Information center for communications-type navigation device

An information center, comprising:

• a communicator which performs transmission/reception of data, route information calculator for creating route information by calculating an optimum route from position information on a starting place and a destination place;
• and
• a guiding point information calculator which creates guiding point information by making reference to said calculated route so as to extract a guiding point at which an advancing course is to be modified,
• wherein said route information calculator makes a comparison between orbital-track information on a position of a requester and road map information so as to determine a road on which said requester is positioned and an advancing direction thereof, said orbital-track information being received by said communicator, and further, calculates said optimum route from said position information on said destination place obtained by said communicator, and thereby creates said route information.

An information center, comprising:

• a communicator which performs transmission/reception of data, map storing storage a map;
• and
• a map cutter which cuts out map data from position information and scale information,
• wherein said information center manages and stores an identification number of a user who makes a map data cutting-out request, said cut-out map area, and updated information on said map information.

An information center, comprising:

• a communicator which performs transmission/reception of data,
• a route information calculator which creates route information by calculating an optimum route from position information on a starting place and a destination place;
• and
• a guiding point information calculator which creates guiding point information by making reference to said calculated route so as to extract a guiding point at which an advancing course is to be modified,
• wherein said communicator judges that route guidance information has been requested, and adds said route guidance information to said guiding point information and said route information, and further creates route guidance data to which link information which makes reference to said route information from said guiding point information has been added, said communicator then transmitting said route guidance data to a request source.

An information center, comprising:

• a communicator which performs transmission/reception of data,
• a route information calculator which creates route information by calculating an optimum route from position information on a starting place and a destination place;
• and
• a guiding point information calculator which creates guiding point information by making reference to said calculated route so as to extract a guiding point at which an advancing course is to be modified,
• wherein it is judged that route guidance information has been requested, said optimum route being searched from said position information on said starting place and said destination place, said route information converted into schematic configuration data being transmitted to a request source, said route guidance information including said guiding point information and said route information being transmitted if further detailed route information is requested.

An information center, comprising:

• a communicator which performs transmission/reception of data,
• a route information calculator which creates route information by calculating an optimum route from position information on a starting place and a destination place;
• and
• a guiding point information calculator which creates guiding point information by making reference to said calculated route so as to extract a guiding point at which an advancing course is to be modified,
• wherein route history storing storage route information and guidance information requested in a past on each user basis, and said route information calculated from said starting place at which each user had started and said destination place extract route information that differs from said route information stored in said route history storage, said extracted route information and guiding point information corresponding thereto being then transmitted.