Unfortunately, the original version of this article [1] contained several errors. The numbers in Table 3 should have been divided by two and the title of the table should have been “Ranking of nodes based on the fraction of the total weight” instead of “Ranking of nodes based on the total weight”. Accordingly, the sentence “The Eiffel Tower alone accounted for a 50% of the total weighted degree” in Section 3.3 “Network of touristic sites” should have read “The Eiffel Tower alone accounted for a 25% of the total weighted degree”.

Table 3 Ranking of nodes based on the fraction of the total weight

The correct Table 3 is included in full in this erratum.