net.talvi.puffinplot.data

Class VGP

java.lang.Object

net.talvi.puffinplot.data.VGP

public class VGP
extends java.lang.Object

A class representing a virtual geomagnetic pole.

This class can calculate a VGP from a site direction and position, along with the associated confidence region. For details on the calculation technique and on palaeomagnetic poles in general, see Chapter 7 of Robert F. Butler (1992), Paleomagnetism: Magnetic Domains to Geologic Terranes. Oxford: Blackwell Scientific.

Method Summary

Modifier and Type	Method and Description
static VGP	calculate(FisherParams parameters, Location site) Calculate a VGP for the given direction and location.
double	getDm()
double	getDp()
static java.util.List<java.lang.String>	getEmptyFields() Returns a list of empty strings equal in length to the number of parameters.
static java.util.List<java.lang.String>	getHeaders() Returns the headers describing the parameters as a list of strings.
Location	getLocation()
java.util.List<java.lang.String>	toStrings() Returns the VGP parameters as a list of strings.

Methods inherited from class java.lang.Object

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

Method Detail

calculate

public static VGP calculate(FisherParams parameters,
                            Location site)

Calculate a VGP for the given direction and location. The 95% confidence ellipse will also be calculated, using the a95 value from the Fisher parameters.

Parameters:

parameters - direction and a95 at sample site

site - location of sample site

Returns:

the VGP for the given direction and location

getHeaders

public static java.util.List<java.lang.String> getHeaders()

Returns the headers describing the parameters as a list of strings.

Returns:

the headers describing the parameters

getEmptyFields

public static java.util.List<java.lang.String> getEmptyFields()

Returns a list of empty strings equal in length to the number of parameters.

Returns:

a list of empty strings equal in length to the number of parameters

toStrings

public java.util.List<java.lang.String> toStrings()

Returns the VGP parameters as a list of strings. The order of the parameters is the same as the order of the headers provided by getHeaders().

Returns:

the VGP parameters as a list of strings

getDp

public double getDp()

Returns:

dp, the angular length of the semi-axis of the ellipse of confidence along the site-to-pole great circle

getDm

public double getDm()

Returns:

dm, the angular length of the semi-axis of the ellipse of confidence perpendicular the site-to-pole great circle.

getLocation

public Location getLocation()

Returns:

the location of this VGP