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Calc new latitude/longitude from polar offset of known point

  1. Sep 2, 2008 #1
    PROBLEM: Find a new point's latitude/longitude given the starting point's latitude/longitude and the polar offset (bearing:degrees-minutes-seconds and distance: xx.xx feet) from that known point.

    My property description is given in bearing/distance from a known point. I can find the known point's latitude/longitude.

    I need to calculate a new point's latitude/longitude given the distance (xx.xx ft) and bearing (degrees-minutes-seconds) from the known point.

    This will enable me to find/approximate my property's borders using my portable gps unit.

    A formula will do. An online calculator would be great.
     
  2. jcsd
  3. Sep 2, 2008 #2

    mgb_phys

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    Resolve the polar bearing into lat and long components, then add these to the starting lat/long.
    If the bearing length is small compared to the earth, you might not need to take spherical triginto account.
     
  4. Sep 2, 2008 #3
    Would you know the formulas for resolving the polar bearing into lat and long components? We're talking about a small 4 acre parcel of land.
     
  5. Sep 3, 2008 #4

    mgb_phys

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    I found an online calculator here http://williams.best.vwh.net/gccalc.htm [Broken]
    scroll down to Compute lat/lon given radial and distance from a known point, you might have to convert the bearing and lat long into decimals.
     
    Last edited by a moderator: May 3, 2017
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