It may seem a bit contradictory at first, but Signal vs. Noise (37signals) points out an excellent case study of an instance where the essence is more important than the truth itself: mapping the New York City subway system (nothing says complexity like the largest number of subway stations in the world — 468).
Current official maps are geographically accurate, but the maze of different lines makes understanding the map and figuring out how best to navigate through the system becomes a struggle.
Enter Kick Design. Eddie Jabbour, Creative Director at Kick, apparently grew frustrated at the deficiencies of the standard maps of the New York subway system. At least five years of research (finding maps on eBay, among other things) and design work led to Jabbour’s new map, a widely-praised work that eschews the geographic reality of NYC for a cleaner, easier to read representation:

As you can see, the map uses simplified notations, straightens the lines nearly into a grid and simplifies the color usage into more restricted, abstract spaces. Text is now cleaned up, non-diagonal, and less overlapping, and the legend and symbols have been dramatically clarified and improved. (It’s not as dramatic as Massimo Vignelli’s 1972 abstraction, and that may be a good thing.)
As 37signals and the New York Times point out, the map bears a similarity to London’s classic logic-oriented map of the tube system. The Signal vs. Noise blog calls it “helpful distortion,” eloquently and elegantly asserting that “sometimes knowledge is more important than truth.”
Indeed, often, the best way to explain a concept, tell a story, or even interface with a complex device is through trustworthy simplification. Though there are numerous examples, an easy one can be seen in the qualities of a successful interface to a computer or other consumer electronics device.
Often, criticisms of the iPod revolve around the fact that it doesn’t offer this feature or that feature (it doesn’t have built-in radio, it doesn’t have wi-fi — it doesn’t even have an off switch). But, that type of argument misses a critical point and significant appeal of the iPod — it does what it does simply, cleanly and efficiently. That simplicity gives it elegance and attractiveness that has certainly helped it to become the best-selling music player in history (and one of the best selling electronic devices in history).
The subway maps are a great object lesson in this appealing accessibility, and rather than continue to rehash the excellent coverage from 37signals, I’ll simply direct you over there with my hearty agreement, and two last thoughts:
Imagination is more important than knowledge. For knowledge is limited to all we now know and understand, while imagination embraces the entire world, and all there ever will be to know and understand.”
—Albert Einstein
…and, consider this: Eddie Jabbour finally met with the MTA about his map and the possibilities for improving the official map, and they rejected it. What do you think about that?
I’d love to read your thoughts and any other examples of “helpful distortion” in the comments!
(Thanks, Daring Fireball)