<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:times new roman,new york,times,serif;font-size:12pt"><div>Hi all<br>I'm not sure whether this can be done completely via PostGIS or it needs some <br>programming. Anyway, at this step no problem with programming if Knowing the way <br>and algorithm.<br>I have point shapefile (arranged like a grid) and for each point there is 3 <br>similar measurements (obtained via 3 transmitters) and, of course, x and y <br>coordinates. The problem is that when i have a new point with these 3 measures, <br>How can i interpolate its coordinates and specify its location?<br>Maybe helpful to say, this type of measurement is distance dependent but <br>unfortunately i don't know the exact formula.<br><br>Any help would be appreciated.<br>Best Regards</div>
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