Provides access to members that control geodata transformation.
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Description
IGeodataXform is a generic interface that is supported by all geodata transformation objects. It is one of the interfaces that must be implemented when you create a custom geodata transformation object. The others are IPersistStream, for persisting a geodata transformation into its dataset, and IClone.
The IGeodataXform provides access to members that control geodata transformation properties, and perform the actual geodata transformation operation. A geodata transformation has an output spatial reference that describes the coordinates after transformation.
It can also use domains that specify a list of regions (polygons) within which the transformation is continuous. For examples, a World Cube projection has nine domains and within each domain, the projection transformation is continuous. The domains can be a single polygon geometry or a collection of polygons.
A geodata transformation can be an identity transformation which does not change the coordinates. Any geodata transformation can become an identity. ArcGIS provides a special geodata transformation, IdentityXform, which is used to model a spatial reference as identity geodata transformation.
The IGeodataXform has methods for transforming a set of 2D points, an extent, and a (raster) cellsize.
Members
| Description | ||
|---|---|---|
 |
Domains | The domains in output space. |
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IsIdentity | Indicates if this geodata transform is an identity transform. |
 |
SpatialReference | The output spatial reference after applying this transform. |
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Transform | Transforms a set of points in a given direction. |
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TransformCellsize | Transforms a cellsize in a given direction. |
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TransformExtent | Transforms an extent in a given direction. |
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TransformPoints | Transforms a point collection in a given direction |
CoClasses that implement IGeodataXform
| CoClasses and Classes | Description |
|---|---|
| AdjustXform (esriDataSourcesRaster) | An adjustment (rubber sheeting) transform class. |
| ApproximationXform (esriDataSourcesRaster) | A transformation that approximates other transformations. |
| CompositeXform (esriDataSourcesRaster) | A composite geodata transform collection class. |
| CoordinateXform (esriDataSourcesRaster) | A coordinate transform class. |
| CSMXform (esriDataSourcesRaster) | CSM transformation class. |
| Formosat2Xform (esriDataSourcesRaster) | A Formosat2 transform class. |
| FrameXform (esriDataSourcesRaster) | A standard frame camera model transformation class. |
| GCSShiftXform (esriDataSourcesRaster) | A GCS shift geodata transform class. |
| GeometricXform (esriDataSourcesRaster) | A geometric transform class. |
| IdentityXform (esriDataSourcesRaster) | An identity transform class. |
| LSRXform (esriDataSourcesRaster) | A Local Space Rectangular transform class. |
| PolynomialXform (esriDataSourcesRaster) | A polynomial transform class. |
| ProjectiveXform (esriDataSourcesRaster) | A projective transform class. |
| RPCXform (esriDataSourcesRaster) | A Rational Polynomial Coefficient (RPC) transform class. |
| SplineXform (esriDataSourcesRaster) | A Thin Plate Spline transform class. |
| SPOT5Xform (esriDataSourcesRaster) | A SPOT5 1A transform class. |