On 09.09.2013, at 18:41 , Eric Rescorla <e...@rtfm.com> wrote: > 1. How do I bootstrap? I turn on my device and want to get the coordinates of > the aps I see. That requires a lat long for neighbors. What now?
We build the database by having people use a stumbler application to sent us observations. The stumbler app uses the mobile phones GPS sensor to know its location. It reports all cell towers and wifi APs it sees to us in a certain location. We crunch some data, then we make a search API available over this data. Later someone else asks us what their location is, based on seeing cell towers or APs. > 2. As asked previously will the db be published or query able? It will definitely be queryable, but with a lot of restrictions to enhance privacy. We would like to publish it or as much of it as possible, but it's unclear how to do that, when a lot of the individual records are considered personally identifiable information. > 3. What is the lat/long resolution? How is it measured? The resolution differs, but is generally "as precise as it gets". So GPS sensors often have 5 meter precision, Google aims to do 1 meter resolution for indoor locations based on Wifi access points. Internally we currently store things with centimeter precision and timestamps in milliseconds - so definitely all on the far side of "extremely detailed / private". Hanno _______________________________________________ dev-security mailing list dev-security@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-security
