Package com.luciad.projection

Class TLcdKrovak

java.lang.Object
com.luciad.projection.ALcdProjection
com.luciad.projection.TLcdKrovak
All Implemented Interfaces:
ILcdProjection, ILcdPropertyChangeSource, Serializable, Cloneable
public class TLcdKrovak extends ALcdProjection implements Cloneable
Krovak Projection

Introduction

A krovak projection is an oblique conic map projection. It superimposes a cone over the sphere of the Earth, with the axis through a defined location, and cutting the ellipsoid minor axis at a defined angle.

Properties

  • Conformal.
  • The scale of the projection is true along the pseudo standard parallel, which forms a complex curve on the ellipsoid.
  • This projection is mainly used in the Czech Republic and Slovakia.

Example

Sample code


 TLcdKrovak projection = new TLcdKrovak(42.5, 49.5, 0.28813972222222, 78.5);

Implementation aspects

The equations of the krovak projection are based on the epsg guidance note 7, part 2

Since:
2020.0
See Also:

  • Constructor Details

    • TLcdKrovak

      public TLcdKrovak()
      Constructs a Krovak projection with the point of origin at (0,0), with and azimuth of 90 degrees and a pseudo standard parallel of 45 degrees.

    • TLcdKrovak

      public TLcdKrovak(double aOriginLon, double aOriginLat, double aAzimuth, double aPseudoStandardParallel)
      Constructs a Krovak projection with the given origin longitude, origin latitude, azimuth and pseudo standard parallel.
      Parameters:
      aOriginLon - the longitude of the point of origin of the projection
      aOriginLat - the latitude of the point of origin of the projection
      aAzimuth - the azimuth in degrees
      aPseudoStandardParallel - the latitude (in degrees) of the pseudo standard parallel

  • Method Details

    • getOrigin

      public ILcdPoint getOrigin()
      Description copied from interface: ILcdProjection
      Origin of the projection is the ILcd2DEditablePoint that corresponds with origin (0, 0) of the cartesian coordinate system of the projection.
      Specified by:
      getOrigin in interface ILcdProjection
      Returns:
      the origin of the projection.

    • getOriginLon

      public double getOriginLon()
      Returns the longitude of the point of origin of the projection.
      Returns:
      the longitude of the point of origin of the projection.

    • setOriginLon

      public void setOriginLon(double aOriginLon)
      Sets the longitude of the point of origin of the projection.
      Parameters:
      aOriginLon - the longitude of the point of origin of the projection

    • getOriginLat

      public double getOriginLat()
      Returns the latitude of the point of origin of the projection.
      Returns:
      the latitude of the point of origin of the projection.

    • setOriginLat

      public void setOriginLat(double aOriginLat)
      Sets the latitude of the point of origin of the projection.
      Parameters:
      aOriginLat - the latitude of the point of origin of the projection

    • getAzimuth

      public double getAzimuth()
      Returns the azimuth at which the axis of the cone, defined by this projection cuts the ellipsoid minor axis.
      Returns:
      the azimuth at which the axis of the cone, defined by this projection cuts the ellipsoid minor axis.

    • setAzimuth

      public void setAzimuth(double aAzimuth)
      Sets the azimuth at which the axis of the cone, defined by this projection cuts the ellipsoid minor axis.
      Parameters:
      aAzimuth - the azimuth (in degrees)

    • getPseudoStandardParallel

      public double getPseudoStandardParallel()
      Returns the parallel on the (north rotated) conformal sphere at which the projection is true to scale. On the ellipsoid, it maps as a complex curve.
      Returns:
      the parallel on the (north rotated) conformal sphere at which the projection is true to scale

    • setPseudoStandardParallel

      public void setPseudoStandardParallel(double aPseudoStandardParallel)
      Sets the parallel on the (north rotated) conformal sphere at which the projection is true to scale. On the ellipsoid, it maps as a complex curve.
      Parameters:
      aPseudoStandardParallel - the parallel that defines the curve on which the scale is true

    • isContinuous

      public boolean isContinuous()
      Description copied from interface: ILcdProjection
      An ILcdProjection is continuous if there are no interruptions in the world coordinates. Most projections are continuous.
      Specified by:
      isContinuous in interface ILcdProjection
      Returns:
      true if the projection is continuous, false otherwise.

    • isAllInBounds

      public boolean isAllInBounds()
      Description copied from interface: ILcdProjection
      If all geodetic coordinates (l ,j ) are projected (visible) by an ILcdProjection and all (x,y ) coordinates are bounded this is true. All ILcdProjection objects have bounded (x,y ) coordinates because the projection is cut off if necessary.
      Specified by:
      isAllInBounds in interface ILcdProjection
      Returns:
      true if all LonLatPoints are within the bounds of the projection, false otherwise.

