AlbersEqualAreaEllipse (All javadoc for netcdf-java version 4.6.22-SNAPSHOT)

java.lang.Object
- ucar.unidata.geoloc.ProjectionImpl
- - ucar.unidata.geoloc.projection.proj4.AlbersEqualAreaEllipse

All Implemented Interfaces:

java.io.Serializable, Projection
```
public class AlbersEqualAreaEllipse
extends ProjectionImpl
```
Adapted from com.jhlabs.map.proj.AlbersProjection

Since:

Oct 8, 2009

See Also:

"http://www.jhlabs.com/java/maps/proj/index.html", "http://trac.osgeo.org/proj/", Serialized Form

Field Summary
- Fields inherited from class ucar.unidata.geoloc.ProjectionImpl
  atts, defaultMapArea, EARTH_RADIUS, INDEX_LAT, INDEX_LON, INDEX_X, INDEX_Y, isLatLon, name, PI, PI_OVER_2, PI_OVER_4, TOLERANCE

Constructor Summary

Constructors
Constructor and Description
`AlbersEqualAreaEllipse()` Constructor with default parameters
`AlbersEqualAreaEllipse(double lat0, double lon0, double par1, double par2, double falseEasting, double falseNorthing, Earth earth)` Construct a AlbersEqualAreaEllipse Projection, two standard parellels.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`ProjectionImpl`	`constructCopy()` copy constructor - avoid clone !!
`boolean`	`crossSeam(ProjectionPoint pt1, ProjectionPoint pt2)` This returns true when the line between pt1 and pt2 crosses the seam.
`boolean`	`equals(java.lang.Object o)` Returns true if this represents the same Projection as proj.
`Earth`	`getEarth()`
`double`	`getFalseEasting()` Get the false easting, in km.
`double`	`getFalseNorthing()` Get the false northing, in km.
`double`	`getOriginLat()` Get the origin latitude.
`double`	`getOriginLon()` Get the origin longitude.
`double`	`getParallelOne()` Get the first standard parallel
`double`	`getParallelTwo()` Get the second standard parallel
`java.lang.String`	`getProjectionTypeLabel()` Get the label to be used in the gui for this type of projection
`int`	`hashCode()`
`ProjectionPoint`	`latLonToProj(LatLonPoint latLon, ProjectionPointImpl result)` Convert a LatLonPoint to projection coordinates
`static void`	`main(java.lang.String[] args)`
`java.lang.String`	`paramsToString()` Create a String of the parameters.
`LatLonPoint`	`projToLatLon(ProjectionPoint world, LatLonPointImpl result)` Convert projection coordinates to a LatLonPoint Note: a new object is not created on each call for the return value.

Methods inherited from class ucar.unidata.geoloc.ProjectionImpl
addParameter, addParameter, addParameter, findProjectionParameter, getClassName, getDefaultMapArea, getDefaultMapAreaLL, getHeader, getName, getProjectionParameters, isLatLon, latLonToProj, latLonToProj, latLonToProj, latLonToProj, latLonToProj, latLonToProj, latLonToProj, latLonToProj, latLonToProj, latLonToProj, latLonToProjBB, projToLatLon, projToLatLon, projToLatLon, projToLatLon, projToLatLon, projToLatLon, projToLatLonBB, projToLatLonBBold, setDefaultMapArea, setName, toString

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - AlbersEqualAreaEllipse
```
public AlbersEqualAreaEllipse()
```
    Constructor with default parameters
  - AlbersEqualAreaEllipse
```
public AlbersEqualAreaEllipse(double lat0,
                              double lon0,
                              double par1,
                              double par2,
                              double falseEasting,
                              double falseNorthing,
                              Earth earth)
```
    Construct a AlbersEqualAreaEllipse Projection, two standard parellels. For the one standard parellel case, set them both to the same value.
    
    Parameters:
    
    lat0 - lat origin of the coord. system on the projection plane
    
    lon0 - lon origin of the coord. system on the projection plane
    
    par1 - standard parallel 1
    
    par2 - standard parallel 2
    
    falseEasting - false easting in km
    
    falseNorthing - false easting in km
    
    earth - shape of the earth
    
    Throws:
    
    java.lang.IllegalArgumentException - if Math.abs(par1 + par2) < 1.e-10
- Method Detail
  - constructCopy
```
public ProjectionImpl constructCopy()
```
    Description copied from class: ProjectionImpl
    
    copy constructor - avoid clone !!
    
    Specified by:
    
    constructCopy in class ProjectionImpl
    
    Returns:
    
    a copy of this Projection
  - equals
```
public boolean equals(java.lang.Object o)
```
    Description copied from class: ProjectionImpl
    
    Returns true if this represents the same Projection as proj.
    
    Specified by:
    
    equals in interface Projection
    
    Specified by:
    
    equals in class ProjectionImpl
    
    Parameters:
    
    o - projection in question
    
    Returns:
    
    true if this represents the same Projection as proj.
  - hashCode
```
public int hashCode()
```
    Overrides:
    
    hashCode in class java.lang.Object
  - getEarth
```
public Earth getEarth()
```
  - getParallelTwo
```
public double getParallelTwo()
```
    Get the second standard parallel
    
    Returns:
    
    the second standard parallel in degrees
  - getParallelOne
```
public double getParallelOne()
```
    Get the first standard parallel
    
    Returns:
    
    the first standard parallel in degrees
  - getOriginLon
```
public double getOriginLon()
```
    Get the origin longitude.
    
