ON 20050926@9:19:34 AM at page:
http://techref.massmind.org/techref/io/sensor/pos/gps.htm#38621.388587963
Elkin Dario Gonzalez Sierra[EDG-TK-FKI] Says

I've been looking for the equation for finding the distance between two<BR>
cities, given the latitude and longitude of both cities. For example: what <BR>
is the formula one would use to find the distance between San Francisco <BR>
(N37 37' 00&quot; latitude, W122 22' 00&quot; longitude) and Paris (N48 44' 00&quot; <BR>
latitude, E02 23' 00&quot; longitude.)<BR>
<BR>
<BR>
The equation to implement is:<BR>
<BR>
A = LAT1, B = LONG1<BR>
C = LAT2, D = LONG2 (all converted to radians: degree/57.29577951)<BR>
<BR>
IF A = C AND B = D THEN DISTANCE = 0; <BR>
ELSE<BR>
<BR>
IF [SIN(A)SIN(C) COS(A)COS(C)COS(B-D)] &gt; 1 THEN DISTANCE = <BR>
3963.1*ARCOS[1]; /* solved a prob I ran into. I haven't fully <BR>
analyzed it yet */ <BR>
ELSE<BR>
<BR>
DISTANCE=3963.1*ARCOS[SIN(A)SIN(C) COS(A)COS(C)COS(B-D)];<BR>
<BR>
<BR>
I'm trying to write a program for the 18F452 PIC micro that will include this distance calculation in it.<BR>
<BR>
Any help that members of &quot;The PIC List&quot; can offer would be greatly appreciated.<BR>
<BR>
<BR>
Elkin Dario Gonzalez Sierra<BR>
Bogota (COLOMBIA)<BR>




ON 20050926@3:35:30 PM at page:
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James Newton[JMN-EFP-786] See:
/techref/datafile/location.htm
Location Data, Physical Address



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