Would not there be isolines of the same signal strength? In that case there is no unique x,y for a given signal strength... On 2011-06-21 9:54 PM, "Saka Royban" <[email protected]> wrote: > 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
_______________________________________________ postgis-users mailing list [email protected] http://postgis.refractions.net/mailman/listinfo/postgis-users
