Class EquidistantConic

All Implemented Interfaces:
Serializable, MathTransform, MathTransform2D

public class EquidistantConic extends MapProjection
Equidistant Conic Projection.

NOTE: formulae used below are from a port, to Java, of the proj4 package of the USGS survey. USGS work is acknowledged here.

References:

  • Proj-4.4.7 available at trac.osgeo.org/proj/.
    Relevant files are: PJ_eqdc.c, pj_mlfn.c, pj_msfn.c, pj_fwd.c and pj_inv.c.
Since:
2.6.1
Author:
Ivan Boldyrev
See Also:
  • Constructor Details

  • Method Details

    • getParameterDescriptors

      public ParameterDescriptorGroup getParameterDescriptors()
      Returns the parameter descriptors for this map projection. This is used for a providing a default implementation of MapProjection.getParameterValues(), as well as arguments checking.
      Specified by:
      getParameterDescriptors in class MapProjection
      Returns:
      The parameter descriptors for this math transform, or null.
      See Also:
    • getParameterValues

      public ParameterValueGroup getParameterValues()
      Returns the parameter values for this map projection.
      Overrides:
      getParameterValues in class MapProjection
      Returns:
      A copy of the parameter values for this map projection.
      See Also:
    • transformNormalized

      protected Point2D transformNormalized(double x, double y, Point2D ptDst) throws ProjectionException
      Transforms the specified (λ,φ) coordinates (units in radians) and stores the result in ptDst (linear distance on a unit sphere).
      Specified by:
      transformNormalized in class MapProjection
      Parameters:
      x - The longitude of the coordinate, in radians.
      y - The latitude of the coordinate, in radians.
      ptDst - the specified coordinate point that stores the result of transforming ptSrc, or null. Ordinates will be in a dimensionless unit, as a linear distance on a unit sphere or ellipse.
      Returns:
      the coordinate point after transforming (lambda, phi) and storing the result in ptDst.
      Throws:
      ProjectionException - if the point can't be transformed.
    • inverseTransformNormalized

      protected Point2D inverseTransformNormalized(double x, double y, Point2D ptDst) throws ProjectionException
      Transforms the specified (x,y) coordinates and stores the result in ptDst.
      Specified by:
      inverseTransformNormalized in class MapProjection
      Parameters:
      x - The easting of the coordinate, linear distance on a unit sphere or ellipse.
      y - The northing of the coordinate, linear distance on a unit sphere or ellipse.
      ptDst - the specified coordinate point that stores the result of transforming ptSrc, or null. Ordinates will be in radians.
      Returns:
      the coordinate point after transforming x, y and storing the result in ptDst.
      Throws:
      ProjectionException - if the point can't be transformed.