“the catch is that the distribution of check-in densities in the real world varies greatly as a function of venue shape and size, which in turn are a function o

“the catch is that the distribution of check-in densities in the real world varies greatly as a function of venue shape and size, which in turn are a function of category or chain, and location. So, the check-ins at a suburban Target look very different from the check-ins at a bar in Manhattan. There is no single value of MinPts and Eps that would work globally.”