Reprojection while loading Rasters

ChrisBarrington_Brown — Fri, 10 Sep 2010 13:16:41 GMT

I'm loading rasters into a file geodatabase in Engine code. Some of them need reprojecting so I'm trying the following code:

// I have an IRaster pointed to by pRaster and a required ISpatialReference pointed to by pSpatialRef

VARIANT vMissing;
vMissing.vt = VT_ERROR;
vMissing.scode = DISP_E_PARAMNOTFOUND;

// Create a RasterTransformionOp to do the re-projection
CComPtr<ITransformationOp> pTransform;
hr = pTransform.CoCreateInstance(CLSID_RasterTransformationOp);

// get the IGeoDataset of the original Raster
CComPtr<IGeoDataset> pInGeoDataset;
hr = pRaster.QueryInterface(&pInGeoDataset);

// Project it into the new Spatial Reference
CComPtr<IGeoDataset> pOutGeoDataset;
hr = pTransform->ProjectFast(pInGeoDataset, pSpatialRef, esriGeoAnalysisResampleCubic, &vMissing, &pOutGeoDataset);
       
// Get the resulting RasterDataset
CComPtr<IRasterDataset> pReprojRasterDataset;
hr = pOutGeoDataset.QueryInterface(&pReprojRasterDataset);

// Get the reprojected raster from the new dataset
CComPtr<IRaster> pReprojRaster;
hr = pReprojRasterDataset->CreateDefaultRaster(&pReprojRaster);

// Load it into the existing File Geodatabase
hr = pRasterLoader->Load(pRasterDataset, pReprojRaster);

However, the resultant raster isn't reprojected. Any clues as to what I am mis-understanding?

Chris

Re: Reprojection while loading Rasters

RobertBerger — Fri, 10 Sep 2010 14:26:48 GMT

Hi Chris,

Did you see the code snippet online: http://help.arcgis.com/en/sdk/10.0/arcobjects_net/conceptualhelp/index.html#/How_to_project_a_raster_with_a_datum_transformation/0001000003t8000000/
It talks about reprojecting a raster. The saveas call in the end just needs to go to your geodatabase rather than file system. I think that should do it.

Robert

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Reprojection while loading Rasters

Re: Reprojection while loading Rasters