If you own a business, you probably want to know how many people walk into your stores. If you're a city, you may want to know how many people use a given sidewalk or drive down a certain street. You could measure all of this with some basic sensors or WiFi pinging, but that's either not very accurate or difficult to install. New York-based Placemeter, which is coming out of…
Read MoreSource: TechCrunch