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ArcGIS Developer Help  (ESRI.ArcGIS.GeoAnalyst)

IInterpolationOp3 Interface

Provides access to additional members that control the Interpolating of a GeoDataset.

Product Availability

Available with ArcGIS Engine, ArcGIS Desktop, and ArcGIS Server.

Members

	AllPropertiesMethods	Description
	IDW	Interpolates using IDW.
	Krige	Interpolates using kriging.
	NaturalNeighbor	Interpolates using natual neighbor.
	Spline	Interpolates using splining.
	TopoToRasterByFile	Interpolates using AnuDem.
	Trend	Interpolates using trend surface.
	TrendWithRms	Interpolates using trend surface with optional rms file.
	Variogram	Interpolates using Variogram.

Classes that implement IInterpolationOp3

Classes	Description
RasterInterpolationOp	Raster interpolation operation class.

Remarks

• Read the Working with ArcGIS Spatial Analyst objects technical document for general information on implementing Spatial Analyst operations.

         private void CreateRasterFromPoints()
        {
            //1.将Shape文件读取成FeatureClass
            //2.根据FeatureClass生成IFeatureClassDescriptor 
            //3.创建IRasterRaduis 对象
            //设置Cell
            //4.插值并生成表面
            object obj = null;
            AccessFileData af = new AccessFileData(Application.StartupPath+@"\Business");
            IFeatureClass featureClass = af.GetFeatureClass("Rain_point");
            IGeoDataset geo = featureClass as IGeoDataset;
            object extend=geo.Extent;
            object o=null;
            IFeatureClassDescriptor feades = new FeatureClassDescriptorClass();
            feades.Create(featureClass, null, "QNData");
            IRasterRadius rasterrad=new RasterRadiusClass();
            rasterrad.SetVariable(12, ref obj);
            object dCell = 0.014800000;//可以根据不同的点图层进行设置
            IInterpolationOp interpla = new RasterInterpolationOpClass();
            IRasterAnalysisEnvironment rasanaenv = interpla as IRasterAnalysisEnvironment;
            rasanaenv.SetCellSize(esriRasterEnvSettingEnum.esriRasterEnvValue, ref dCell);
            rasanaenv.SetExtent(esriRasterEnvSettingEnum.esriRasterEnvValue, ref extend, ref o);
            g_GeoDS_Raster = interpla.IDW((IGeoDataset)feades, 2, rasterrad, ref obj);
        }