ISplineXform Interface

Provides access to members that control a Thin Plate Spline transform.

Members

	Name	Description
	DefineFromControlPoints	Defines a spline transform using control points.
	Domains	The domains in output space.
	GetControlPoints	Gets control points.
	IsIdentity	Indicates if this geodata transform is an identity transform.
	SpatialReference	The output spatial reference after applying this transform.
	Transform	Transforms a set of points in a given direction.
	TransformCellsize	Transforms a cellsize in a given direction.
	TransformExtent	Transforms an extent in a given direction.
	TransformPoints	Transforms a point collection in a given direction

ISplineXform.DefineFromControlPoints Method

Defines a spline transform using control points.

Public Sub DefineFromControlPoints ( _
    ByVal pSrcGCPs As IPointCollection, _
    ByVal pDstGCPs As IPointCollection _
)

public void DefineFromControlPoints (
    IPointCollection pSrcGCPs,
    IPointCollection pDstGCPs
);

ISplineXform.GetControlPoints Method

Gets control points.

Public Sub GetControlPoints ( _
    ByRef ppSrcGCPs As IPointCollection, _
    ByRef ppDstGCPs As IPointCollection _
)

public void GetControlPoints (
    ref IPointCollection ppSrcGCPs,
    ref IPointCollection ppDstGCPs
);

Inherited Interfaces

Interfaces	Description
IGeodataXform	Provides access to members that control geodata transformation.

Classes that implement ISplineXform

Classes	Description
SplineXform	A Thin Plate Spline transform class.

Remarks

The ISplineXform interface is used to create the SplineXform object from two sets of control points.

The SplineXform object performs a geodata transformation using a Spline function, a piecewise polynomial that maintains continuity and smoothness between adjacent polynomials. It transforms the source control points exactly to the target control points, while the points or pixels that are away from the control points are not always guaranteed to have higher accuracy. Spline transformation is useful when the control points are very important and required to be registered precisely. Adding more control points can increase an overall accuracy of the Spline transformation.