C # plane coordinate and latitude/longitude Conversion

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For general space information, see ispatialreferencemspa. Generally, you can obtain

 

ESRI. ArcGIS. Controls. axmapcontrolaxmapcontrol;

Mspa = axmapcontrol. spatialreference;

The projection coordinate system is

Mgeographic = (INT) esrisrgeocstype. esrisrgeocs_wgs1984;

Mproject =
(INT) esrisrprojcstype. esrisrprojcs_beijing1954gk_23n;

The longitude and latitude points are converted to plane coordinates:

Public static ipoint getproject (Double X, Double Y) <br/>{< br/> ispatialreferencefactory2 sprf = new spatialreferenceenvironmentclass (); <br/> ipoint Pt = new pointclass (); <br/> PT. putcoords (x, y); <br/> igeometry GEO = (igeometry) pt; <br/> igeographiccoordinatesystem pgeosys <br/> = sprf. creategeographiccoordinatesystem (mgeographic); <br/> Geo. spatialreference = pgeosys; <br/> // create the plane coordinate system you want to project to <br/> iprojectedcoordinatesystem pprosys <br/> = sprf. createprojectedcoordinatesystem (mspa. factorycode); <br/> Geo. project (pprosys); <br/> return pt; <br/>}< br/>

 

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Coordinate Plane coordinates to latitude and longitude
:

Public static ipoint getgeo (Double X, Double Y) <br/>{< br/> ispatialreferencefactory2 sprf = new spatialreferenceenvironmentclass (); <br/> ipoint Pt = new pointclass (); <br/> PT. putcoords (x, y); <br/> igeometry GEO = (igeometry) pt; <br/> If (null = mspa) <br/>{< br/> iprojectedcoordinatesystem pprosys <br/> = sprf. createprojectedcoordinatesystem (mproject); <br/> Geo. spatialreference = pprosys; <br/>}< br/> else <br/>{< br/> Geo. spatialreference = mspa; <br/>}< br/> igeographiccoordinatesystem pgeosys <br/> = sprf. creategeographiccoordinatesystem (mgeographic); <br/> Geo. project (pgeosys); <br/> return pt; <br/>}< br/>

 

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PS:
Factorycode converts a spatial reference to a corresponding value. Default Value:
0