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I have done coding of Trilateration following this example and it was really very helpful. One small help I need is. The results (X, Y, Z) returned here are based in Earth Coordinate Systems. I need to convert it into local coordinate system to place it in a map. I have found some suggestion of converting to local coordinate from lat long(For example : this). But I was just wondering is it possible to change the coordinate directly from the Earth coordinate system?

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Pow
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  • You'll have specify the map's [projection](http://en.wikipedia.org/wiki/Map_projection), for example [UTM](http://en.wikipedia.org/wiki/Universal_Transverse_Mercator_coordinate_system).. – trashgod Jun 25 '11 at 02:46

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Yes, assuming your local coordinates are East, North, Up (ENU):

http://en.wikipedia.org/wiki/Geodetic_system#From_ECEF_to_ENU

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