ArcGIS Engine中空间参照(地理坐标)相关方法总结

来自：http://blog.csdn.net/u011170962/article/details/38776101

1.创建空间参考

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1. /// <summary>
2. /// 根据prj文件创建空间参考
3. /// </summary>
4. /// <param name="strProFile">空间参照文件</param>
5. /// <returns></returns>
6. public static ISpatialReference CreateSpatialReference(string strProFile)
7. {
8. ISpatialReferenceFactory pSpatialReferenceFactory = new SpatialReferenceEnvironmentClass();
9. ISpatialReference pSpatialReference = pSpatialReferenceFactory.CreateESRISpatialReferenceFromPRJFile(strProFile);
10. return pSpatialReference;
11. }

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1. /// <summary>
2. /// 创建地理坐标系
3. /// </summary>
4. /// <param name="gcType">esriSRProjCS4Type</param>
5. /// <returns></returns>
6. public static ISpatialReference CreateGeographicCoordinate(esriSRProjCS4Type gcsType)
7. {
8. ISpatialReferenceFactory pSpatialReferenceFactory = new SpatialReferenceEnvironmentClass();
9. ISpatialReference pSpatialReference = pSpatialReferenceFactory.CreateGeographicCoordinateSystem((int)gcsType);
10. return pSpatialReference;
11. }

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1. /// <summary>
2. /// 创建投影坐标系
3. /// </summary>
4. /// <param name="pcType">esriSRProjCS4Type</param>
5. /// <returns></returns>
6. public static ISpatialReference CreateProjectedCoordinate(esriSRProjCS4Type pcsType)
7. {
8. ISpatialReferenceFactory2 pSpatialReferenceFactory = new SpatialReferenceEnvironmentClass();
9. ISpatialReference pSpatialReference = pSpatialReferenceFactory.CreateProjectedCoordinateSystem((int)pcsType);
10. return pSpatialReference;
11. }

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1. /// <summary>
2. /// 获取空投影
3. /// </summary>
4. /// <returns></returns>
5. public static ISpatialReference CreateUnKnownSpatialReference()
6. {
7. ISpatialReference pSpatialReference = new UnknownCoordinateSystemClass();
8. pSpatialReference.SetDomain(0, 99999999, 0, 99999999);//设置空间范围
9. return pSpatialReference;
10. }

2.获取空间参考

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1. /// <summary>
2. /// 获取要素集空间参考
3. /// </summary>
4. /// <param name="pFeatureDataset">要素集</param>
5. /// <returns></returns>
6. public static ISpatialReference GetSpatialReference(IFeatureDataset pFeatureDataset)
7. {
8. IGeoDataset pGeoDataset = pFeatureDataset as IGeoDataset;
9. ISpatialReference pSpatialReference = pGeoDataset.SpatialReference;
10. return pSpatialReference;
11. }

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1. /// <summary>
2. /// 获取要素层空间参考
3. /// </summary>
4. /// <param name="pFeatureLayer">要素层</param>
5. /// <returns></returns>
6. public static ISpatialReference GetSpatialReferenc(IFeatureLayer pFeatureLayer)
7. {IFeatureClass pFeatureClass = pFeatureLayer.FeatureClass;
8. IGeoDataset pGeoDataset = pFeatureClass as IGeoDataset;
9. ISpatialReference pSpatialReference = pGeoDataset.SpatialReference;
10. return pSpatialReference;
11. }

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1. /// <summary>
2. /// 获取要素类空间参考
3. /// </summary>
4. /// <param name="pFeatureClass">要素类</param>
5. /// <returns></returns>
6. public static ISpatialReference GetSpatialReference(IFeatureClass pFeatureClass)
7. {
8. IGeoDataset pGeoDataset = pFeatureClass as IGeoDataset;
9. ISpatialReference pSpatialReference = pGeoDataset.SpatialReference;
10. return pSpatialReference;
11. }

3.修改空间参考

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1. /// <summary>
2. /// 修改要素集空间参考
3. /// </summary>
4. /// <param name="pFeatureDataset">要素集</param>
5. /// <param name="pSpatialReference">新空间参考</param>
6. public static void AlterSpatialReference(IFeatureDataset pFeatureDataset, ISpatialReference pSpatialReference)
7. {
8. IGeoDataset pGeoDataset = pFeatureDataset as IGeoDataset;
9. IGeoDatasetSchemaEdit pGeoDatasetSchemaEdit = pGeoDataset as IGeoDatasetSchemaEdit;
10. if (pGeoDatasetSchemaEdit.CanAlterSpatialReference == true)
11. pGeoDatasetSchemaEdit.AlterSpatialReference(pSpatialReference);
12. }

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1. /// <summary>
2. /// 修改要素类空间参考
3. /// </summary>
4. /// <param name="pFeatureClass">要素类</param>
5. /// <param name="pSpatialReference">新空间参考</param>
6. public static void AlterSpatialReference(IFeatureClass pFeatureClass, ISpatialReference pSpatialReference)
7. {
8. IGeoDataset pGeoDataset = pFeatureClass as IGeoDataset;
9. IGeoDatasetSchemaEdit pGeoDatasetSchemaEdit = pGeoDataset as IGeoDatasetSchemaEdit;
10. if (pGeoDatasetSchemaEdit.CanAlterSpatialReference == true)
11. pGeoDatasetSchemaEdit.AlterSpatialReference(pSpatialReference);
12. }