I'm looking for a way to enter two pairs of geographic coordinates (point X
and point Y) and have the over-ground distance between them returned.

Any help?

Dave P

Dave Pitzer wrote:
I'm looking for a way to enter two pairs of geographic coordinates (point X
and point Y) and have the over-ground distance between them returned.

Any help?

Dave P

The standard formula for the great circle distance is:

d=arccos[sin(lat1)*sin(lat2)+cos(lat1)*cos(lat2)*cos(long1-long2)]

There is no magic here; this is simply spherical geometry and
trigonometry at work.

Of course if you don't care about the great circle distance, the answer
can be anything you wish.

73,
Gene
W4SZ

Gene:

Thanks. And for those who wish to enter the coordinates of two points and
have the distance returned (my original request), this is a Web site that
does the caluculation for you:

http://www.indo.com/distance/

Dave P.


"Gene Fuller" wrote in message
news
Dave Pitzer wrote:
I'm looking for a way to enter two pairs of geographic coordinates
(point X
and point Y) and have the over-ground distance between them returned.

Any help?

Dave P

The standard formula for the great circle distance is:

d=arccos[sin(lat1)*sin(lat2)+cos(lat1)*cos(lat2)*cos(long1-long2)]

There is no magic here; this is simply spherical geometry and
trigonometry at work.

Of course if you don't care about the great circle distance, the answer
can be anything you wish.

73,
Gene
W4SZ