If crime in San Francisco was shown as peaks and valleys


...it would look like this.

And what a revealing landscape the city suddenly becomes.

If you scroll down through the many crime visualization images that are posted at doug mccune's blog, you'll find a visual for prostitution, along with the following comments:

"My favorite map is the one for prostitution (maybe “favorite” is the wrong choice of words there). Nearly all the arrests for prostitution in San Francisco occur along what I’m calling the “Mission Mountain Ridge”, which runs up Mission St between 24th and 16th. I love the way the mountain range casts a shadow over much of the city. There’s also a second peak in the Tenderloin (which I’m dubbing Mt. Loin)."