Problems with Geocoding

Here's an interesting problem with mapping crime statistics:

CNet reports that a new online crime mapping tool in Los Angeles shows a huge crime wave right next to the new police headquarters building. The problem turns out to be the default for addresses of crimes.

We had the same problem in Jacksonville when looking at prostitution statistics -- the most "popular" street corner for the trade appeared to be within police headquarters. Again, it was a data coding error -- blank address fields defaulted to police headquarters.

Our experience (and now this story from LA) is a reminder that our data systems are only as good as our inputs, and as we start using data in new and creative ways, we are bound to uncover all kinds of errors that will need to be addressed properly. (Pun only kind of intended.)

Have you seen similar issues in your community?

(Hat tip: Slashdot)