I want to calculate GPS coordinates of a point, which is located at some specified distance and angle from another point whose GPS coordinates are known. For example I want GPS coordinate of point B located at a distance of 50 meter, and at an angle 70 degrees from point A on 2D plane. I assume that GPS coordinate of point A are know. Please Help.
Dear Tariq,
you might find the following link useful:
https://en.wikipedia.org/wiki/Geographic_coordinate_conversion
If the point B is not too far from the point A (< 500 nm) the orthodromic course is almost confused with loxodromy then it is not necessary to precise what kind of distance you consider. In this case, you can apply the formulas of
http://robert.rolland.acrypta.com/telechargements/navigation/navigation.pdf
The text is in french but you only need the very last formula page 23 to compute the latitude $\phi_B$ of B, then the formula 7 page 21 to get the longitude $G_B$ of B. Note that in these formulas cv denotes the heading of your course, the angles are in radians and the distances in nautic miles.
If you have geodetic coordinates of point A and geodetic azimuth and distance of point B from A, you can use the direct geodetic formulas.
http://www.ngs.noaa.gov/TOOLS/Inv_Fwd/Inv_Fwd.html
note that the distance is the geodesic distance (reduction to datum surface is necessary).
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