It’s illegal to check a map on your phone while driving in California

California Court Rules It Illegal To Check Maps On Your Phone While Driving | Techdirt:

Anyway, all of that is preamble to a new court ruling in California, found by Orin Kerr, saying that using a mobile phone to check a mapping/GPS program violates the state’s law against distracted driving. The driver had argued that the laws are about talking on a phone and/or texting/surfing the internet, but that clearly using a mapping program should be allowed. The court disagreed, even as it acknowledged some of the oddities of what that meant, and said it’s really the job of the state lawmakers to figure out what they want to do.

I’ll be honest: there’s no way I’d be able to get around Los Angeles without using the GPS function on my phone.

What Apple’s latest purchase actually does

WiFiSLAM uses a combination of various methods to get better indoor locations. Obviously, WiFi and cell tower trilateration doesn’t work indoors. Instead, WiFi signals can be measured by any device to get an approximate location. In order for that location to be accurate, though, you have to use WiFi fingerprinting to get an idea of what the materials and construction of a particular building are going to do to WiFi signals. Enough scans in one place and you’ll have an accurate profile of a building that can be used to make a map.

The Next Web’s article goes into greater detail on how the company uses all the sensors in a phone together to not only create detailed maps but also track the routes people take through the building. Amazing stuff.