Originally Posted by icefreez

You also have to take into consideration hareware and software delays. You would have to set your GPS and your wireless card to scan at the fastest rates possible.

I know on my wireless card I have driven by a location where I know an AP is located, and NetStumbler will not detect that AP visually untill I have almost passed it. This would hinder any kind of triangulation script and throw the center off by quite a bit depending on how fast your driving.

Also any kind of averaging would not work in a triangulation script. You would definantly have to calculate the mean or throw out several locations out of the general range of data, to try and compensate for the obstructions inbetween you and the AP.