    Returns:
    
    the origin longitude in degrees
  - getOriginLat
```
public double getOriginLat()
```
    Get the origin latitude.
    
    Returns:
    
    the origin latitude in degrees
  - getFalseEasting
```
public double getFalseEasting()
```
    Get the false easting, in km.
    
    Returns:
    
    the false easting in km
  - getFalseNorthing
```
public double getFalseNorthing()
```
    Get the false northing, in km.
    
    Returns:
    
    the false northing in km
  - getProjectionTypeLabel
```
public java.lang.String getProjectionTypeLabel()
```
    Get the label to be used in the gui for this type of projection
    
    Overrides:
    
    getProjectionTypeLabel in class ProjectionImpl
    
    Returns:
    
    Type label
  - paramsToString
```
public java.lang.String paramsToString()
```
    Create a String of the parameters.
    
    Specified by:
    
    paramsToString in interface Projection
    
    Specified by:
    
    paramsToString in class ProjectionImpl
    
    Returns:
    
    a String of the parameters
  - crossSeam
```
public boolean crossSeam(ProjectionPoint pt1,
                         ProjectionPoint pt2)
```
    This returns true when the line between pt1 and pt2 crosses the seam. When the cone is flattened, the "seam" is lon0 +- 180.
    
    Specified by:
    
    crossSeam in interface Projection
    
    Specified by:
    
    crossSeam in class ProjectionImpl
    
    Parameters:
    
    pt1 - point 1
    
    pt2 - point 2
    
    Returns:
    
    true when the line between pt1 and pt2 crosses the seam.
  - latLonToProj
```
public ProjectionPoint latLonToProj(LatLonPoint latLon,
                                    ProjectionPointImpl result)
```
    Description copied from class: ProjectionImpl
    
    Convert a LatLonPoint to projection coordinates
    
    Specified by:
    
    latLonToProj in interface Projection
    
    Specified by:
    
    latLonToProj in class ProjectionImpl
    
    Parameters:
    
    latLon - convert from these lat, lon coordinates
    
    result - the object to write to
    
    Returns:
    
    the given destPoint
  - projToLatLon
```
public LatLonPoint projToLatLon(ProjectionPoint world,
                                LatLonPointImpl result)
```
    Convert projection coordinates to a LatLonPoint Note: a new object is not created on each call for the return value.
    
    Specified by:
    
    projToLatLon in interface Projection
    
    Specified by:
    
    projToLatLon in class ProjectionImpl
    
    Parameters:
    
    world - convert from these projection coordinates
    
    result - the object to write to
    
    Returns:
    
    LatLonPoint convert to these lat/lon coordinates public LatLonPoint projToLatLon(ProjectionPoint world, LatLonPointImpl result) { double toLat, toLon; double fromX = world.getX() - falseEasting; double fromY = world.getY() - falseNorthing; double rrho0 = rho0; if (n < 0) { rrho0 *= -1.0; fromX *= -1.0; fromY *= -1.0; } double yd = rrho0 - fromY; double rho = Math.sqrt(fromX * fromX + yd * yd); double theta = Math.atan2(fromX, yd); if (n < 0) { rho *= -1.0; } toLat = Math.toDegrees(Math.asin((C - Math.pow((rho * n / EARTH_RADIUS), 2)) / (2 * n))); toLon = Math.toDegrees(theta / n + lon0); result.setLatitude(toLat); result.setLongitude(toLon); return result; } public Point2D.Double projectInverse(double xyx, double xyy, Point2D.Double out) { double rho; if ((rho = MapMath.distance(xyx, xyy = rho0 - xyy)) != 0) { double lpphi, lplam; if (n < 0.) { rho = -rho; xyx = -xyx; xyy = -xyy; } lpphi = rho / dd; if (!spherical) { lpphi = (c - lpphi * lpphi) / n; if (Math.abs(ec - Math.abs(lpphi)) > TOL7) { if ((lpphi = phi1_(lpphi, e, one_es)) == Double.MAX_VALUE) throw new ProjectionException("I"); } else lpphi = lpphi < 0. ? -MapMath.HALFPI : MapMath.HALFPI; } else if (Math.abs(out.y = (c - lpphi * lpphi) / n2) <= 1.) lpphi = Math.asin(lpphi); else lpphi = lpphi < 0. ? -MapMath.HALFPI : MapMath.HALFPI; lplam = Math.atan2(xyx, xyy) / n; out.x = lplam; out.y = lpphi; } else { out.x = 0.; out.y = n > 0. ? MapMath.HALFPI : - MapMath.HALFPI; } return out; }
  - main
```
public static void main(java.lang.String[] args)
```

Class AlbersEqualAreaEllipse

Field Summary

Fields inherited from class ucar.unidata.geoloc.ProjectionImpl

Constructor Summary

Method Summary

Methods inherited from class ucar.unidata.geoloc.ProjectionImpl

Methods inherited from class java.lang.Object

Constructor Detail

AlbersEqualAreaEllipse

AlbersEqualAreaEllipse

Method Detail

constructCopy

equals

hashCode

getEarth

getParallelTwo

getParallelOne

getOriginLon

getOriginLat

getFalseEasting

getFalseNorthing

getProjectionTypeLabel

paramsToString

crossSeam

latLonToProj

projToLatLon

main