IPolynomialXform Interface

Provides access to members that control a polynomial transform.

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Members

	All Properties Methods Inherited Non-inherited	Description
	ApplyRotation	Applies a rotation to the polynomial.
	ApplyScale	Applies a scale to the polynomial.
	ApplyShift	Applies a shift to the polynomial.
	CheckResidualRMS	Gets the residuals and RMS using checking points.
	DefineFromCoefficients	Defines a polynomial XForm from polynomial (order: 1-3) coefficients .
	DefineFromControlPoints	Defines a polynomial (order: 1-3) XForm from control points.
	Domains	The domains in output space.
	GetCoefficients	Gets the coefficients of the polynomial.
	GetControlPoints	Gets control points used in defining the polynomial.
	GetSystemResidual	Gets the system residuals.
	GetSystemRMS	Gets the system RMS.
	IsIdentity	Indicates if this geodata transform is an identity transform.
	Order	The polynomial order (1-3).
	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

Inherited Interfaces

CoClasses that implement IPolynomialXform

Remarks

The IPolynomialXform interface provides methods and properties used to create the PolynomialXform object and perform error analysis of the polynomial transformation.

You can create a PolynomialXform in two ways: One is to use DefineFromControlPoints with two sets of control points, one being source and one being target, to construct a polynomial. The other way is to set the polynomial coefficients directly using DefineFromCoefficients if the polynomial coefficients are known.

A polynomial transformation is an approximate transformation and the IPolynomialXform interface provides two ways to calculate the system residuals and RMS. One is based on the control points using GetSystemResidual and GetSystemRMS methods; and the other is based on a set of check points using CheckResidualRMS method.