aaron

Analyzing the iPhone Location Log File

Today at Where 2.0, two data scientists announced a discovery that iPhones are recording GPS positions into a hidden file on the device. I’ll save a summary for an update of this post, but go read the original article for now. I downloaded the logs from Amber Case‘s iPhone, and have been looking through them to see what’s there. Turns out it’s a lot more than just the cell tower...

aaron

Mapping wifi access points in Portland

I’ve been logging GPS data for about a year and a half. I use an app on my Windows Mobile phone to log the GPS data, and my phone has a wifi antenna that stays in the “off” position most of the time. I met with @donpdonp the other day and he introduced me to the geomena.org project. I realized it should be possible to log access points along with my existing GPS logging. It was easy to...