visad.data.vis5d

Class Vis5DVerticalSystem.Vis5DVerticalCoordinateSystem

java.lang.Object

visad.CoordinateSystem

visad.data.vis5d.Vis5DVerticalSystem.Vis5DVerticalCoordinateSystem

All Implemented Interfaces:

Serializable

Enclosing class:

Vis5DVerticalSystem

public static class Vis5DVerticalSystem.Vis5DVerticalCoordinateSystem
extends CoordinateSystem

Vis5DVerticalCoordinateSystem is the VisAD class for coordinate systems for transforming pressure in millibars to Altitude in m. It uses the standard Vis5D climate formulas:

         P = 1012.5 * e^( H / -7.2 )        (^ denotes exponentiation)
 
         H = -7.2 * Ln( P / 1012.5 )        (Ln denotes natural log)
 

for the transformations (in this case H is in km).

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
Vis5DVerticalCoordinateSystem() Construct a new vertical transformation system

Method Summary

Modifier and Type	Method and Description
static double	altitudeToPressure(double alt) Converts an altitude value in meters to a pressure value in millibars.
boolean	equals(Object o) Checks the equality of o against this coordinate system
double[][]	fromReference(double[][] alts) Converts altitudes in m to pressure in millibars.
float[][]	fromReference(float[][] alts) Converts altitudes in m to pressure in millibars.
static double	pressureToAltitude(double pressure) Converts a pressure value in millibars to an altitude in meters.
double[][]	toReference(double[][] pressures) Converts pressures in millibars to altitude in meters.
float[][]	toReference(float[][] pressures) Converts pressures in millibars to altitude in meters.

Methods inherited from class visad.CoordinateSystem

canConvert, fromReference, fromReference, getCoordinateSystemUnits, getDimension, getReference, getReferenceUnits, toReference, toReference, transformCoordinates, transformCoordinates, transformCoordinates, transformCoordinates, transformCoordinatesFreeUnits, transformCoordinatesFreeUnits

Methods inherited from class java.lang.Object

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

Constructor Detail

Vis5DVerticalCoordinateSystem

public Vis5DVerticalCoordinateSystem()
                              throws VisADException

Construct a new vertical transformation system

Throws:

VisADException

Method Detail

toReference

public double[][] toReference(double[][] pressures)
                       throws VisADException

Converts pressures in millibars to altitude in meters.

Specified by:

toReference in class CoordinateSystem

Parameters:

pressures - array of pressures

Returns:

array of corresponding altitudes

Throws:

VisADException - illegal input

fromReference

public double[][] fromReference(double[][] alts)
                         throws VisADException

Converts altitudes in m to pressure in millibars.

Specified by:

fromReference in class CoordinateSystem

Parameters:

alts - array of altitudes

Returns:

array of corresponding pressures

Throws:

VisADException - illegal input

toReference

public float[][] toReference(float[][] pressures)
                      throws VisADException

Converts pressures in millibars to altitude in meters.

Overrides:

toReference in class CoordinateSystem

Parameters:

pressures - array of pressures

Returns:

array of corresponding altitudes

Throws:

VisADException - illegal input

fromReference

public float[][] fromReference(float[][] alts)
                        throws VisADException

Converts altitudes in m to pressure in millibars.

Overrides:

fromReference in class CoordinateSystem

Parameters:

alts - array of altitudes

Returns:

array of corresponding pressures

Throws:

VisADException - illegal input

equals

public boolean equals(Object o)

Checks the equality of o against this coordinate system

Specified by:

equals in class CoordinateSystem

Parameters:

o - object in question

Returns:

true if o is a Vis5DVerticalCoordinateSystem

altitudeToPressure

public static double altitudeToPressure(double alt)

Converts an altitude value in meters to a pressure value in millibars. It uses the standard Vis5D climate formula:

         P = 1012.5 * e^( H / -7.2 )     (^ denotes exponentiation)

 (H is in km in this formula, but input value is meters)
 

Parameters:

alt - value to convert

Returns:

corresponding pressure value

pressureToAltitude

public static double pressureToAltitude(double pressure)

Converts a pressure value in millibars to an altitude in meters. It uses the standard Vis5D climate formula:

         H = -7.2 * Ln( P / 1012.5 )        (Ln denotes natural log)

 (H is in km in this formula, but returned value is meters)
 

Parameters:

pressure - value to convert

Returns:

corresponding altitude value