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关于IDW空间插值
空间插值一般都会用到IInterPolationOP接口等
首先是通过图层的名称获取图层的方法:
private ILayer GetLayerByName(string name)
{
ILayer layer = null;
for (int i = 0; i < axmapcontrol.Map.LayerCount; i++)
{
if (name == axmapcontrol.Map.Layer[i].Name)
{
layer = axmapcontrol.Map.get_Layer(i);
break;
}
}
return layer;
}
进行插值:
string layerName = comboBox1.SelectedItem.ToString();
string fieldName = comboBox2.SelectedItem.ToString();
object CellSize = textBox1.Text;
IFeatureLayer layer = GetLayerByName(layerName) as IFeatureLayer;
IGeoDataset geoLayer=GetLayerByName(layerName) as IGeoDataset;
object Env= geoLayer.Extent;
IFeatureClassDescriptor descriptor = new FeatureClassDescriptorClass();
descriptor.Create(layer.FeatureClass, null, fieldName); //处理转换的字段
object ob = null;
IRasterRadius radius = new RasterRadiusClass();//设置半径
object maxDistance = null;
radius.SetVariable(12, ref maxDistance);
IInterpolationOp interpolation = new RasterInterpolationOpClass();
IRasterAnalysisEnvironment environment = interpolation as IRasterAnalysisEnvironment;
environment.SetCellSize(esriRasterEnvSettingEnum.esriRasterEnvValue, ref CellSize);//设置像元大小
environment.SetExtent(esriRasterEnvSettingEnum.esriRasterEnvValue, ref Env, ref ob);//设置插值的范围
IGeoDataset dataset1= interpolation.IDW((IGeoDataset)descriptor, 2, radius, ref maxDistance);//执行插值
IRaster raster = new ESRI.ArcGIS.DataSourcesRaster.Raster();//添加到图层
raster = dataset1 as IRaster;
IRasterLayer rasterLayer = new RasterLayerClass();
rasterLayer.CreateFromRaster(raster);
rasterLayer.Name = "IDWraster";
axmapcontrol.AddLayer(rasterLayer);
MessageBox.Show("插值成功");
关于IDW空间插值