Summary of spatial reference (geographic coordinates) methods in ArcGIS Engine

1. Create a space reference

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1. /// <Summary>
2. /// Create a space based on the prj file reference
3. /// </Summary>
4. /// <Param name = "strprofile"> space reference file </param>
5. /// <Returns> </returns>
6. Public static ispatialreference createspatialreference (string strprofile)
7. {
8. Ispatialreferencefactory pspatialreferencefactory = new spatialreferenceenvironmentclass ();
9. Ispatialreference pspatialreference = pspatialreferencefactory. createesrispatialreferencefromp1_file (strprofile );
10. Return pspatialreference;
11. }

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1. /// <Summary>
2. /// Create a geographic coordinate system
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. /// Create a projection Coordinate System
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. /// Obtain an empty projection
3. /// </Summary>
4. /// <Returns> </returns>
5. Public static ispatialreference createunknownspatialreference ()
6. {
7. Ispatialreference pspatialreference = new unknowncoordinatesystemclass ();
8. Pspatialreference. setdomain (0, 99999999, 0, 99999999); // set the Space Range
9. Return pspatialreference;
10. }

2. Get space reference

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1. /// <Summary>
2. /// Element set space reference
3. /// </Summary>
4. /// <Param name = "pfeaturedataset"> element set </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. /// Obtain the element Layer Space reference
3. /// </Summary>
4. /// <Param name = "pfeaturelayer"> element layer </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. /// Element class space reference
3. /// </Summary>
4. /// <Param name = "pfeatureclass"> element class </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. Modify space reference

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1. /// <Summary>
2. /// Reference for modifying the element set space
3. /// </Summary>
4. /// <Param name = "pfeaturedataset"> element set </param>
5. /// <Param name = "pspatialreference"> New Space reference </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. /// Modify element class space reference
3. /// </Summary>
4. /// <Param name = "pfeatureclass"> element class </param>
5. /// <Param name = "pspatialreference"> New Space reference </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. }

Summary of spatial reference (geographic coordinates) methods in ArcGIS Engine