AE+c#要素类，地理坐标系和投影坐标系的设置

最新推荐文章于 2022-04-07 13:24:17 发布

原创最新推荐文章于 2022-04-07 13:24:17 发布 · 4k 阅读

2 ·

CC 4.0 BY-SA版权

ArcGIS Engine 专栏收录该内容

26 篇文章

订阅专栏

本文深入探讨GIS坐标系统的基础知识，包括空坐标系、地理坐标系与投影坐标系的构造方法及应用。通过实例代码展示了如何创建不同类型的坐标系，并解释了其在GIS领域的实际意义。

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;