Map information system for moving body

A map information display system for a moving body, comprising:

• coordinate information generating means for generating route point coordinate information representing points on a route being traveled by the moving body and on a scheduled route;
• limited region map information generating means for extracting map information for only a limited region based on the route point coordinate information from map information stored in a storage medium and including road information, and for generating limited region map information, said limited region map information generating means including:
• route generating means for generating a moving body route based on the route point coordinate information and the road information;
• extracting means for setting map information of a strip-shaped region extending along the moving body route as the limited region map information;
• and
• strip-shaped region adjusting means for adjusting a size of the strip-shaped region so as to include the moving body route when it is determined that the information amount of the limited region map information is larger than a specified storage capacity but less than a storage capacity of the storage means;
• storage means for storing the limited region map information;
• display means for displaying the stored limited region map information;
• and
• current position coordinate information detection means for detecting current position coordinate information of the moving body, wherein said extracting means adds the current position coordinate information to the limited region map information.

Limited region map information generating means for a map information display system for a moving body, said limited region map information generating means for extracting map information for only a limited region based on route point coordinate information from map information stored in a storage medium and including road information, and for generating limited region map information, said limited region map information generating means comprising:

• route generating means for generating a moving body route based on the route point coordinate information and the road information;
• extracting means for setting map information of a strip-shaped region extending along the moving body route as the limited region map information;
• and
• strip-shaped region adjusting means for adjusting a size of the strip-shaped region so as to include the moving body route when it is determined that the information amount of the limited region map information is larger than a specified storage capacity but less than a storage capacity of the storage means;
• wherein said extracting means includes shape selection means for selecting a shape of the search region.