Terminal apparatus for downloading map

Abstract

A terminal apparatus has a simple map installed therein. When a map is desired, it is checked whether or not a map of a desired place exists in the simple map. If it exists, the map of the desired place is loaded from the simple map, or if it does not exist, the map of the desired place is downloaded from a navigation server.

What is claimed is:  
     
         1 . A terminal apparatus in which a simple map is installed and when a map is desired, it is checked whether or not a map of a desired place exists in the simple map, and if it exists, the map of the desired place is loaded from the simple map, or if it does not exist, the map of the desired place is downloaded from a navigation server.  
     
     
         2 . A terminal apparatus according to  claim 1 , wherein said simple map is a map composed of specific sorts of roads.  
     
     
         3 . A terminal apparatus according to  claim 2 , wherein said specific sorts of roads include expressways and national roads.  
     
     
         4 . A terminal apparatus according to  claim 1 , wherein said simple map is a rough map at lower level.  
     
     
         5 . A terminal apparatus according to  claim 1 , wherein said simple map is a display map that does not include any map for retrieval.  
     
     
         6 . A terminal apparatus in which a simple map is installed and when a map is desired, it is checked whether or not a map of a desired place exists in the simple map, and if it exists, the map of the desired place is loaded from the simple map and data for creating a guide map including a guidance point is downloaded from a navigation server, or if it does not exist, a small sectional map including a guidance point is downloaded from the navigation server.  
     
     
         7 . A terminal apparatus according to  claim 6 , wherein said guide map involves data for guiding a travelling direction at a position permitting travelling in plural directions.  
     
     
         8 . A terminal apparatus in which a simple map is installed and when a map is desired, it is checked whether or not a map of a current position is in the simple map, and if it exists, the current position map is loaded from the simple map, or if it does not exist, the current position map is downloaded from a navigation server.  
     
     
         9 . A terminal apparatus in which a simple map comprising specific sorts of roads is installed and when a map is desired, if a car passes through the specific sorts of roads, the simple map is loaded, or if the car passes through any other road than the specific sorts of roads, a map of a current position is downloaded from a navigation server.  
     
     
         10 . A terminal apparatus according to  claim 9 , wherein said specific sorts of roads comprises expressways and national roads.  
     
     
         11 . A terminal apparatus in which a simple map is installed and when a map is desired, it is checked whether or not a map of a desired place exists in the simple map, and if it exists, the map of the desired place is loaded from the simple map, or if it does not exist, a remaining storable capacity of medium storing the simple maps is notified to a navigation server, and a map edited in accordance with the remaining storable capacity is downloaded from the navigation server.  
     
     
         12 . A terminal apparatus in which a simple map is installed and when a map is desired, it is checked whether or not a map of a desired place exists in the simple map, and if it exists, the map of the desired place is loaded from the simple map, or if it does not exist, map data with flagged components is received from a navigation server.  
     
     
         13 . A terminal apparatus according to  claim 12 , wherein upon receiving said map data with flagged components, if there is a radio disturbance, the map data following the map data directly before a flag that could not be received is demanded to receive all the flagged components.