ArcObjects Library Reference (Geometry)

CoordinateFrameTransformation CoClass

Creates a Coordinate Frame transformation.

Product Availability

Available with ArcGIS Engine, ArcGIS Desktop, and ArcGIS Server.

Description

A CoordinateFrameTransformation is a seven parameter geographic (datum) transformation. The seven parameters are three translations in meters, three rotations in arc seconds, and a scale factor in parts per million. The parameters refer to XYZ space. The conversion of features to and from XYZ space is done automatically as part as the method. If the input and output spheroids (ellipsoids) are different, that is also handled automatically. The PositionVectorTransformation is similar but uses a different convention when handling the rotation values. To convert between a coordinate frame and position vector methods, change the signs of the rotation values.

Supported Platforms

Windows, Solaris, Linux

Extended Error Information

Use the ISupportErrorInfo method InterfaceSupportsErrorInfo to determine if the object supports extended error information. If the object supports extended error info, VC++ developers should use the OLE/COM IErrorInfo interface to access the ErrorInfo object. Visual Basic developers should use the global error object Err to retrieve this extended error information.

Interfaces

Interfaces	Description
IClone (esriSystem)	Provides access to members that control cloning of objects.
ICoordinateFrameTransformation	Provides access to members that control the 3D frame transformation with rotation, translation and scaling.
IGeoTransformation	Provides access to members that define a geographic (datum) transformation.
IPersist	Defines the single method GetClassID, which is designed to supply the CLSID of an object that can be stored persistently in the system. IPersist is the base interface for three other interfaces: IPersistStorage, IPersistStream, and IPersistFile.
IPersistStream (esriSystem)
ISpatialReferenceAuthority	Provides access to the authority-related metadata for a spatial reference object.
ISupportErrorInfo	Indicates whether a specific interface can return Automation error objects.
ITransformation	Provides access to members that apply a function (or its inverse) to a set of points or measures. The suffix of each method indicates the type of parameters operated on.
ITransformationGEN	Provides access to members that apply a function (or its inverse) to a set of points or measures. The suffix of each method indicates the type of parameters operated on. ITransformationGEN is generic version of ITransformation.
IXMLSerialize (esriSystem)	Provides access to members that XML serialize and deserialize an object to/from XML.
IXMLVersionSupport (esriSystem)	Provides access to members that help in serializing an object to different namespaces (versions).

Remarks

The position vector transformation is the same method but with rotations defined in the opposite direction. Make sure you know which method to use. If you change the signs of the rotation values, you can use the other method and get the same results.