com.partnersoft.geometry.projection
Class TransverseMercator

java.lang.Object
  com.partnersoft.geometry.projection.Projection
      com.partnersoft.geometry.projection.StandardProjection
          com.partnersoft.geometry.projection.TransverseMercator

All Implemented Interfaces:

Coggable, ProjectionConstants

Direct Known Subclasses:

UTM

public class TransverseMercator
extends StandardProjection

Field Summary

Fields inherited from class com.partnersoft.geometry.projection.StandardProjection

a, b, datum, e, ellipsoid, es, esp, initialized, lam0, NAD27, NAD83, originLatitude, originLongitude, originX, originY, phi0

Fields inherited from interface com.partnersoft.geometry.projection.ProjectionConstants

ATOL, DEG2RAD, EPSILON, FOURTHPI, HALFPI, ONE_TOL, PI, RAD2DEG, TOL, TWOPI

Constructor Summary

TransverseMercator()

Method Summary

protected double	forwardM(double phi, double sphi, double cphi, double[] inCoefficients) Utility functions for calculating M in forward direction.
protected double[]	getCoefficients(double es) Calculate the series expansion.
double	getScaleReduction() Scale reduction (?)
Cog	getState()
protected void	initializeImp()
void	project(Point point) Project from latlong to xy.
void	reverse(Point point) Reverse project from xy to latlong.
protected double	reverseM(double arg, double es, double[] inCoefficients) Utility function for calculating M in the reverse direction.
void	setScaleReduction(double newScaleReduction) Scale reduction (?)
void	setState(Cog newState)

Methods inherited from class com.partnersoft.geometry.projection.StandardProjection

aacos, aasin, aatan2, abs, asin, asqrt, atan, atan2, cos, getDatum, getEllipsoid, getOriginLatitude, getOriginLongitude, getOriginX, getOriginY, gpsToProjection, hypot, initialize, log, pj_enfn, pj_msfn, pj_phi2, pj_qsfn, pj_tsfn, pow, projectionToGPS, setDatum, setEllipsoid, setOriginLatitude, setOriginLongitude, setOriginX, setOriginY, sin, sqrt, tan, toDegrees, toRadians

Methods inherited from class com.partnersoft.geometry.projection.Projection

project, project, projectFeet, projectFeet, projectFeet, reverse, reverse, reverseFeet, reverseFeet, reverseFeet

Methods inherited from class java.lang.Object

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

Constructor Detail

TransverseMercator

public TransverseMercator()

Method Detail

project

public void project(Point point)

Description copied from class: Projection

Project from latlong to xy. Modifies the input Point. Remember that Point.x is longitude, Point.y is latitude.

Specified by:

project in class Projection

reverse

public void reverse(Point point)

Description copied from class: Projection

Reverse project from xy to latlong. Results are returned with point.x = long, point.y = lat. Modifies input.

Specified by:

reverse in class Projection

getCoefficients

protected double[] getCoefficients(double es)

Calculate the series expansion. eSquared = (a^2-b^2)/(a^2) where a and b are the major and minor axes of the ellipsoid in question.

forwardM

protected double forwardM(double phi,
                          double sphi,
                          double cphi,
                          double[] inCoefficients)

Utility functions for calculating M in forward direction. meridinal distance for ellipsoid and inverse 8th degree - accurate to < 1e-5 meters when used in conjuction with typical major axis values.

reverseM

protected double reverseM(double arg,
                          double es,
                          double[] inCoefficients)

Utility function for calculating M in the reverse direction. This is an itterative approach that rairly goes beyond 2 itterations, However it is designed to break at MAX_ITERATIONS and return the best guess at that point. Inverse determines phi to EPS (1e-11) radians, about 1e-6 seconds.

initializeImp

protected void initializeImp()

Specified by:

initializeImp in class StandardProjection

getScaleReduction

public double getScaleReduction()

Scale reduction (?)

setScaleReduction

public void setScaleReduction(double newScaleReduction)

Scale reduction (?)

getState

public Cog getState()

Specified by:

getState in interface Coggable

Overrides:

getState in class StandardProjection

setState

public void setState(Cog newState)

Specified by:

setState in interface Coggable

Overrides:

setState in class StandardProjection