How to orthorectify an image (ArcObjects .NET 10.6 SDK)
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How to orthorectify an image


Orthorectifying an image

The following code example reads a rational polynomial coefficient (RPC) image and performs orthorectification using a digital elevation model (DEM):
[C#]
public static void OrthorectifyImage(IRasterDataset2 rpcDataset, IRasterDataset
    demDataset)
{
    //rpcDataset—Represents a raster dataset that has RPC information.
    //demDataset—Represents a raster dataset opened from a DEM of the same area.

    //Get the RPCXform from the raster dataset.
    IRaster2 raster=(IRaster2)rpcDataset.CreateFullRaster();
    IGeodataXform rpcXform=raster.GeodataXform;

    //Set the DEM, and so on.
    ISensorXform sensor=(ISensorXform)rpcXform;
    sensor.DEM=demDataset.CreateDefaultRaster();
    sensor.CorrectGeoid=true;

    //Save the result.
    ISaveAs saveas=(ISaveAs)raster;
    saveas.SaveAs(@"c:\temp\orthorectify_output.img", null, "IMAGINE Image");
}
[VB.NET]
Public Shared Sub OrthorectifyImage(ByVal rpcDataset As IRasterDataset2, ByVal demDataset As IRasterDataset)

'rpcDataset—Represents a raster dataset that has RPC information.
'demDataset—Represents a raster dataset opened from a DEM of the same area.

'Get the RPCXform from the raster dataset.
Dim raster As IRaster2=CType(rpcDataset.CreateFullRaster(), IRaster2)
Dim rpcXform As IGeodataXform=raster.GeodataXform

'Set the DEM, and so on.
Dim sensor As ISensorXform=CType(rpcXform, ISensorXform)
sensor.DEM=demDataset.CreateDefaultRaster()
sensor.CorrectGeoid=True

'Save the result.
Dim saveas As ISaveAs=CType(raster, ISaveAs)
saveas.SaveAs("c:\temp\orthorectify_output.img", Nothing, "IMAGINE Image")

End Sub






To use the code in this topic, reference the following assemblies in your Visual Studio project. In the code files, you will need using (C#) or Imports (VB .NET) directives for the corresponding namespaces (given in parenthesis below if different from the assembly name):
Development licensing Deployment licensing
ArcGIS Desktop Advanced ArcGIS Desktop Advanced
ArcGIS Desktop Standard ArcGIS Desktop Standard
ArcGIS Desktop Basic ArcGIS Desktop Basic
Engine Developer Kit Engine