yes, of course.there is a unique x,y for each triple measurements. This measurements are, in fact, Received Signal Strength so it means more distance less RSS value.
________________________________ From: Chris Hermansen <[email protected]> To: PostGIS Users Discussion <[email protected]> Sent: Wed, June 22, 2011 8:35:05 AM Subject: Re: [postgis-users] Interpolation problem What are the three measurements? Is it reasonable to assume that knowing three measurement values tells you the location ie is there a unique x,y for each triple of measurements? On 2011-06-21 8:54 PM, "Saka Royban" <[email protected]> wrote: > 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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