Note the big deposits near the Bi-Rite Creamery, perhaps the most famous ice cream eatery in the city. People line up around the block to order every flavor, except, oddly enough, for chocolate.

If you spend big bucks and book a stay at the Hilton in Union Square, you can be within easy walking distance of the Golden Gate Theater and other downtown attractions in the increasingly trendy but still lethal Tenderloin district. Well worth up to $260 a night!

Web developer Jennifer Wong (a.k.a. mochimachine) created the Human Wasteland map out of that public data. The project, which won Zillow's SF office Fall 2014 Hack Week contest, offers monthly maps from January to June 2013 — but that's enough to give you a sense of where the problem is.

"It's easy for people to place blame on the homeless themselves," Wong tells Mashable. "But they need to take a look at the bigger picture and see that they have nowhere to go, to sleep, use the toilet, to shower ... the obvious solution is to provide more public facilities throughout the city.

Or... the obvious solution is to deal with the homeless problem that San Francisco is so lax in coping with. Homelessness drives away tourists, hurts local businesses, and makes it unpleasant and even unsafe to live in areas where people are living on sidewalks. Just because a sidewalk is a "public" space doesn't mean the public has unlimited rights to it. Well-ordered suburbs don't have homeless problems because they enforce vagrancy laws. You won't find a human waste map for Naples, Fl, Fairfax, VA, Ridgewood, NJ, or Newport Beach, CA, just to name a few, because they wouldn't allow such a problem to fester. To see my solution to the homeless problem in greater detail, have a look here.