    • lonlatheight2worldOnEllipsoidSFCT

      public void lonlatheight2worldOnEllipsoidSFCT(ILcdPoint aLLHP, ILcdEllipsoid aEllipsoid, ILcd2DEditablePoint aWorldPoint) throws TLcdOutOfBoundsException
      Description copied from class: ALcdProjection
      Default implementation calls lonlatheight2worldOnEllipsoidSFCT with aEllipsoid.getAuxRadius() as sphere radius.
      Specified by:
      lonlatheight2worldOnEllipsoidSFCT in interface ILcdProjection
      Overrides:
      lonlatheight2worldOnEllipsoidSFCT in class ALcdProjection
      Parameters:
      aLLHP - point to be projected.
      aEllipsoid - ellipsoid on which the point is defined.
      aWorldPoint - projected point as side effect.
      Throws:
      TLcdOutOfBoundsException - If the ILcdPoint aLLHP is not within the valid area of the projection (visible area), then this exception is thrown.

    • world2lonlatOnEllipsoidSFCT

      public void world2lonlatOnEllipsoidSFCT(ILcdPoint aXYPoint, ILcdEllipsoid aEllipsoid, ILcd2DEditablePoint aLLPSFCT) throws TLcdOutOfBoundsException
      Description copied from class: ALcdProjection
      Default implementation calls world2lonlatOnSphereSFCT with aEllipsoid.getAuxRadius() as sphere radius.
      Specified by:
      world2lonlatOnEllipsoidSFCT in interface ILcdProjection
      Overrides:
      world2lonlatOnEllipsoidSFCT in class ALcdProjection
      Parameters:
      aXYPoint - projected point for which the corresponding geodetic point is sought.
      aEllipsoid - ellipsoid on which the geodetic coordinate is defined.
      aLLPSFCT - resulting geodetic coordinate as side effect.
      Throws:
      TLcdOutOfBoundsException - If the ILcdPoint aXYPoint is not within the valid area of the projection (visible area), then this exception is thrown.

    • inWorldBoundsOnEllipsoid

      public boolean inWorldBoundsOnEllipsoid(ILcdPoint aXYPoint, ILcdEllipsoid aEllipsoid)
      Description copied from class: ALcdProjection
      Default implementation calls inWorldBoundsOnSphere with aEllipsoid.getAuxRadius() as sphere radius.
      Specified by:
      inWorldBoundsOnEllipsoid in interface ILcdProjection
      Overrides:
      inWorldBoundsOnEllipsoid in class ALcdProjection
      Parameters:
      aXYPoint - point to be checked upon.
      aEllipsoid - ellipsoid on which the geodetic coordinate is defined.
      Returns:
      true if valid, false if invalid.
      See Also:

    • world2DEditableBoundsOnEllipsoidSFCT

      public void world2DEditableBoundsOnEllipsoidSFCT(ILcdEllipsoid aEllipsoid, ILcd2DEditableBounds aWorldBoundsSFCT)
      Description copied from class: ALcdProjection
      Default implementation calls world2lonlatOnSphereSFCT with aEllipsoid.getAuxRadius() as sphere radius.
      Specified by:
      world2DEditableBoundsOnEllipsoidSFCT in interface ILcdProjection
      Overrides:
      world2DEditableBoundsOnEllipsoidSFCT in class ALcdProjection
      Parameters:
      aEllipsoid - ellipsoid considered.
      aWorldBoundsSFCT - the bounds of the projection in world coordinates as side effect.

    • inLonLatBounds

      public boolean inLonLatBounds(ILcdPoint aLLP)
      Description copied from interface: ILcdProjection
      Checks if an ILcdPoint is inside the valid area of geodetic coordinates of the projection. The valid area is determined by the LonLatPoints that are visible and for which the corresponding cartesian coordinate is within the boundaries.
      Specified by:
      inLonLatBounds in interface ILcdProjection
      Parameters:
      aLLP - ILcdPoint to be checked upon.
      Returns:
      true if valid, false if invalid.

    • boundaryLons

      public double[][] boundaryLons(double lat)
      Description copied from class: ALcdProjection
      Default implementation. To be redefined for specific projections.
      Specified by:
      boundaryLons in interface ILcdProjection
      Overrides:
      boundaryLons in class ALcdProjection
      Parameters:
      lat - latitude in decimal degrees and -90.0 <= aLat<= 90.0.
      Returns:
      the array of pairs of longitudes[0] and longitudes[1], where the closed interval longitudes[0] -> longitudes[1] is in visible area and -180.0 <= lon[i] <= 180.0.

    • boundaryLats

      public double[][] boundaryLats(double lon)
      Description copied from class: ALcdProjection
      Default implementation. To be redefined for specific projections.
      Specified by:
      boundaryLats in interface ILcdProjection
      Overrides:
      boundaryLats in class ALcdProjection
      Parameters:
      lon - longitude in decimal degrees -180.0 <= lon <= 180.0 .
      Returns:
      the array of pairs of latitudes lats[0] and lats[1], where the closed interval lats[0] -> lats[1] is in visible area and -90.0 <= lats[i] <= 90.0 .

