c# Math Function: Calculating New Distance (Lat/Lon)

David Smith

Lat = 33.456

Lon = -124.345

I have a Lat and Lon, which is an Edge Point. I want to take the edge point and create another edge point 250m away from'

the first Lat and Lon.

Which math function will I use to do this in C#. Can someone help me with this logic ?

2 Replies

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David Smith10y ago
I dont understand you logic below. I am using c#. I am english
Nilesh Sawardekar10y ago
1. Haversine
2. formula:a=sin²(Δφ/2)+cosφ1⋅cosφ2⋅sin²(Δλ/2)
3. c=2⋅atan2(√a,√(1−a))
4. d=R⋅c
5. whereφislatitude,λislongitude,Risearth’sradius(meanradius=6,371km);
6. notethatanglesneedtobeinradianstopasstotrigfunctions!
7. JavaScript:
8. varR=6371e3;//metres
9. varφ1=lat1.toRadians();
10. varφ2=lat2.toRadians();
11. varΔφ=(lat2-lat1).toRadians();
12. varΔλ=(lon2-lon1).toRadians();
14. vara=Math.sin(Δφ/2)*Math.sin(Δφ/2)+
15. Math.cos(φ1)*Math.cos(φ2)*
16. Math.sin(Δλ/2)*Math.sin(Δλ/2);
17. varc=2*Math.atan2(Math.sqrt(a),Math.sqrt(1-a));
19. vard=R*c;