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java.lang.Objectorg.geotools.referencing.wkt.Formattable
org.geotools.referencing.operation.transform.AbstractMathTransform
org.geotools.referencing.operation.projection.MapProjection
org.geotools.referencing.operation.projection.Krovak
public class Krovak
Krovak Oblique Conformal Conic projection (EPSG code 9819). This projection is used in the Czech Republic and Slovakia under the name "Krovak" projection. The geographic coordinates on the ellipsoid are first reduced to conformal coordinates on the conformal (Gaussian) sphere. These spherical coordinates are then projected onto the oblique cone and converted to grid coordinates. The pseudo standard parallel is defined on the conformal sphere after its rotation, to obtain the oblique aspect of the projection. It is then the parallel on this sphere at which the map projection is true to scale; on the ellipsoid it maps as a complex curve.
The compulsory parameters are just the ellipsoid characteristics. All other parameters are optional and have defaults to match the common usage with Krovak projection.
In general the axis of Krovak projection are defined as westing and southing (not easting and northing) and they are also reverted, so if the value of projected coordinates should (and in y, x order in Krovak) be positive the 'Axis' parameter for projection should be defined explicitly like this (in wkt):
PROJCS["S-JTSK (Ferro) / Krovak", . . . PROJECTION["Krovak"] PARAMETER["semi_major", 6377397.155], PARAMETER["semi_minor", 6356078.963], UNIT["meter",1.0], AXIS["x", WEST], AXIS["y", SOUTH]]Axis in Krovak:
y<------------------+ | Czech. Rep. | | xBy default, the axis are 'easting, northing' so the values of projected coordinates are negative (and in y, x order in Krovak - it is cold Krovak GIS version).
References:
PJ_krovak.c
Nested Class Summary | |
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static class |
Krovak.Provider
The math transform provider for an Krovak projection (EPSG code 9819). |
Nested classes/interfaces inherited from class org.geotools.referencing.operation.projection.MapProjection |
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MapProjection.AbstractProvider |
Field Summary | |
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protected double |
azimuth
Azimuth of the centre line passing through the centre of the projection. |
protected double |
pseudoStandardParallel
Latitude of pseudo standard parallel. |
protected double |
x_scale
Parameter used by ESRI - scale for X Axis |
protected double |
xy_plane_rotation
Parameter used by ESRI - rotation |
protected double |
y_scale
Parameter used by ESRI - scale for Y Axis |
Fields inherited from class org.geotools.referencing.operation.projection.MapProjection |
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centralMeridian, en0, en1, en2, en3, en4, excentricity, excentricitySquared, falseEasting, falseNorthing, globalScale, isSpherical, latitudeOfOrigin, LOGGER, scaleFactor, semiMajor, semiMinor |
Fields inherited from class org.geotools.referencing.wkt.Formattable |
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SINGLE_LINE |
Constructor Summary | |
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protected |
Krovak(org.opengis.parameter.ParameterValueGroup parameters)
Constructs a new map projection from the supplied parameters. |
protected |
Krovak(org.opengis.parameter.ParameterValueGroup parameters,
boolean esriDefinition)
Constructs a new map projection from the supplied parameters. |
Method Summary | |
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boolean |
equals(java.lang.Object object)
Compares the specified object with this map projection for equality. |
org.opengis.parameter.ParameterDescriptorGroup |
getParameterDescriptors()
Returns the parameter descriptors for this map projection. |
org.opengis.parameter.ParameterValueGroup |
getParameterValues()
Returns the parameter values for this map projection. |
int |
hashCode()
Returns a hash value for this projection. |
protected java.awt.geom.Point2D |
inverseTransformNormalized(double x,
double y,
java.awt.geom.Point2D ptDst)
Transforms the specified (x,y) coordinate and stores the result in ptDst . |
protected java.awt.geom.Point2D |
transformNormalized(double lambda,
double phi,
java.awt.geom.Point2D ptDst)
Transforms the specified (λ,φ) coordinates (units in radians) and stores the result in ptDst (linear distance
on a unit sphere). |
Methods inherited from class org.geotools.referencing.operation.projection.MapProjection |
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getSourceDimensions, getTargetDimensions, getToleranceForAssertions, inv_mlfn, inverse, mlfn, resetWarnings, transform, transform, transform |
Methods inherited from class org.geotools.referencing.operation.transform.AbstractMathTransform |
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createTransformedShape, derivative, derivative, ensureNonNull, formatWKT, getName, isIdentity, needCopy, rollLongitude, transform, transform, transform |
Methods inherited from class org.geotools.referencing.wkt.Formattable |
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cleanupThreadLocals, toString, toWKT, toWKT, toWKT |
Methods inherited from class java.lang.Object |
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clone, finalize, getClass, notify, notifyAll, wait, wait, wait |
Methods inherited from interface org.opengis.referencing.operation.MathTransform2D |
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createTransformedShape, derivative |
Methods inherited from interface org.opengis.referencing.operation.MathTransform |
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derivative, isIdentity, toWKT, transform, transform, transform |
Field Detail |
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protected final double azimuth
protected double x_scale
protected double y_scale
protected double xy_plane_rotation
protected final double pseudoStandardParallel
Constructor Detail |
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protected Krovak(org.opengis.parameter.ParameterValueGroup parameters) throws org.opengis.parameter.ParameterNotFoundException
parameters
- The parameter values in standard units.
org.opengis.parameter.ParameterNotFoundException
- if a mandatory parameter is missing.protected Krovak(org.opengis.parameter.ParameterValueGroup parameters, boolean esriDefinition) throws org.opengis.parameter.ParameterNotFoundException
parameters
- The parameter values in standard units.esriDefinition
- true if ESRI parameters are specified.
org.opengis.parameter.ParameterNotFoundException
- if a mandatory parameter is missing.Method Detail |
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public org.opengis.parameter.ParameterDescriptorGroup getParameterDescriptors()
MapProjection.getParameterValues()
, as well as arguments checking.
getParameterDescriptors
in class MapProjection
null
.OperationMethod.getParameters()
public org.opengis.parameter.ParameterValueGroup getParameterValues()
getParameterValues
in class MapProjection
Operation.getParameterValues()
protected java.awt.geom.Point2D transformNormalized(double lambda, double phi, java.awt.geom.Point2D ptDst) throws ProjectionException
ptDst
(linear distance
on a unit sphere).
transformNormalized
in class MapProjection
lambda
- The longitude of the coordinate, in radians.phi
- 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.
lambda
, phi
)
and storing the result in ptDst
.
ProjectionException
- if the point can't be transformed.protected java.awt.geom.Point2D inverseTransformNormalized(double x, double y, java.awt.geom.Point2D ptDst) throws ProjectionException
ptDst
.
inverseTransformNormalized
in class MapProjection
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.
x
, y
and storing the result in ptDst
.
ProjectionException
- if the point can't be transformed.public int hashCode()
hashCode
in class MapProjection
public boolean equals(java.lang.Object object)
equals
in class MapProjection
object
- The object to compare with this transform.
true
if the given object is a transform of the same class
and if, given identical source position, the
transformed
position would be the equals.
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