20. The system of claim 17 , wherein weighting the nodes based on a predetermined criteria associated with each node includes weighting the nodes according to a distance of a node from a center of a viewing area used for displaying the customized advertisements.
17. The system of claim 16 , wherein determining one or more characteristics associated with the identified nodes includes: weighting the identified nodes based on a predetermined criteria associated with each node; identifying a node with a highest weight; and determining one or more characteristics associated with the identified node with the highest weight.