mccombe.mapping

Class BMN

java.lang.Object

mccombe.mapping.CoordinateSystem

mccombe.mapping.Projection

mccombe.mapping.TransverseMercator

mccombe.mapping.BMN

Direct Known Subclasses:

AustrianM28, AustrianM31, AustrianM34

public abstract class BMN
extends TransverseMercator

Abstract base class for the Austrian BMN (Bundesmeldnetz) coordinate system

Field Summary

Fields

Modifier and Type	Field and Description
protected java.lang.String	zonename

Fields inherited from class mccombe.mapping.TransverseMercator

northernHemisphere, zone

Fields inherited from class mccombe.mapping.CoordinateSystem

locus, ref, sph

Constructor Summary

Constructors

Constructor and Description
BMN(ENPair en, Ellipsoid e, Datum d)
BMN(Position p, Ellipsoid e, Datum d)

Method Summary

Modifier and Type	Method and Description
Datum	defaultDatum() Get the defaul Datum for an instance of CoordinateSystem.
Ellipsoid	defaultEllipsoid() The default Ellipsoid used by instances of this CoordinateSystem For example, a CoordinateSystem of type OSGB has the AirySphere as its default Ellipsoid
double	f0() The scale factor on the Central Meridian.
double	n0() n0() defines the "false northing" distance of the projection.
double	phi0() phi0() defines the latitude of the true origin of the projection.
java.lang.String	toString() Provide a String representation of this UTM point in UTM coordinates

Methods inherited from class mccombe.mapping.TransverseMercator

e0, gridConvergence, lamda0, pointScaleFactor, toEN

Methods inherited from class mccombe.mapping.CoordinateSystem

getDatum, getEllipsoid, getName, getPosition, getWGS84, parseDouble, toLatLong, toLatLongString

Methods inherited from class java.lang.Object

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

Field Detail

zonename

protected java.lang.String zonename

Constructor Detail

BMN

public BMN(Position p,
           Ellipsoid e,
           Datum d)

BMN

public BMN(ENPair en,
           Ellipsoid e,
           Datum d)

Method Detail

defaultDatum

public Datum defaultDatum()

Description copied from class: CoordinateSystem

Get the defaul Datum for an instance of CoordinateSystem. For example, instances of OSGB usually use the OSGB 1936 datum.

Specified by:

defaultDatum in class CoordinateSystem

Returns:

The default Datum used by this instance of CoordinateSystem

defaultEllipsoid

public Ellipsoid defaultEllipsoid()

Description copied from class: CoordinateSystem

The default Ellipsoid used by instances of this CoordinateSystem For example, a CoordinateSystem of type OSGB has the AirySphere as its default Ellipsoid

Specified by:

defaultEllipsoid in class CoordinateSystem

Returns:

The Ellipsoid used as the deafult for this CoordinateSystem

toString

public java.lang.String toString()

Provide a String representation of this UTM point in UTM coordinates

Specified by:

toString in class CoordinateSystem

Returns:

A UTM coordinate String

f0

public double f0()

The scale factor on the Central Meridian. Generally, Transverse Mercator projections increasingly exaggerate distances further from the central meridian. It is usual to reduce the scale factor at the central meridian to compensate for this effect and optimise the scale over the area of interest.

Specified by:

f0 in class TransverseMercator

Returns:

the value of the ScaleFactor at the central meridian.

n0

public double n0()

n0() defines the "false northing" distance of the projection. False origins are usually used with TM projections to ensure that easting and northing distances are always positive over the area of interest. n0() is used as an offset to the grid so that the "true origin" appears to have a northing value equal to n0().

Specified by:

n0 in class TransverseMercator

Returns:

The false northing distance (double)

phi0

public double phi0()

phi0() defines the latitude of the true origin of the projection. Note, however, that many Transverse Mercator projections employ a false origin. See n0() and e0() .

Specified by:

phi0 in class TransverseMercator

Returns:

The latitude of the true origin (radians)