1. A system comprising: a tag relevance manager embodied via executable instructions stored on a computer-readable storage medium, the tag relevance manager including: a tag collector that obtains a plurality of tags associated with a plurality of geographic locations, each tag indicating one or more attributes associated with an entity associated with one of the geographic locations; a geographic scope component that obtains a first geographic scope indicating a first hierarchical geographic analysis level associated with the plurality of geographic locations; a first frequency component that obtains a first relative frequency of occurrence of a first one of the tags based on a first bounded geographic area that includes a first one of the geographic locations that is associated with the first one of the tags; a second frequency component that obtains a second relative frequency of occurrence of the first one of the tags based on a second bounded geographic area that is larger than the first bounded geographic area, the second bounded geographic area surrounding the first one of the geographic locations that is associated with the first one of the tags, the first bounded geographic area including at least a first portion of the plurality of geographic locations, and the second bounded geographic area including at least a second portion of the plurality of geographic locations; and a tag ranking component that determines, via a device processor, a first locale ranking value associated with the first tag indicating a relevance of the first tag based on the first geographic scope, the first and second relative frequencies of occurrence, and a locale associated with the first bounded geographic area.
12. The system of claim 1 , further comprising: a comparable ranking component that determines a globally comparable ranking value in accordance with S X A ′ = S X A · N A N _ wherein X represents the first one of the tags, A represents the first bounded geographic area, S X A represents the first locale ranking value, N A represents a total number of tags in A, N represents an average number of tags per quadkey tile at the first geographic scope, N A N _ represents a density factor, and S′ X A represents the globally comparable ranking value.