角度の相互変換

'角度の相互変換
'esriDirectionType
'   esriDTNorthAzimuth      :北方位角（北から時計回りの角度）
'   esriDTSouthAzimuth      :南方位角（南から時計回りの角度）
'   esriDTPolar             :極座標角（東から反時計回りの角度）
'   esriDTQuadrantBearing   :四分円方位角（指定した四方位から指定方位に向いた角度[eg,S 45 E]）
Private Function GetAzimuthalToGeneral(ByVal Value As Variant, _
                                        Optional ByVal InputType As esriDirectionType = esriDTNorthAzimuth, _
                                        Optional ByVal OutputType As esriDirectionType = esriDTPolar, _
                                        Optional ByVal Precision As Long = 0) As Variant
 
    Dim pAngularConverter As IAngularConverter
    Set pAngularConverter = New AngularConverter
     
    pAngularConverter.SetString Value, InputType, esriDUDecimalDegrees
     
    Select Case OutputType
    Case esriDTQuadrantBearing
        GetAzimuthalToGeneral = pAngularConverter.GetString(OutputType, esriDUDecimalDegrees, Precision)
         
    Case Else
        GetAzimuthalToGeneral = pAngularConverter.GetAngle(OutputType, esriDUDecimalDegrees)
         
    End Select
          
End Function