[postgis-users] Interpolation problem

[Saka Royban]

Hi all
I'm not sure whether this can be done completely via PostGIS or it needs some 
programming. Anyway, at this step no problem with programming if Knowing the way 

and algorithm.
I have point shapefile (arranged like a grid) and for each point there is 3 
similar measurements (obtained via 3 transmitters) and, of course, x and y 
coordinates. The problem is that when i have a new point with these 3 measures, 
How can i interpolate its coordinates and specify its location?
Maybe helpful to say, this type of measurement is distance dependent but 
unfortunately i don't know the exact formula.

Any help would be appreciated.
Best Regards
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