IGeometryProject メソッドの使用方法

Private Sub ProjectCoordinates()
    Dim pSpatialReferenceFactory As ISpatialReferenceFactory
    Set pSpatialReferenceFactory = New SpatialReferenceEnvironment

    '変換前の空間参照(地理座標系:WGS1984)
    Dim pGeographicCoordinateSystem As IGeographicCoordinateSystem
    Set pGeographicCoordinateSystem = pSpatialReferenceFactory.CreateGeographicCoordinateSystem(esriSRGeoCSType.esriSRGeoCS_WGS1984)

    '変換後の空間参照(投影座標系:WGS1984 メルカトル)
    Dim pProjectedCoordinateSystem As IProjectedCoordinateSystem
    Set pProjectedCoordinateSystem = pSpatialReferenceFactory.CreateProjectedCoordinateSystem(esriSRProjCS_World_Mercator)

    Dim pPoint As IPoint
    Set pPoint = New point

    Set pPoint.SpatialReference = pGeographicCoordinateSystem   'SpatialReferenceの定義
    pPoint.X = 139.61425781
    pPoint.Y = 35.53222623

    Debug.Print "変換前", pPoint.SpatialReference.Name, "X : " & pPoint.X, "Y : " & pPoint.Y

    pPoint.Project pProjectedCoordinateSystem    '投影変換

    Debug.Print "変換後", pPoint.SpatialReference.Name, "X : " & pPoint.X, "Y : " & pPoint.Y

End Sub