> wifi AP database

You linked to the download page where there's only the Cell Networks database.

We're going to put some more information there on why we don't publish wifi at this point.

https://github.com/mozilla/ichnaea/issues/330

In a nutshell though, we don't know how to do this yet without creating a privacy nightmare.

Good question, I added a ticket to get this addressed: https://github.com/mozilla/ichnaea/issues/330

I wrote about some of the topics a while back. Not all of it is up-to-date but it gives the broader context: http://blog.hannosch.eu/2013/12/mozilla-location-service-wha...