com.partnersoft.v3x.geometry.projections
Class TransverseMercator

java.lang.Object
  com.partnersoft.v3x.geometry.projections.StandardProjection
      com.partnersoft.v3x.geometry.projections.TransverseMercator

All Implemented Interfaces:

Projection, ProjectionConstants

Direct Known Subclasses:

UTM

public class TransverseMercator
extends StandardProjection

Field Summary

Fields inherited from class com.partnersoft.v3x.geometry.projections.StandardProjection

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

Fields inherited from interface com.partnersoft.v3x.geometry.projections.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 (?)
protected void	initializeImp()
DoublePoint	project(double longitude, double latitude) Project from latlong to xy.
DoublePoint	reverse(double x, double y) 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 (?)

Methods inherited from class com.partnersoft.v3x.geometry.projections.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 java.lang.Object

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

Constructor Detail

TransverseMercator

public TransverseMercator()

Method Detail

project

public DoublePoint project(double longitude,
                           double latitude)

Description copied from interface: Projection

Project from latlong to xy.

Specified by:

project in interface Projection

Specified by:

project in class StandardProjection

reverse

public DoublePoint reverse(double x,
                           double y)

Description copied from interface: Projection

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

Specified by:

reverse in interface Projection

Specified by:

reverse in class StandardProjection

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 (?)