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Latitude/longitude computation?

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    Latitude/longitude computation?

    Hi!

    I can find many formulae to compute the bearing and range between two sets of lat/long coordinates.

    However, I wish to find the lat/long of a second point given the coordinates of the first point, and the bearing and distance from the first point to the second point.

    Any help appreciated. Thank you!

    Edit: The distance between the points will be less than 20 nautical miles, so that should simplify the equation.
    Last edited by Hambone70; 04-27-2014 at 09:12 AM.

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    Re: Latitude/longitude computation?

    Maybe this will help

    http://geography.about.com/library/f...ancedegree.htm
    Regards
    Special-K

    Ensure you describe your problem clearly, I have little time available to solve these problems and do not appreciate numerous changes to them.

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    Re: Latitude/longitude computation?

    Here is a formula that I found online. "Lat/Long given radial and distance" is what I'm trying to do. However, I'm having trouble converting it into useful Excel equations.

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    Re: Latitude/longitude computation?

    Quote Originally Posted by Hambone70 View Post
    Hi!

    Edit: The distance between the points will be less than 20 nautical miles, so that should simplify the equation.
    ... and typically are the points used within say the same 1 degree of latitude, and what's the precision required?

    If they're all on the same latitude +/- 1 degree then the longitudinal distance in miles between two points can be fixed (subject to the precision required) and avoid more complicated formulae that would be needed to establish the mileage between two longitudes at any latitude between 0 & 90 degrees. In which case straightforward Euclidean geometry for a flat surface could be used.
    Richard Buttrey

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    Forum Moderator Richard Buttrey's Avatar
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    Re: Latitude/longitude computation?

    Hi,

    Does the attached help
    Attached Files Attached Files

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