Touristicness

The analysis assigned quantitative weightings of relative importance to touristicness to each of the seventeen factors. […] The final product of their findings is concerned with the identification of the elements of culture, the manner in which culture is visibly manifested and the relationships of these elements and manifestation with the overall touristicness of the destination area.

I would suggest that to be dubbed a "world city" would be based on size, commercial importance, regional and global economic impact (so Atlanta would definitely count), touristicness (which isn't a word), international transport links (effect rather than cause, admittedly, Atlanta again).

We collected Istat data on arrivals and presences of Italians and foreigners from 1990 to 2008, in order to obtain the touristic density index (= arrivals of tourists / area of the considered territory) and the touristic specialization index (= touristic presences / number of residents) for the new touristic development index by Forte and Mantovani, which is conceived to measure the «touristicness» degree of given territories in comparison with others as benchmark.