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| ArcObjects Help for .NET developers > ArcObjects namespaces > GeoAnalyst > ESRI.ArcGIS.GeoAnalyst > Interfaces > IT > ITransformationOp Interface > ITransformationOp.ProjectFast Method (ArcObjects .NET 10.5 SDK) | 
Converts a raster between two coordinate systems on region bases.
[Visual Basic .NET] Public Function ProjectFast ( _ ByVal GeoDataset As IGeoDataset, _ ByVal newSpatialReference As ISpatialReference, _ ByVal resampleType As esriGeoAnalysisResampleEnum, _ [ByRef CellSize As Object] _ ) As IGeoDataset
[C#] public IGeoDataset ProjectFast ( IGeoDataset GeoDataset, ISpatialReference newSpatialReference, esriGeoAnalysisResampleEnum resampleType, ref object CellSize );
Optional Values
[C++]
HRESULT ProjectFast(
  IGeoDataset* GeoDataset,
  ISpatialReference* newSpatialReference,
  esriGeoAnalysisResampleEnum resampleType,
  VARIANT* CellSize,
  IGeoDataset** outGeoDataset
);
[C++]
Parameters GeoDataset [in]
GeoDataset is a parameter of type IGeoDataset newSpatialReference [in]
newSpatialReference is a parameter of type ISpatialReference resampleType [in]
resampleType is a parameter of type esriGeoAnalysisResampleEnum CellSize [optional] CellSize is a parameter of type VARIANT
To indicate this parameter is undefined pass a reference to a VARIANT with type VT_ERROR and scode value of DISP_E_PARAMNOTFOUND. outGeoDataset [out, retval]
outGeoDataset is a parameter of type IGeoDataset
| GeoDataset | an input Raster, RasterDataset, RasterBand, or RasterDescriptor | 
| newSpatialReference | references an object supporting ISpatialReference interface that specifies the output spatial reference. | 
| resampleType | an esriGeoAnalysisResampleEnum specifing the resampling algorithm to be used when sampling a Raster can be of type: esriGeoAnalysisResampleBilinear - bilinear interpolation. This is Default. esriGeoAnalysisResampleCubic - cubic convolution. esriGeoAnalysisResampleNearest - nearest neighbor assignment. | 
| [cellSize] | ouput cellsize. The default is the current environment setting. |