Method and system for providing client privacy on the Internet when the client requests content from a public application server. Disposed from and into the ignition housing are at least two connecting leads that arc connected to conductors that also arc connected to contact lugs. Each of the second light-emitting rows is composed of a plurality of green and blue LEDs arranged linearly alternately. The map data generating section configured to generate distribution map data including at least one target map data unit of a map that has been divided into a plurality of map units, with the distribution map data including map data version information for a target map unit to be updated and at least one perimeter map unit existing along a perimeter of the target map unit to be updated.