Distance Calculator

[PatrikL]

This sub is usable in GPS programs -

Sub Calc
result.Text = sqrt(69.1 * (Lat2.Text - Lat1.Text) * 69.1 * (Lat2.Text - Lat1.Text) + 69.1 * (Lon2.Text - Lon1.Text) * cos(lat1.Text/57.3) * 69.1 * (Lon2.Text - Lon1.Text) * cos(lat1.Text/57.3))
End Sub

(Source: http://www.meridianworlddata.com/Distance-Calculation.asp )
- create 5x TextBox - Lat1,2; Lon1,2; result and one Button - Calc
My sample is here:

 

[sho431]

Hi PatrikL

very good sample, but what about the direction.


Thanks
shooshan

 

[PatrikL]

Good idea, i try to find formula via google

 

[sho431]

Good idea, i try to find formula via google

I need :sign0085:

distanceEast=(Lon2.Text - Lon1.Text) 
distanceNorth=(Lat2.Text - Lat1.Text)
direction= Atan(distanceNorth/distanceEast) Mod (2 * cPI)
direction = (direction)*(180/cPI)
If direction < 0 Then
direction+= 360
  End If

 

[Erel]

There is no += in Basic4ppc.

 

[PatrikL]

2 sho431
- i try repair that sub, but it don't work :sign0085:
From where is that formula?

 

[sho431]

Hi

:sign0013:

From this

http://www.tma.dk/gps/#calcdir

 

[PatrikL]

Thanks, i will look at it.