How to ask for datasets

May 6, 2015

There’s a lot of data readily available online. We know this. However, there’s also a lot of data available that’s offline, sitting on people’s hard drives. You just have to ask for it — in the right way. Christian Kreibich, a researcher for the International Computer Science Institute, provides a guide.

Make sure you’ve done your homework. This, too, is key. You need to demonstrate that you know your stuff and have good reasons for the inquiry. To give a negative example, I frequently receive requests for “botnet data”. That could mean anything. Are you interested in malware binaries, traffic captures, NetFlow data? Why, and why would you need mine? Understand the meaning and potential of the data you’re asking for, and be concrete. Understand the implications of obtaining certain datasets, such as privacy concerns, risks to others, or repeatability of the experiment.

Other tips include don’t be a jerk, make your affiliation clear, and make your purpose clear. But the first tip — don’t be shy — is the best. Just because the data isn’t online doesn’t mean the source doesn’t want to share, and it never hurts to ask.

This tweet from Kevin Quealy came to mind:

Favorites

Unemployment in America, Mapped Over Time

Watch the regional changes across the country from 1990 to 2016.

Real Chart Rules to Follow

There are rules—usually for specific chart types meant to be read in a specific way—that you shouldn’t break. When they are, everyone loses. This is that small handful.

Pizza Place Geography

Most of the major pizza chains are within a 5-mile …

How to Spot Visualization Lies

Many charts don’t tell the truth. This is a simple guide to spotting them.