Wifi Triangulation

Question

What would be the best way to triangulate a wireless network passively. Are there tools available? Algorithms? Libraries?

My goal would be to create a relative map o

Answer 1

Instead of trilateration you could use bilinear interpolation. This is said to be better for non-linear distance vs. signal strength data like wifi in an urban environment would be. http://courses.cit.cornell.edu/ee476/FinalProjects/s2007/ayl26_ym82/ayl26_ym82/index.htm has the background math and the what I assume is AVR C for doing it with magnetic field sensors.