Module: Distance in Category Geospatial Mapping : Addresses and Distances from Total Visual SourceBook

' Example of modDistance
'
' To use this example, create a new module and paste this code into it.
' Then run the procedure by putting the cursor in the procedure and pressing:
'    F5 to run it, or
'    F8 to step through it line-by-line (see the Debug menu for more options)

Private Sub Example_modDistance()
  ' Comments: Examples of using the modDistance routines to measure the distance between two points in VBA and VB6.
  '           See the results in the Immediate Window.

  ' These are sample locations.
  ' To get values for a particular location, use the LatitudeLongitudeFromAddress function in the modGoogleMapsAPI module

  ' Location of the White House in Washington, DC
  Const cdblLatitude1 As Double = 38.8976831
  Const cdblLongitude1 As Double = -77.0364972

  ' Location of the Sydney Opera House, Australia
  Const cdblLatitude2 As Double = -33.857767
  Const cdblLongitude2 As Double = 151.2149929

  ' Location of Microsoft in Redmond, WA
  Const cdblLatitude3 As Double = 47.6447015
  Const cdblLongitude3 As Double = -122.1301371

  ' Location of the Forbidden City in Beijing, China
  Const cdblLatitude4 As Double = 39.91559
  Const cdblLongitude4 As Double = 116.396977

  ' Location of FMS offices at 8150 Leesburg Pike, Vienna, VA 22182, USA
  Const cdblLatitude5 As Double = 38.9165052
  Const cdblLongitude5 As Double = -77.2259664

  ' DistanceCosines: Calculate the arc distance between two latitude/longitude points based on the spherical law of cosines
  Debug.Print "Distance using the law of cosines between the White House and Syndey Opera House"
  Debug.Print DistanceCosines("M", cdblLatitude1, cdblLongitude1, cdblLatitude2, cdblLongitude2) & " miles"
  Debug.Print DistanceCosines("K", cdblLatitude1, cdblLongitude1, cdblLatitude2, cdblLongitude2) & " kilometers"
  Debug.Print DistanceCosines("N", cdblLatitude1, cdblLongitude1, cdblLatitude2, cdblLongitude2) & " nautical miles"
  Debug.Print

  ' DistanceHaversine: Calculate the distance between two latitude/longitude points based on the Haversine formula
  Debug.Print "Distance using the Haversine formula between the White House and Syndey Opera House"
  Debug.Print DistanceHaversine("M", cdblLatitude1, cdblLongitude1, cdblLatitude2, cdblLongitude2) & " miles"
  Debug.Print DistanceHaversine("K", cdblLatitude1, cdblLongitude1, cdblLatitude2, cdblLongitude2) & " kilometers"
  Debug.Print DistanceHaversine("N", cdblLatitude1, cdblLongitude1, cdblLatitude2, cdblLongitude2) & " nautical miles"
  Debug.Print

  ' DistanceCosines: Calculate the arc distance between two latitude/longitude points based on the spherical law of cosines
  Debug.Print "Distance using the law of cosines between FMS and the White House"
  Debug.Print DistanceCosines("M", cdblLatitude1, cdblLongitude1, cdblLatitude5, cdblLongitude5) & " miles"
  Debug.Print DistanceCosines("K", cdblLatitude1, cdblLongitude1, cdblLatitude5, cdblLongitude5) & " kilometers"
  Debug.Print DistanceCosines("N", cdblLatitude1, cdblLongitude1, cdblLatitude5, cdblLongitude5) & " nautical miles"
  Debug.Print

  ' DistanceHaversine: Calculate the distance between two latitude/longitude points based on the Haversine formula
  Debug.Print "Distance using the law of cosines between FMS and the White House"
  Debug.Print DistanceHaversine("M", cdblLatitude1, cdblLongitude1, cdblLatitude5, cdblLongitude5) & " miles"
  Debug.Print DistanceHaversine("K", cdblLatitude1, cdblLongitude1, cdblLatitude5, cdblLongitude5) & " kilometers"
  Debug.Print DistanceHaversine("N", cdblLatitude1, cdblLongitude1, cdblLatitude5, cdblLongitude5) & " nautical miles"

End Sub

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