# [thelist] Longitude conversion

Mike Migurski mike at saturn5.com
Fri Dec 7 11:38:05 CST 2001

```hi,

The distance covered by one minute of long. is proportional to that
covered by one minute of lat. by the cosine of the angle from the equator.
Angle from the the equator is given directly by long., so:

cos( long. ) * 6080ft

http://www.mathforum.com/dr.math/problems/longandlat.html

-mike.

>Hi,
>Can anyone help with this,
>I want to translate the difference between two Lon/Lat coords into feet.
>
>I understand that 1 minute latitude is 6080 feet.
>And that 1 minute Longitude will be less than this, depending on how far
>from the pole it is.
>
>Does anyone know the formula to determine this?
>
>Thanks,
>Richard.
>
>
>
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