11. The system of claim 9 , wherein the parameter is a term purity parameter, the term purity parameter is a fraction of geographic locations within the candidate cluster that include the ngram.
11. The system of claim 9 , wherein the parameter is a term purity parameter, the term purity parameter is a fraction of geographic locations within the candidate cluster that include the ngram. 12. The system of claim 11 , wherein the computer renders two or more POI in accordance with a popularity hierarchy based at least in part upon the identified popularity ranking.