Find distance between two points on Earth


by Mk
Tags: distance, earth, points
Mk
Mk is offline
#1
Aug7-06, 02:45 PM
P: 2,057
How could you find the distance between two points, such as
N12 34.567 W12 34.567
and
N12 34.568 W12 34.567?
Phys.Org News Partner Mathematics news on Phys.org
Researchers help Boston Marathon organizers plan for 2014 race
'Math detective' analyzes odds for suspicious lottery wins
Pseudo-mathematics and financial charlatanism
chroot
chroot is offline
#2
Aug7-06, 02:56 PM
Emeritus
Sci Advisor
PF Gold
chroot's Avatar
P: 10,424
Use a great circle.

http://gc.kls2.com/

- Warren
dextercioby
dextercioby is offline
#3
Aug8-06, 04:39 AM
Sci Advisor
HW Helper
P: 11,863
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
itsbob is offline
#4
Aug8-06, 02:43 PM
P: 4

Find distance between two points on Earth


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

Even a better place..
itsbob
itsbob is offline
#5
Aug8-06, 02:48 PM
P: 4
0.0011506641413132668 miles
or 6.076 feet
itsbob
itsbob is offline
#6
Aug8-06, 02:50 PM
P: 4
Quote Quote by 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?
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
Mk is offline
#7
Aug8-06, 04:26 PM
P: 2,057
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
chroot is offline
#8
Aug8-06, 04:35 PM
Emeritus
Sci Advisor
PF Gold
chroot's Avatar
P: 10,424
Use a great circle. The equation is given here:

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

- Warren
myspip
myspip is offline
#9
Aug10-06, 01:11 AM
P: 6
"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.


Register to reply

Related Discussions
2 focal points, find image distance. Introductory Physics Homework 2
Calculating distance between two points in potential Special & General Relativity 3
Distance problem, Using Launcher need to find objects distance Introductory Physics Homework 2
Locus of points with distance sum =8 Introductory Physics Homework 5
shortest distance between two points. Line? Calculus 1