17. The video surveillance method of claim 16 , further comprising receiving a search request including one or more natural language terms relating to the first event, and returning the information to be overlaid on the map of the geographical area, based on the search request.
17. The video surveillance method of claim 16 , further comprising receiving a search request including one or more natural language terms relating to the first event, and returning the information to be overlaid on the map of the geographical area, based on the search request. 19. The video surveillance method of claim 17 , further comprising, receiving the search request from a display device, and based on the search request, causing the display device to display the information for the first event overlaid on the map of the geographical area.