Patent ID: 7353109

Claim:
A display method for a navigation system for searching and displaying objects clustered within a search area, comprising the following steps of: defining a size and shape of a search template for searching objects in the search area; scanning the search template on the search area by displacing its position by a predetermined increment; counting and recording a number of objects on the search area within the search template at every increment of said displacement position, thereby creating an object distribution matrix; applying a cluster search algorithm to the object distribution matrix, thereby detecting distribution of clusters of the objects in the search area; and displaying the clusters of the objects in the search area by a predetermined display method; wherein said cluster search algorithm includes the following step of: finding numbers on the object distribution matrix that are larger than any neighboring numbers and recording the higher numbers; temporarily masking the higher numbers on the object distribution matrix and erasing the neighboring numbers from the object distribution matrix; repeating the above operations until any remaining numbers on the object distribution matrix become equal to or smaller than a predetermined value; and erasing all the remaining numbers and recovering the masked numbers on the object distribution matrix, thereby obtaining distribution of the clusters of the object in the search area.