| org.geotools.referencing.operation.projection.MapProjection
 org.geotools.referencing.operation.projection.AlbersEqualArea
| AlbersEqualArea | | public class AlbersEqualArea extends MapProjection (Code) | | Albers Equal Area Projection (EPSG code 9822). This is a conic projection
with parallels being unequally spaced arcs of concentric circles, more
closely spaced at north and south edges of the map. Merideans
are equally spaced radii of the same circles and intersect parallels at right
angles. As the name implies, this projection minimizes distortion in areas.
The "standard_parallel_2" parameter is optional and will be given the
same value as "standard_parallel_1" if not set (creating a 1 standard parallel
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 www.remotesensing.org/proj
Relevent files are: PJ_aea.c, pj_fwd.c and pj_inv.c
- John P. Snyder (Map Projections - A Working Manual,
U.S. Geological Survey Professional Paper 1395, 1987)
- "Coordinate Conversions and Transformations including Formulas",
EPSG Guidence Note Number 7, Version 19.
See Also: Albers Equal-Area Conic Projection on MathWorld
See Also: "Albers_Conic_Equal_Area" on RemoteSensing.org
See Also: British Columbia Albers Standard Projection
since:
2.1
version:
$Id: AlbersEqualArea.java 24384 2007-02-14 00:23:05Z desruisseaux $
author:
Rueben Schulz |
| Inner Class :public static class Provider extends AbstractProvider | |
| Constructor Summary | |
| protected | AlbersEqualArea(ParameterValueGroup parameters)
Constructs a new map projection from the supplied parameters. |
| AlbersEqualArea | | protected AlbersEqualArea(ParameterValueGroup parameters) throws ParameterNotFoundException(Code) | | Constructs a new map projection from the supplied parameters.
Parameters:
parameters - The parameter values in standard units.
throws:
ParameterNotFoundException - if a mandatory parameter is missing. |
| equals | | public boolean equals(Object object)(Code) | | Compares the specified object with this map projection for equality.
|
| getParameterDescriptors | | public ParameterDescriptorGroup getParameterDescriptors()(Code) | | |
| getParameterValues | | public ParameterValueGroup getParameterValues()(Code) | | |
| hashCode | | public int hashCode()(Code) | | Returns a hash value for this projection.
|
| inverseTransformNormalized | | protected Point2D inverseTransformNormalized(double x, double y, Point2D ptDst) throws ProjectionException(Code) | | Transforms the specified (x,y) coordinates
and stores the result in
ptDst .
|
| transformNormalized | | protected Point2D transformNormalized(double x, double y, Point2D ptDst) throws ProjectionException(Code) | | Transforms the specified (λ,φ) coordinates
(units in radians) and stores the result in
ptDst (linear distance
on a unit sphere).
|
| Methods inherited from org.geotools.referencing.operation.projection.MapProjection | static boolean checkInverseTransform(double longitude, double latitude, Point2D expected, double tolerance)(Code)(Java Doc)
static boolean checkInverseTransform(double longitude, double latitude, Point2D expected)(Code)(Java Doc)
static boolean checkTransform(double x, double y, Point2D expected, double tolerance)(Code)(Java Doc)
static boolean checkTransform(double x, double y, Point2D expected)(Code)(Java Doc)
final double cphi2(double ts) throws ProjectionException(Code)(Java Doc)
final double doubleValue(Collection expected, ParameterDescriptor param, ParameterValueGroup group) throws ParameterNotFoundException(Code)(Java Doc)
static void ensureLatitudeEquals(ParameterDescriptor name, double y, double expected) throws IllegalArgumentException(Code)(Java Doc)
static void ensureLatitudeInRange(ParameterDescriptor name, double y, boolean edge) throws IllegalArgumentException(Code)(Java Doc)
static void ensureLongitudeInRange(ParameterDescriptor name, double x, boolean edge) throws IllegalArgumentException(Code)(Java Doc)
final void ensureSpherical() throws IllegalArgumentException(Code)(Java Doc)
public boolean equals(Object object)(Code)(Java Doc)
static boolean equals(double value1, double value2)(Code)(Java Doc)
abstract public ParameterDescriptorGroup getParameterDescriptors()(Code)(Java Doc)
public ParameterValueGroup getParameterValues()(Code)(Java Doc)
final public int getSourceDimensions()(Code)(Java Doc)
final public int getTargetDimensions()(Code)(Java Doc)
protected double getToleranceForAssertions(double longitude, double latitude)(Code)(Java Doc)
public int hashCode()(Code)(Java Doc)
final public MathTransform inverse()(Code)(Java Doc)
abstract protected Point2D inverseTransformNormalized(double x, double y, Point2D ptDst) throws ProjectionException(Code)(Java Doc)
boolean isExpectedParameter(Collection expected, ParameterDescriptor param)(Code)(Java Doc)
final double msfn(double s, double c)(Code)(Java Doc)
final void set(Collection expected, ParameterDescriptor param, ParameterValueGroup group, double value)(Code)(Java Doc)
final public Point2D transform(Point2D ptSrc, Point2D ptDst) throws ProjectionException(Code)(Java Doc)
final public void transform(double[] src, int srcOffset, double[] dest, int dstOffset, int numPts) throws ProjectionException(Code)(Java Doc)
final public void transform(float[] src, int srcOffset, float[] dest, int dstOffset, int numPts) throws ProjectionException(Code)(Java Doc)
abstract protected Point2D transformNormalized(double x, double y, Point2D ptDst) throws ProjectionException(Code)(Java Doc)
final double tsfn(double phi, double sinphi)(Code)(Java Doc)
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