Provides access to members that control geodata transformation.
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
| Name | Description | |
|---|---|---|
 | Domains | The domains in output space. |
| 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 |
IGeodataXform.Domains Property
The domains in output space.
Public ReadOnly Property Domains As IGeometryCollection public IGeometryCollection Domains {get;} Description
The returned domains should a single polygon geometry or a collection of polygons.
IGeodataXform.IsIdentity Property
Indicates if this geodata transform is an identity transform.
Public ReadOnly Property IsIdentity As Boolean public bool IsIdentity {get;} IGeodataXform.SpatialReference Property
The output spatial reference after applying this transform.
Public Property SpatialReference As ISpatialReference public ISpatialReference SpatialReference {get; set;} IGeodataXform.Transform Method
Transforms a set of points in a given direction.
Public Sub Transform ( _ ByVal Direction As esriTransformDirection, _ ByVal npoints As Integer, _ ByRef points As WKSPoint _ ) public void Transform ( esriTransformDirection Direction, int npoints, ref WKSPoint points ); IGeodataXform.TransformCellsize Method
Transforms a cellsize in a given direction.
Public Sub TransformCellsize ( _ ByVal Direction As esriTransformDirection, _ ByRef dx As Double, _ ByRef dy As Double, _ ByVal AreaOfInterest As IEnvelope _ ) public void TransformCellsize ( esriTransformDirection Direction, ref double dx, ref double dy, ref IEnvelope AreaOfInterest ); IGeodataXform.TransformExtent Method
Transforms an extent in a given direction.
Public Sub TransformExtent ( _ ByVal Direction As esriTransformDirection, _ ByVal Extent As IEnvelope _ ) public void TransformExtent ( esriTransformDirection Direction, IEnvelope Extent ); IGeodataXform.TransformPoints Method
Transforms a point collection in a given direction
Public Sub TransformPoints ( _ ByVal Direction As esriTransformDirection, _ ByVal points As IPointCollection _ ) public void TransformPoints ( esriTransformDirection Direction, IPointCollection points ); Classes that implement IGeodataXform
| Classes | Description |
|---|---|
| ApproximationXform (esriDataSourcesRaster) | A transformation that approximates other transformations. |
| CompositeXform (esriDataSourcesRaster) | A composite geodata transform collection class. |
| EpipolarXform (esriDataSourcesRaster) | A transformation that map native image to epipolar image. |
| Formosat2Xform (esriDataSourcesRaster) | A Formosat2 transform class. |
| FrameXform (esriDataSourcesRaster) | A standard frame camera model transformation class. |
| PushbroomXform (esriDataSourcesRaster) | A Pushbroom sensor model class. |
| RPCXform (esriDataSourcesRaster) | A Rational Polynomial Coefficient (RPC) transform class. |
| SICDXform (esriDataSourcesRaster) | Sensor Independent Complex Data (SICD) Xform. |
| SPOT5Xform (esriDataSourcesRaster) | A SPOT5 1A transform class. |