San Francisco is taking steps to combat an outdoor “problem” in the city:

The latest "pee wall" created by the city to make urine splash back on those who pee against the wall! pic.twitter.com/2MIRlfv9aM — carolyn tyler (@ctylerabc7) October 7, 2015

How do you know where to tread lightly if you visit one of the country’s most progressive cities? That’s where Vox comes in handy:

A comprehensive map of human poop on San Francisco sidewalks http://t.co/I9ne8LO30u pic.twitter.com/nGxUlC6CgM — Vox (@voxdotcom) October 7, 2015

Maybe there’s a special frequency on the police scanner where they get that info:

Welp, Yglesias has finally been promoted to the level of his incompetence: Poop Beat. https://t.co/ds0NRWlaJF — Cuffy (@CuffyMeh) October 7, 2015

Ezra Klein: The Constitution is like over 100 years old! Zack Beauchamp: Gaza Bridge! Matt Yglesias: POOP MAP.#VoxMasthead — Cuffy (@CuffyMeh) October 7, 2015

Can't imagine why Bezos didn't give $10 million for this. https://t.co/8EYRnzmogU — EEEe (@EEElverhoy) October 7, 2015

i doubt this is comprehensivehttps://t.co/sQTXzl7kul — Tuan Nguyen (@_tnguyen87) October 7, 2015

.@CuffyMeh be sure to check out @voxdotcom tomorrow, when @Max_Fisher maps the poop on the Gaza-West Bank bridge. — Sean M. (@morelikeregular) October 7, 2015

Ha! We can’t wait.