"We think Foursquare is a shining demonstration of our principle that cities are always already smart, that this smartness inheres in the currents of daily practice, and that significant value is realized when these patterns are brought to light. And it’s already up, already running at scale, and costs a municipality precisely zero. Both the heroic, top-down systems being urged upon municipalities by the big vendors and the claims made on their behalf seem pretty impoverished next to it, don’t they?"

Working on location-based software is a kind of applied human geography.

Click on a point, get the street address.

Includes formulas for computing the distance between two pairs of coordinates.

Google Earth updates on its first birthday.