[Loadstone] Lattitude and Longitude Distance Calculation

Chris Nestrud ccn at panix.com
Fri Dec 22 18:47:35 GMT 2006


Could you give a pointer on how you calculated the distance?

Chris

On Fri, Dec 22, 2006 at 07:20:01PM +0100, Rob Melchers wrote:
> Distance between:
> Point A (Latitude 34.626563and longitude -84.193983)
> and
> Point B (Latitude 34.631090and longitude -84.195465)
> is:
> 
> 0.521 km, Great Circle formula, and
> 0.52 km, Accurate Ellipsoid formula.
> 
> Point B is at 344.9 degrees, or North North West, from point A.
> 
> 
> At 12/22/2006, you wrote:
> >Can I ask someone to calculate the distance between the two points below?  
> >I
> >am attempting to convert center line data for the Appalachian Trail in
> >preparation to using Loadstone to hike it.  The data file contains
> >over 300,000 points.  The points below represent the first and twentieth
> >points.  I believe I can convert the data myself but don't want to convert
> >over 300,000 points.  First, that would take a great deal of time.  Second,
> >that would probably overwhelm my phone and my ability to deal with the data
> >I would have.  Therefore, I want a representative sample or number of
> >points.  I thought every twentieth point might be a good number to get an
> >idea of the distance between two points.  I intend to use that information
> >to decide how many points to convert.
> >
> >I have good shelter data and will probably get data for other landmarks.
> >There are about 300 shelters in an over 2,000 mile-long trail.  That leaves
> >large gaps about which I have no information.  I want to convert enough
> >center line data to make sure I know where I'm going between named points
> >for which I have data.  I want something similar to the white blazes 
> >sighted
> >people use to hike the same trail.  Any help calculating distances between
> >points would be appreciated.
> >
> >34.626563 -84.193983
> >34.631090 -84.195465
> >
> >Thank You and Happy Holidays,
> >
> >
> >Mike Hanson
> >
> >
> >_______________________________________________
> >Loadstone mailing list
> >Loadstone at loadstone-gps.com
> >http://www.loadstone-gps.com/mailman/listinfo/loadstone

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