转自原文 ArcGIS Engine中空间参照(地理坐标)相关方法总结

1.创建空间参考

/// <summary>  /// 根据prj文件创建空间参考  /// </summary>  /// <param name="strProFile">空间参照文件</param>  /// <returns></returns>  public static ISpatialReference CreateSpatialReference(string strProFile)  {      ISpatialReferenceFactory pSpatialReferenceFactory = new SpatialReferenceEnvironmentClass();      ISpatialReference pSpatialReference = pSpatialReferenceFactory.CreateESRISpatialReferenceFromPRJFile(strProFile);      return pSpatialReference;             }  /// <summary>  /// 创建地理坐标系  /// </summary>  /// <param name="gcType">esriSRProjCS4Type</param>  /// <returns></returns>  public static ISpatialReference CreateGeographicCoordinate(esriSRProjCS4Type gcsType)  {      ISpatialReferenceFactory pSpatialReferenceFactory = new SpatialReferenceEnvironmentClass();      ISpatialReference pSpatialReference = pSpatialReferenceFactory.CreateGeographicCoordinateSystem((int)gcsType);      return pSpatialReference;  }  /// <summary>  /// 创建投影坐标系  /// </summary>  /// <param name="pcType">esriSRProjCS4Type</param>  /// <returns></returns>  public static ISpatialReference CreateProjectedCoordinate(esriSRProjCS4Type pcsType)  {      ISpatialReferenceFactory2 pSpatialReferenceFactory = new SpatialReferenceEnvironmentClass();      ISpatialReference pSpatialReference = pSpatialReferenceFactory.CreateProjectedCoordinateSystem((int)pcsType);      return pSpatialReference;  }  /// <summary>  /// 获取空投影  /// </summary>  /// <returns></returns>  public static ISpatialReference CreateUnKnownSpatialReference()  {      ISpatialReference pSpatialReference = new UnknownCoordinateSystemClass();      pSpatialReference.SetDomain(0, 99999999, 0, 99999999);//设置空间范围      return pSpatialReference;  }  2.获取空间参考/// <summary>  /// 获取要素集空间参考  /// </summary>  /// <param name="pFeatureDataset">要素集</param>  /// <returns></returns>  public static ISpatialReference GetSpatialReference(IFeatureDataset pFeatureDataset)  {      IGeoDataset pGeoDataset = pFeatureDataset as IGeoDataset;      ISpatialReference pSpatialReference = pGeoDataset.SpatialReference;      return pSpatialReference;             }  /// <summary>  /// 获取要素层空间参考  /// </summary>  /// <param name="pFeatureLayer">要素层</param>  /// <returns></returns>  public static ISpatialReference GetSpatialReferenc(IFeatureLayer pFeatureLayer)  {IFeatureClass pFeatureClass = pFeatureLayer.FeatureClass;      IGeoDataset pGeoDataset = pFeatureClass as IGeoDataset;      ISpatialReference pSpatialReference = pGeoDataset.SpatialReference;      return pSpatialReference;             }  /// <summary>  /// 获取要素类空间参考  /// </summary>  /// <param name="pFeatureClass">要素类</param>  /// <returns></returns>  public static ISpatialReference GetSpatialReference(IFeatureClass pFeatureClass)  {      IGeoDataset pGeoDataset = pFeatureClass as IGeoDataset;      ISpatialReference pSpatialReference = pGeoDataset.SpatialReference;      return pSpatialReference;             }  3.修改空间参考/// <summary>  /// 修改要素集空间参考  /// </summary>  /// <param name="pFeatureDataset">要素集</param>  /// <param name="pSpatialReference">新空间参考</param>  public static void AlterSpatialReference(IFeatureDataset pFeatureDataset, ISpatialReference pSpatialReference)  {      IGeoDataset pGeoDataset = pFeatureDataset as IGeoDataset;      IGeoDatasetSchemaEdit pGeoDatasetSchemaEdit = pGeoDataset as IGeoDatasetSchemaEdit;      if (pGeoDatasetSchemaEdit.CanAlterSpatialReference == true)          pGeoDatasetSchemaEdit.AlterSpatialReference(pSpatialReference);  }  /// <summary>  /// 修改要素类空间参考  /// </summary>  /// <param name="pFeatureClass">要素类</param>  /// <param name="pSpatialReference">新空间参考</param>  public static void AlterSpatialReference(IFeatureClass pFeatureClass, ISpatialReference pSpatialReference)  {      IGeoDataset pGeoDataset = pFeatureClass as IGeoDataset;      IGeoDatasetSchemaEdit pGeoDatasetSchemaEdit = pGeoDataset as IGeoDatasetSchemaEdit;      if (pGeoDatasetSchemaEdit.CanAlterSpatialReference == true)          pGeoDatasetSchemaEdit.AlterSpatialReference(pSpatialReference);  }  

ArcGIS Engine中空间参照(地理坐标)相关方法总结