Find distance between two points on Earth

[Mk]

How could you find the distance between two points, such as
N12° 34.567 W12° 34.567
and
N12° 34.568 W12° 34.567?

 

[chroot]

Use a great circle.

http://gc.kls2.com/

- Warren

 

[dextercioby]

Wow, how interesting, i didn't see this thread when i posted mine.

Anyway, i guess my treatment of the subject is quite accessible.

Daniel.

 

[itsbob]

http://www.chemical-ecology.net/java/lat-long.htm

Even a better place..

 

[itsbob]

0.0011506641413132668 miles
or 6.076 feet

 

[itsbob]

How could you find the distance between two points, such as
N12° 34.567 W12° 34.567
and
N12° 34.568 W12° 34.567?

Be careful though, becasue you have a mixed lat long.. you have to convert the decimal of minutes to minutes and seconds. 34.567 minutes = 34 Minutes 34.02 seconds(.567 * 60)..

 

[Mk]

Guys, I wanted to know how I could get the answer, not for you to tell me or give me an app to do do it for me.

 

[chroot]

Use a great circle. The equation is given here:

http://mathworld.wolfram.com/GreatCircle.html

- Warren

 

[myspip]

"Unfortunately, the flattening of the Earth cannot be taken into account in this simple derivation, since the problem is considerably more complicated for a spheroid or ellipsoid (each of which has a radius which is a function of latitude). This leads to extremely complicated expressions for oblate spheroid geodesics and geodesics on other ellipsoids."
So you won't get the most accurate solutions; but that's no problem if dealing with relatively short distances.