Patent ID: 8725399

Claim:
Apparatus comprising: an input section of a server system for receiving positional information about an item, wherein the item is one of a building, a landmark, or a historically or culturally significant site; a database of the server system storing a plurality of chronological maps, wherein each of the plurality of chronological maps is associated with a time such that the plurality of chronological maps is collectively associated with a time period spanning a plurality of years; a search section of the server system (1) estimating an age of the item by identifying a change, at a position defined by the received positional information, occurring in two chronologically adjacent chronological maps of the plurality of chronological maps, and (2) finding, by using another change in two chronological maps of the plurality of chronological maps, a further item having an estimated age within a predetermined number of years of the estimated age of the item, wherein the further item is one of a building, a landmark, or a historically or culturally significant site; a section of the server system generating a map including and marking the further item; and a communication section of the server system transmitting the generated map for display.