6. The method of claim 1 , wherein the calculating the spatial distribution comprises: estimating a geographical correlation of categories of the query region and a respective geographic region candidate in the set of geographical region candidates; and evaluating a similarity between the query region and the respective geographic region candidate in the set of geographical region candidates using a vector associated with different categories of the points of interests.
6. The method of claim 1 , wherein the calculating the spatial distribution comprises: estimating a geographical correlation of categories of the query region and a respective geographic region candidate in the set of geographical region candidates; and evaluating a similarity between the query region and the respective geographic region candidate in the set of geographical region candidates using a vector associated with different categories of the points of interests. 7. The method of claim 6 , wherein the calculating the spatial distribution further comprises determining a mutual distance, wherein the mutual distance is a distance between at least two geographical region candidates.