ArcGISEngine实现栅格数据裁剪
上一篇 / 下一篇 2012-12-27 00:09:47 / 个人分类：ArcGISEngine开发
ArcGIS空间分析扩展模块提供了对栅格数据进行裁剪抽取操作的功能，在ArcGISEngine中可以调用相关的GP工具来对栅格数据操作。
- 调用空间分析ArcToolbox中Extract By Polygon工具
private void ExtractByPolygon()
{
IVariantArray parameters = new VarArrayClass();
string sDocPath = @"C:\filerastergdb.gdb\raster"; //地图文档路径
string sDocPath1 = @"C:\filerasteroutput.gdb\outraster";
parameters.Add(sDocPath);
string ss1 = "'545160.944 4639276.889';'545216.242 4639266.57';'545227.355 4639308.375'";;
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);
}
}
- 调用IExtractionOp接口对栅格数据裁剪
public void ExtractionRasterData(IGeoDataset pGeoDataset, ESRI.ArcGIS.Geometry.IPolygon pPolygone, bool binside)
{
ESRI.ArcGIS.SpatialAnalyst.IExtractionOp pExtractionOp = new ESRI.ArcGIS.SpatialAnalyst.RasterExtractionOpClass();
ESRI.ArcGIS.Geodatabase.IGeoDataset pGeoOutput = pExtractionOp.Polygon(pGeoDataset, pPolygone, binside);
}