5703 (datum: 5103)
Primary names:	"NAVD88 height" (datum: "North American Vertical Datum 1988")
Abbreviations or aliases:	" North American Vertical Datum of 1988 height (m)" (datum: "NAVD88")
Direction:	AxisDirection.UP
Unit:	Units.METRE

Since:

0.7

See Also:

Common­CRS.NAD83

ELLIPSOIDAL

public static final CommonCRS.Vertical ELLIPSOIDAL

Height measured along the normal to the ellipsoid used in the definition of horizontal datum. The unit of measurement is metres.

Ellipsoidal height is not part of ISO 19111 international standard. Such vertical CRS is usually not recommended since ellipsoidal heights make little sense without their (latitude, longitude) locations. The ISO specification defines instead three-dimensional Geographic­CRS for that reason. Users are encouraged to avoid this orphan ellipsoidal height as much as possible.

OTHER_SURFACE

public static final CommonCRS.Vertical OTHER_SURFACE

Height measured above other kind of surface, for example a geological feature. The unit of measurement is metres.

See Also:

Vertical­Datum­Type.OTHER_SURFACE

Method Detail

values

public static CommonCRS.Vertical[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (CommonCRS.Vertical c : CommonCRS.Vertical.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static CommonCRS.Vertical valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

Illegal­Argument­Exception - if this enum type has no constant with the specified name

Null­Pointer­Exception - if the argument is null

crs

public VerticalCRS crs()

Returns the coordinate reference system associated to this vertical object. The following table summarizes the CRS known to this class, together with an enumeration value that can be used for fetching that CRS:

Commonly used vertical CRS

Name or alias	Enum	EPSG
Barometric altitude	BAROMETRIC
Mean Sea Level depth	DEPTH	5715
Mean Sea Level height	MEAN_SEA_LEVEL	5714
Other surface	OTHER_SURFACE

Returns:

the CRS associated to this enum.

See Also:

Default­Vertical­CRS

datum

public VerticalDatum datum()

Returns the datum associated to this vertical object. The following table summarizes the datum known to this class, together with an enumeration value that can be used for fetching that datum:

Commonly used vertical datum

Name or alias	Enum	EPSG
Barometric altitude	BAROMETRIC
Mean Sea Level	MEAN_SEA_LEVEL	5100
Other surface	OTHER_SURFACE

Returns:

the datum associated to this enum.

See Also:

Default­Vertical­Datum