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Converting Decimal Degrees to Degrees/Minutes/Seconds
The following Microsoft Visual Basic for Applications custom function
accepts an angle formatted as a decimal value and convert it to a text
value displayed in degrees, minutes, and seconds.
Function Convert_Degree(Decimal_Deg) As Variant
With Application
'Set degree to Integer of Argument Passed
Degrees = Int(Decimal_Deg)
'Set minutes to 60 times the number to the right
'of the decimal for the variable Decimal_Deg
Minutes = (Decimal_Deg - Degrees) * 60
'Set seconds to 60 times the number to the right of the
'decimal for the variable Minute
Seconds = Format(((Minutes - Int(Minutes)) * 60), "0")
'Returns the Result of degree conversion
'(for example, 10.46 = 10~ 27 ' 36")
Convert_Degree = " " & Degrees & "~ " & Int(Minutes) & "' " _
& Seconds + Chr(34)
End With
End Function
To use this function, create a conversion formula, as in the following
example:
=Convert_Degree(10.46)
This formula will return 10~ 27' 36" (that is, 10 degrees, 27 minutes, 36
seconds).
Converting Degrees/Minutes/Seconds to Decimal Degrees
The following Microsoft Visual Basic for Applications custom function
accepts a text string of degrees, minutes and seconds formatted in the
exact same format that the Convert_Degree function returns (for example,
10~ 27' 36") and converts it to an angle formatted as a decimal value. This
is exactly the reverse of the Convert_Degree custom function.
WARNING: This custom function fails if the Degree_Deg argument does not
follow the format of the following:
<degrees>~ <minutes>' <seconds>"
as stated earlier.
Function Convert_Decimal(Degree_Deg As String) As Double
' Declare the variables to be double precision floating-point.
Dim degrees As Double
Dim minutes As Double
Dim seconds As Double
' Set degree to value before "~" of Argument Passed.
degrees = Val(Left(Degree_Deg, InStr(1, Degree_Deg, "~") - 1))
' Set minutes to the value between the "~" and the "'"
' of the text string for the variable Degree_Deg divided by
' 60. The Val function converts the text string to a number.
minutes = Val(Mid(Degree_Deg, InStr(1, Degree_Deg, "~") + 2, _
InStr(1, Degree_Deg, "'") - InStr(1, Degree_Deg, _
"~") - 2)) / 60
' Set seconds to the number to the right of "'" that is
' converted to a value and then divided by 3600.
seconds = Val(Mid(Degree_Deg, InStr(1, Degree_Deg, "'") + _
2, Len(Degree_Deg) - InStr(1, Degree_Deg, "'") - 2)) _
/ 3600
Convert_Decimal = degrees + minutes + seconds
End Function
To use this function, create a conversion formula, as in the following
example:
=Convert_Degree("10~ 27' 36""")
This formula will return 10.46 (that is, 10.46 degrees).
NOTE: You are required to type three quotation marks (""") at the end of
argument of this formula to balance the quotation mark for the seconds
and the quotation mark for the text string.