【ArcObjects .NET】空间参考

缺乏、安全感 2022-10-18 01:56 289阅读 0赞

创建一个投影坐标系为【`CGCS2000_3_Degree_GK_Zone_38`】，高程坐标系为【`Yellow_Sea_1985`】的要素数据集：

注意：`ArcObjects`投影坐标系枚举类【`esriSRProjCSType`/`esriSRProjCS2Type`/`esriSRProjCS3Type`/`esriSRProjCS4Type`】中不存在`CGCS2000`的投影坐标，可以到`ArcGIS`中查看`CGCS2000`坐标系的`WKID`输入。

public void CreateDataset(IWorkspace tWorkspace, string datasetName)
     { 
    	IWorkspace2 tWorkspace2 = tWorkspace as IWorkspace2;
    	IFeatureWorkspace fcWorkspace = tWorkspace as IFeatureWorkspace;
    			
    	// 若工作空间不存在数据集时，创建之
        if (!tWorkspace2.get_NameExists(esriDatasetType.esriDTFeatureDataset, datasetName))
        { 
    		// 创建投影坐标系CGCS2000_3_Degree_GK_Zone_38
    		//IGeographicCoordinateSystem geographicCoordinateSystem = spatialReferenceFactory.CreateGeographicCoordinateSystem((int)esriSRGeoCSType.esriSRGeoCS_Airy1830);
    		//IProjectedCoordinateSystem geographicCoordinateSystem = spatialReferenceFactory.CreateProjectedCoordinateSystem((int)esriSRProjCS4Type.esriSRProjCS_Beijing1954_3_Degree_GK_CM_117E);
    		ISpatialReferenceFactory3 spatialReferenceFactory = new SpatialReferenceEnvironmentClass();
    		IProjectedCoordinateSystem geographicCoordinateSystem = spatialReferenceFactory.CreateProjectedCoordinateSystem(4526);
    
    	     // 创建高程坐标系Yellow_Sea_1985
    		ISpatialReference3 spatialReference = geographicCoordinateSystem as ISpatialReference3;
    		IVerticalCoordinateSystem verticalCoordinateSystem = spatialReferenceFactory.CreateVerticalCoordinateSystem((int)esriSRVerticalCSType.esriSRVertCS_YellowSea1985);
    	     spatialReference.VerticalCoordinateSystem = verticalCoordinateSystem;
    	     
    		// 创建要素数据集
    		fcWorkspace.CreateFeatureDataset(datasetName, spatialReference); 
    	}
    }