# NavList:

## A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

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Re: Formula for dis. between two points on the Globe
From: Noel Casey
Date: 1996 Oct 25, 05:51 EDT

```At 09:35 21/10/96 EST, you wrote:
>Vincent Rouwhorst <106016.1607@XXX.XXX> writes:
>>Is there somebody that hase the Formula to calculate the distans
>>between two points on the globe.
>>
>>eg. 52 29.66N  and 52 32.86N
>>    005 02.45E     004 40.67E
>>
>>My GPS tells me that it is 13.6nm        CTS106
---------
---------
>dist = 6366.7*Arccos(sin(lata)*sin(latb)+cos(lata)*cos(latb)*cos(lonb-lona))
??????
??????
The equation above is incorrrect.
--------
The above equation should read for the Great Circle Distance between Points
A and B
located as;
A at location (Lat_A, Lon_A) and B at  (Lat_B, Lon_B)
Distance A to B = 60*ArcCos[Sin(Lat_A)*Sin(Lat_B) + Cos(Lat_A)*Cos(Lat_B) *
Cos(Lon_A -Lon_B)]
The result is in nautical miles.
--------
Regards,

|"""""|
( @ @ )
-oooO----(_)----Oooo-
caseynf@XXX.XXX
```
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