    • lonlatheight2worldOnSphereSFCT

      public void lonlatheight2worldOnSphereSFCT(ILcdPoint aLLHP, double aRadius, ILcd2DEditablePoint aWorldPoint) throws TLcdOutOfBoundsException
      Description copied from interface: ILcdProjection
      Transforms an ILcd2DEditablePoint on a sphere into the cartesian coordinate system of the projection.
      Specified by:
      lonlatheight2worldOnSphereSFCT in interface ILcdProjection
      Parameters:
      aLLHP - point to be projected.
      aRadius - radius of the sphere (meters).
      aWorldPoint - projected point as side effect.
      Throws:
      TLcdOutOfBoundsException - If the ILcdPoint aLLHP is not within the valid area of the projection (visible area), then this exception is thrown.

    • world2lonlatOnSphereSFCT

      public void world2lonlatOnSphereSFCT(ILcdPoint aXYPoint, double aRadius, ILcd2DEditablePoint aLLPSFCT) throws TLcdOutOfBoundsException
      Description copied from interface: ILcdProjection
      Transforms an ILcdPoint from the cartesian coordinate system of the projection into an ILcd2DEditablePoint onto a sphere.
      Specified by:
      world2lonlatOnSphereSFCT in interface ILcdProjection
      Parameters:
      aXYPoint - projected point for which the corresponding geodetic point is sought.
      aRadius - radius of the sphere (meters).
      aLLPSFCT - resulting geodetic coordinate as side effect.
      Throws:
      TLcdOutOfBoundsException - If the ILcdPoint aXYPoint is not within the valid area of the projection (visible area), then this exception is thrown.

    • inWorldBoundsOnSphere

      public boolean inWorldBoundsOnSphere(ILcdPoint aXYPoint, double aRadius)
      Description copied from interface: ILcdProjection
      Checks if a ILcdPoint is inside the valid cartesian area of the projection. The valid cartesian area is determined naturally by the projection bounds or by an artificial introduced boundary limit because some cartesian points are at infinity. The shape of the valid cartesian area is in many cases rectangular or circular although it might be more complex.
      Specified by:
      inWorldBoundsOnSphere in interface ILcdProjection
      Parameters:
      aXYPoint - point to be checked upon.
      aRadius - radius of the sphere.
      Returns:
      true if valid, false if invalid.

    • world2DEditableBoundsOnSphereSFCT

      public void world2DEditableBoundsOnSphereSFCT(double aRadius, ILcd2DEditableBounds aWorldBoundsSFCT)
      Description copied from interface: ILcdProjection
      Sets the ILcd2DEditableBounds object to the bounds of the projection in world coordinates.
      Specified by:
      world2DEditableBoundsOnSphereSFCT in interface ILcdProjection
      Parameters:
      aRadius - radius of the sphere.
      aWorldBoundsSFCT - the bounds of the projection in world coordinates as side effect.

    • toString

      public String toString()
      Description copied from interface: ILcdProjection
      String representation of this ILcdProjection.
      Specified by:
      toString in interface ILcdProjection
      Overrides:
      toString in class Object
      Returns:
      String representation of this ILcdProjection.

    • equals

      public boolean equals(Object aO)
      Description copied from interface: ILcdProjection
      Checks if this ILcdProjection equals some other Object.
      Specified by:
      equals in interface ILcdProjection
      Overrides:
      equals in class Object
      Parameters:
      aO - Object to compare with.
      Returns:
      true if the Object is an instance of the same ILcdProjection class and having the same projection properties, false otherwise.

    • hashCode

      public int hashCode()
      Overrides:
      hashCode in class Object

    • clone

      public Object clone()
      Description copied from interface: ILcdProjection
      Makes a deep clone of this ILcdProjection.
      Specified by:
      clone in interface ILcdProjection
      Overrides:
      clone in class ALcdProjection
      Returns:
      deep clone of this ILcdProjection.

    • loadProperties

      public void loadProperties(String aPrefix, Properties aProperty) throws IllegalArgumentException
      Description copied from interface: ILcdProjection
      The properties of an ILcdProjection determine the projection parameters that determine the plane, cylinder or cone on which the projection is done. The properties of an ILcdProjection are of course dependent on the projection. A common property for all ILcdprojection objects is the origin of the projection. Other, more specific, properties are standard parallels, azimuthal direction, perspective distance, ... .
      Specified by:
      loadProperties in interface ILcdProjection
      Parameters:
      aPrefix - prefix for property names.
      aProperty - Properties object containing the serialized projection.
      Throws:
      IllegalArgumentException

    • writePropertiesSFCT

      public void writePropertiesSFCT(String aPrefix, Properties aPropertySFCT)
      Description copied from interface: ILcdProjection
      The properties of an ILcdProjection determine the projection parameters that determine the plane, cylinder or cone on which the projection is done. The properties of an ILcdProjection are of course dependent on the projection. A common property for all ILcdprojection objects is the origin of the projection. Other, more specific, properties are standard parallels, azimuthal direction, perspective distance, ... .
      Specified by:
      writePropertiesSFCT in interface ILcdProjection
      Parameters:
      aPrefix - prefix for property names.
      aPropertySFCT - Properties object in which to store the serialized projection properties as side effect.