Use ArcGISEngine to crop Raster Data

Use ArcGISEngine to crop Raster Data

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The ArcGIS Spatial Analysis extension module provides the ability to crop and extract raster data. In ArcGISEngine, you can call related GP tools to operate raster data.

• Call the Extract By Polygon tool in Space Analysis ArcToolbox

Private void ExtractByPolygon ()

{

IVariantArray parameters = new VarArrayClass ();

String sDocPath = @ "C: \ filerastergdb. gdb \ raster"; // map document path

String sDocPath1 = @ "C: \ filerasteroutput. gdb \ outraster ";

Parameters. Add (sDocPath );

String ss1 = "'2017. 545160 944 '; '2017. 4639276.889 545216'; '2017. 242 4639266.57 '";;

Parameters. Add (ss1 );

Parameters. Add (sDocPath1 );

Parameters. Add ("INSIDE ");

IGeoProcessor2 gp = new GeoProcessorClass ();

Gp. OverwriteOutput = true;

IGeoProcessorResult pResult = null;

Try

{

PResult = gp. Execute ("ExtractByPolygon", parameters, null );

IWorkspaceFactory pFWSF = new ESRI. ArcGIS. DataSourcesGDB. FileGDBWorkspaceFactoryClass ();

ESRI. ArcGIS. Geodatabase. IWorkspace pWS = pFWSF. OpenFromFile (@ "C: \ filerasteroutput. gdb", 0 );

ESRI. ArcGIS. Geodatabase. IRasterWorkspaceEx pRasterWs = pWS as ESRI. ArcGIS. Geodatabase. IRasterWorkspaceEx;

IRasterDataset pRasterDataset = pRasterWs. OpenRasterDataset ("outraster ");

IRasterLayer pRasterLayer = new RasterLayerClass ();

PRasterLayer. CreateFromDataset (pRasterDataset );

AxMapControl1.AddLayer (pRasterLayer );

String mess = null;

For (int k = 0; k <gp. MessageCount; k ++)

{

Mess + = gp. GetMessage (k) + "\ n ";

}

MessageBox. Show (mess );

}

Catch (Exception err)

{

String msg = err. Message;

String mess = null;

For (int k = 0; k <gp. MessageCount; k ++)

{

Mess + = gp. GetMessage (k) + "\ n ";

}

MessageBox. Show (mess );

}

}

 

• Call the IExtractionOp interface to crop raster data.

Public void ExtractionRasterData (IGeoDataset pGeoDataset, ESRI. ArcGIS. Geometry. ipolympus Gon pPolygone, bool binside)

{

ESRI. ArcGIS. SpatialAnalyst. IExtractionOp pExtractionOp = new ESRI. ArcGIS. SpatialAnalyst. RasterExtractionOpClass ();

ESRI. ArcGIS. Geodatabase. IGeoDataset pgooutput = pExtractionOp. Polygon (pGeoDataset, pPolygone, binside );

}