[thelist] Longitude conversion

[Mike Migurski]

hi,

short answer:

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

long answer:

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.
>
>
>
>---------------------------------------
>For unsubscribe and other options, including
>the Tip Harvester and archive of TheList go to:
>http://lists.evolt.org Workers of the Web, evolt !
>

--------------------------------------------------------------------------
                   michal migurski     mike at saturn5.com
                  tel:650.624.8552     AIM:migurski
       http://www.saturn5.com/mike     ICQ:47513232
--------------------------------------------------------------------------
        We're lying in the gutter, but we're looking at the stars.
--------------------------------------------------------------------------