Question

Longitude Latitude distance calculation

Asked by: hihagen

I am doing an application in Xcode with Applescript and shell scripts ...
... do anyone know how I can get a distance between two points (long1, lat1, long2, lat2)
based on this formula (with apple or shell script?):

Distance between points:
The great circle distance d between two points with coordinates {lat1,lon1} and {lat2,lon2} is given by:

d=acos(sin(lat1)*sin(lat2)+cos(lat1)*cos(lat2)*cos(lon1-lon2))

A mathematically equivalent formula, which is less subject to rounding error for short distances is:

d=2*asin(sqrt((sin((lat1-lat2)/2))^2 +
                 cos(lat1)*cos(lat2)*(sin((lon1-lon2)/2))^2))

Thanks!

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Asked On
2005-04-01 at 20:11:34ID21373730
Tags

circle

,

distance

,

formula

,

latitude

,

longitude

Topic

General Macintosh Programming

Participating Experts
1
Points
125
Comments
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Answers

 

Accepted Solution

by: ozoPosted on 2005-04-04 at 00:58:02ID: 13695685

Rank: Savant

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Expert Comment

by: hihagenPosted on 2005-04-04 at 19:51:03ID: 13703778

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20120131-EE-VQP-001

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