org.opengis.coverage
Interface ValueCurve

All Superinterfaces:
ValueObject

@UML(identifier="CV_ValueCurve",
     specification=ISO_19123)
public interface ValueCurve
extends ValueObject

Basis for interpolating within a segmented curve coverage. A value curve is composed of a curve with additional information that supports the determination of feature attribute values at any position on that curve. Value curves depend upon the arc-length parameterization operations defined for Curve.


Method Summary
 Set<PointValuePair> getControlValues()
          Returns the set of point-value pairs that provide control values for the interpolation along the value curve.
 DomainObject getGeometry()
          Returns the cruve that is the basis of this value curve.
 Set<ValueSegment> segment(DirectPosition p, Double tolerance)
          Returns the set of value segments nearest to the specified direct position.
 
Methods inherited from interface ValueObject
getInterpolationParameters, interpolate
 

Method Detail

getGeometry

@UML(identifier="geometry",
     obligation=MANDATORY,
     specification=ISO_19123)
DomainObject getGeometry()
Returns the cruve that is the basis of this value curve.

Specified by:
getGeometry in interface ValueObject
TODO:
According ISO 19123, the return value should be Curve.

getControlValues

@UML(identifier="controlValue",
     obligation=MANDATORY,
     specification=ISO_19123)
Set<PointValuePair> getControlValues()
Returns the set of point-value pairs that provide control values for the interpolation along the value curve.

Specified by:
getControlValues in interface ValueObject

segment

@UML(identifier="segment",
     obligation=MANDATORY,
     specification=ISO_19123)
Set<ValueSegment> segment(DirectPosition p,
                                                                                 Double tolerance)
Returns the set of value segments nearest to the specified direct position. This method shall invoke the GenericCurve.getParamForPoint(org.opengis.geometry.DirectPosition) method to obtain the distance parameter corresponding to the input direct position. The method getParamForPoint returns the parameter value for the position on the curve closest to the input direct position.

This method will normally return a single value segment. There are three cases for which it could return multiple value segments:

TODO:
I'm not sure to understand how the exception clause is related to the first sentence in the two first points?


Copyright © 1994-2008 Open Geospatial Consortium. All Rights Reserved.