| [Q]: How to calculate distance from GPS measurements [message #6099] |
Fri, 22 March 1996 00:00 |
uuvince
Messages: 6
Registered: June 1991
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Junior Member |
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I am working on a project where I will be receiving measurements from the Global
Positioning System, presumably latitude and longitude measurements, and I will
need to calculate the distances between the measurement points. The measurements
will all be taken over a region of only a few miles so I guess I could assume
the earth is flat over this region and just calculate the straight line
distance. But I was wondering if anyone could help me with a more mathematically
rigorous method for calculating distance from pairs of latitude/longitude
measurements?
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| Vince Scullin | Never attribute to malice that |
| Software Engineering Branch | which can be adequately explained |
| NASA Lewis Research Center | by ignorance. |
| Cleveland, Ohio 44135 | uuvince@ariel.lerc.nasa.gov |
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| Re: [Q]: How to calculate distance from GPS measurements [message #6100 is a reply to message #6099] |
Fri, 22 March 1996 00:00  |
Kile_Baker
Messages: 5
Registered: March 1994
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Junior Member |
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In article <22MAR199612092665@ariel.lerc.nasa.gov>,
uuvince@ariel.lerc.nasa.gov (Vince Scullin) wrote:
> I am working on a project where I will be receiving measurements from
the Global
> Positioning System, presumably latitude and longitude measurements, and I will
> need to calculate the distances between the measurement points. The
measurements
> will all be taken over a region of only a few miles so I guess I could assume
> the earth is flat over this region and just calculate the straight line
> distance. But I was wondering if anyone could help me with a more
mathematically
> rigorous method for calculating distance from pairs of latitude/longitude
> measurements?
>
>
Although I am sure that any textbook on surveying would have this information,
you can look into working with spherical triangles. This will work as long
as you assume that you are on a spherical earth at a constant height
(such as sea level).
The equations for working with spherical triangles can be found in
the CRC standard math tables books.
--
Kile Baker (kile_baker@jhuapl.edu) | All opinions are my own and
Johns Hopkins Applied Phys. Lab | not those of the JHU/APL
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