drasys.or.geom.geo.proj
Class Mercator

java.lang.Object
  |
  +--drasys.or.geom.geo.proj.Projection
        |
        +--drasys.or.geom.geo.proj.Mercator

public class Mercator

extends Projection

implements ProjectionI

A class that implements the mercator cylindrical projection. The ellipsoid used for the projection is initialized to the current ellipsoid in 'geo.CoordinateSystem'.

References:

Map Projections : A Reference Manual
    Lev M. Bugayevskiy, John P. Snyder / Hardcover / Published 1995
Flattening the Earth : Two Thousand Years of Map Projections
    John P. Synder, John P. Snyder / Paperback / Published 1997

Fields inherited from class drasys.or.geom.geo.proj.Projection

_e, _e2, _easting, _ellipsoid, _er, _halfE, _northing, _oneMinusE2

 

Constructor Summary

Mercator(double centralMeridian)

Mercator(RangeI range)

 

Method Summary
PointI	forward(PointI point)           Returns a projected point.
double	getCentralMeridian()           Returns the central meridian which is the single parameter for the Mercator projection.
PointI	inverse(PointI point)           Returns an inverse projected point.

 

Methods inherited from class drasys.or.geom.geo.proj.Projection

forward, forwardTransform, forwardTransform, getEasting, getEllipsoid, getNorthing, inputCoordinateSystem, inverse, inverseTransform, inverseTransform, msfn, msfn, outputCoordinateSystem, phi1, phi2, qsfn, setEasting, setEllipsoid, setNorthing, tsfn, tsfn

 

Methods inherited from class java.lang.Object

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

 

Constructor Detail

Mercator

public Mercator(RangeI range)

Mercator

public Mercator(double centralMeridian)

getCentralMeridian

public double getCentralMeridian()

Returns the central meridian which is the single parameter for the Mercator projection.

forward

public PointI forward(PointI point)
               throws GeomException

Returns a projected point. Converts from the 'geo' coordinate system to the 'rect2' coordinate system.

Specified by:

forward in interface ProjectionI

Throws:

GeomException - if the latitude is not strictly greater than -90.0 and less than 90.0.

inverse

public PointI inverse(PointI point)
               throws GeomException

Returns an inverse projected point. Converts from the 'rect2' coordinate system to the 'geo' coordinate system.

Specified by:

inverse in interface ProjectionI