AE+c#要素类，地理坐标系和投影坐标系的设置

1.空坐标系

ISpatialReferenceFactory spatialReferenceFactory = new SpatialReferenceEnvironmentClass();

ISpatialReference spatialReference = new UnknownCoordinateSystemClass();

ISpatialReferenceResolution spatialReferenceResolution = (ISpatialReferenceResolution)spatialReference;

spatialReferenceResolution.ConstructFromHorizon();

ISpatialReferenceTolerance spatialReferenceTolerance = (ISpatialReferenceTolerance)spatialReference;

spatialReferenceTolerance.SetDefaultXYTolerance();

2.地理坐标系

ISpatialReferenceFactory spatialReferenceFactory = new SpatialReferenceEnvironmentClass();

esriSRGeoCS3Type geoSystem = esriSRGeoCS3Type.esriSRGeoCS_Xian1980;

ISpatialReferenceResolution spatialReferenceResolution = spatialReferenceFactory.CreateGeographicCoordinateSystem(Convert.ToInt32(geoSystem)) as ISpatialReferenceResolution;

spatialReferenceResolution.ConstructFromHorizon();

ISpatialReferenceTolerance spatialReferenceTolerance = spatialReferenceResolution as ISpatialReferenceTolerance;

spatialReferenceTolerance.SetDefaultXYTolerance();

ISpatialReference spatialReference = spatialReferenceResolution as ISpatialReference;

3.投影坐标系

ISpatialReferenceFactory spatialReferenceFactory = new SpatialReferenceEnvironmentClass();

esriSRProjCS4Type proSystem = esriSRProjCS4Type.esriSRProjCS_Xian1980_3_Degree_GK_Zone_35;

ISpatialReferenceResolution spatialReferenceResolution = spatialReferenceFactory.CreateProjectedCoordinateSystem(Convert.ToInt32(proSystem)) as ISpatialReferenceResolution;

spatialReferenceResolution.ConstructFromHorizon();

ISpatialReferenceTolerance spatialReferenceTolerance = spatialReferenceResolution as ISpatialReferenceTolerance;

spatialReferenceTolerance.SetDefaultXYTolerance();

ISpatialReference spatialReference = spatialReferenceResolution as ISpatialReference;

IFeatureClass pFeatureClass = pFeatureLayer.FeatureClass;

IGeoDataset pGeoDataset = pFeatureClass as IGeoDataset;

ISpatialReference m_spatialReference = pGeoDataset.SpatialReference;