Summary of methods related to spatial references (geographical coordinates) in the ArcGIS engine

A summary of the methods related to spatial references (geographical coordinates) in the original ArcGIS engine

1. Create a spatial reference

[CSharp]View Plaincopy print?

2. <summary>
4. Create a spatial reference based on the prj file
6. </summary>
8. <param name= "Strprofile" > Spatial reference Files </param>
10. <returns></returns>
12. Public static Ispatialreference createspatialreference (string strprofile)
14. {
16. Ispatialreferencefactory pspatialreferencefactory = new Spatialreferenceenvironmentclass ();
18. Ispatialreference pspatialreference = Pspatialreferencefactory.createesrispatialreferencefromprjfile (strProFile);
20. return pspatialreference;
22. }

[CSharp]View Plaincopy print?

2. <summary>
4. Create a geographic coordinate system
6. </summary>
8. <param name= "Gctype" >esriSRProjCS4Type</param>
10. <returns></returns>
12. Public static Ispatialreference creategeographiccoordinate (Esrisrprojcs4type gcstype)
14. {
16. Ispatialreferencefactory pspatialreferencefactory = new Spatialreferenceenvironmentclass ();
18. Ispatialreference pspatialreference = Pspatialreferencefactory.creategeographiccoordinatesystem ((int) gcsType)  ;
20. return pspatialreference;
22. }

[CSharp]View Plaincopy print?

2. <summary>
4. Create a projected coordinate system
6. </summary>
8. <param name= "Pctype" >esriSRProjCS4Type</param>
10. <returns></returns>
12. Public static Ispatialreference createprojectedcoordinate (Esrisrprojcs4type pcstype)
14. {
16. ISpatialReferenceFactory2 pspatialreferencefactory = new Spatialreferenceenvironmentclass ();
18. Ispatialreference pspatialreference = Pspatialreferencefactory.createprojectedcoordinatesystem ((int) pcsType);
20. return pspatialreference;
22. }

[CSharp]View Plaincopy print?

2. <summary>
4. Get an empty projection
6. </summary>
8. <returns></returns>
10. Public static Ispatialreference createunknownspatialreference ()
12. {
14. Ispatialreference pspatialreference = new Unknowncoordinatesystemclass ();
16. Pspatialreference.setdomain (0, 99999999, 0, 99999999); //Set Space range
18. return pspatialreference;
20. }

2. Get a spatial reference

[CSharp]View Plaincopy print?

2. <summary>
4. Get feature set spatial reference
6. </summary>
8. <param name= "Pfeaturedataset" > Feature set </param>
10. <returns></returns>
12. Public static Ispatialreference getspatialreference (Ifeaturedataset pfeaturedataset)
14. {
16. Igeodataset Pgeodataset = Pfeaturedataset as igeodataset;
18. Ispatialreference pspatialreference = pgeodataset.spatialreference;
20. return pspatialreference;
22. }

[CSharp]View Plaincopy print?

2. <summary>
4. Get feature layer spatial reference
6. </summary>
8. <param name= "Pfeaturelayer" > Feature layer </param>
10. <returns></returns>
12. Public static Ispatialreference Getspatialreferenc (Ifeaturelayer pfeaturelayer)
14. {Ifeatureclass Pfeatureclass = Pfeaturelayer.featureclass;
16. Igeodataset Pgeodataset = Pfeatureclass as igeodataset;
18. Ispatialreference pspatialreference = pgeodataset.spatialreference;
20. return pspatialreference;
22. }

[CSharp]View Plaincopy print?

2. <summary>
4. Get feature class spatial reference
6. </summary>
8. <param name= "Pfeatureclass" > Feature class </param>
10. <returns></returns>
12. Public static Ispatialreference getspatialreference (Ifeatureclass pfeatureclass)
14. {
16. Igeodataset Pgeodataset = Pfeatureclass as igeodataset;
18. Ispatialreference pspatialreference = pgeodataset.spatialreference;
20. return pspatialreference;
22. }

3. Modify the spatial reference

[CSharp]View Plaincopy print?

2. <summary>
4. Modifying a feature set spatial reference
6. </summary>
8. <param name= "Pfeaturedataset" > Feature set </param>
10. <param name= "Pspatialreference" > New Space Reference </param>
12. Public static void Alterspatialreference (Ifeaturedataset pfeaturedataset, ispatialreference pspatialreference)
14. {
16. Igeodataset Pgeodataset = Pfeaturedataset as igeodataset;
18. Igeodatasetschemaedit Pgeodatasetschemaedit = Pgeodataset as igeodatasetschemaedit;
20. if (pgeodatasetschemaedit.canalterspatialreference = = true)
22. Pgeodatasetschemaedit.alterspatialreference (pspatialreference);
24. }

[CSharp]View Plaincopy print?

2. <summary>
4. Modifying a feature class spatial reference
6. </summary>
8. <param name= "Pfeatureclass" > Feature class </param>
10. <param name= "Pspatialreference" > New Space Reference </param>
12. Public static void Alterspatialreference (Ifeatureclass pfeatureclass, ispatialreference pspatialreference)
14. {
16. Igeodataset Pgeodataset = Pfeatureclass as igeodataset;
18. Igeodatasetschemaedit Pgeodatasetschemaedit = Pgeodataset as igeodatasetschemaedit;
20. if (pgeodatasetschemaedit.canalterspatialreference = = true)
22. Pgeodatasetschemaedit.alterspatialreference (pspatialreference);
24. }

Summary of methods related to spatial references (geographical coordinates) in the ArcGIS engine