After learning the official records were incomplete, a citizen mapper started building a gorgeous guide to the megacity's street art.
An uneven geography of disappearing wealth.
Find out with this handy new map.
The city finally has an easy-to-read bicycling map, thanks to the vision of a die-hard local cyclist.
Where it's "safe" to live if you're more worried about cops than criminals.
But that may change next year.
Watch the commuting patterns of New York, San Francisco and Los Angeles.
Meet the data treasure trove known as "NOAA View."
Yet it's being hailed as a victory for transit-oriented development.
In some places, the city's real estate prices are soaring, but it's not true everywhere.
There are deep divisions in one of the world's most powerful global cities.
This is what a 3D map looks like when compressed into 2D form, as only computers can read it.
A spooky look at the geography of more than 200 top-rated scary movies.
By age, size, income and race.
In 2012, just 10 counties - out of 3,000 - were responsible for 30 percent of contributions made by individuals to national candidates.
A map of America's unequal economic mobility.
A map from the Oxford Internet Institute reveals the geographical distribution of billions of photos uploaded to the popular image-sharing site.
Los Angeles rolls out interactive neighborhood health profiles covering everything from crime stats to obesity rates.
A new study reminds us that poverty is the giant backpack dragging down American students.