How to make a map of wi-fi points (using PDA, rapsberry, etc.)?

Question

Do it yourself

Goodnight!
We have a "person" who likes to walk. He walks a lot, sometimes even a day or so.
Interested in the question:
How can I make a map of wi-fi points in those places where this "person" happens? To show the name of the network, open-closed, type of encryption. A "man" can take public transport and move quickly - is it possible to capture the points that he will pass by?

Answer 1

WiGLE , client for android.
Available off-line search for "own" points.
Quite, but because it takes time to run through the channels - the number of networks found naturally decreases. However, passing several times along the route will add networks and increase positioning accuracy.

Answer 2

openwifi.su
Only you stop collecting so much information - this is some kind of espionage, Mozilla, therefore, do not share Wi-Fi points, unlike us