These impressed us for both what they illustrated and how they did it.
But merely providing the service isn't enough. It needs to work well, too.
At the very least, it gives parents god-like knowledge of their teen's driving habits.
We seldom treat identity theft the way we do other crimes.
Even in an era of cheap, digital communication, most of us are still talking to our neighbors.
Where there once was no land, now there is.
In a new survey, 70 percent said they would share personal information online if it lowered their healthcare costs.
"Earth" relies on supercomputers to paint an almost real-time picture of the atmosphere's feverish churning.
Playdope connects people whose paths through the city overlap.
And the city's airport falls from the top spot to the ninth.
A San Francisco CEO says that in a perfect city, the homeless wouldn't be so visible. He's only mostly wrong.
A community beset by crime, and the intrusive tools they're using in hopes of stopping it.
Scientists have trained algorithms to determine your "urban tribe" from your online photos.
NASA captures a 750-mile trail of haze on camera.
These maps show how shipping vessels are creating loud neighborhoods for oceans and the animals that live there.
A cautionary note about constant digital photography.
Google opens up its mapping functionality to allow for DIY imagery.
And a red-light district.
A project mapping every pool in Los Angeles raises awkward questions about the tradeoff between privacy and big, public data.