Method and apparatus for transmitting position information on a digital map

A position information transmission apparatus for transmitting road shape information to specify a target road section on a digital map, the apparatus comprising:

• means for selecting nodes in a target road section on a first digital map on a predetermined condition;
• means for generating road shape information including the selected nodes;
• and
• means for transmitting the road shape information to a receiving side,
• wherein the receiving side identifies positions of the selected nodes on a second digital map by matching the selected nodes on the second digital map based on the road shape information and identifies the target road section on the second digital map by performing a route search between the identified positions of the nodes on the second digital map.

A method for identifying position of a target road section on a digital map, said method comprising the steps of:

• at a transmitting side having a first digital map,
• selecting nodes including coordinate information from the target road section on the first digital map on a predetermined condition;
• creating position information of the target road section on a first digital map using the selected nodes;
• sending said position information of the target road section;
• at a receiving side having a second digital map,
• receiving said position information of the target road section;
• calculating a path between positions of said selected nodes on the second digital map based on said coordinate information;
• and
• identifying position of said target road section on the second digital map based on the calculated path.

A method for identifying position of a target road section on a digital map, said method comprising the steps of:

• at a transmitting side having a first digital map,
• creating position information of the target road section, wherein said position information includes coordinate information of nodes selected from the target road section and at least a part of said nodes represent a shape of a predetermined section of the target road section;
• sending said position information of the target road section;
• at a receiving side having a second digital map,
• identifying position of said predetermined section on the second digital map by using said shape;
• calculating a path of the other section on the second digital map;
• and
• identifying position of the target road section on the second digital map based on the identified position of said predetermined section and the calculated path.

An apparatus for providing position information indicating a target road section on a first digital map to a receiving side having a second digital map so that the receiving side can identify the target road section on the second digital map, said apparatus comprising:

• at a transmitting side having a first digital map,
• means for creating position information of the target road section, wherein said position information includes coordinate information of nodes selected from the target road section and at least a part of said nodes represent a shape of a predetermined section of the target road section;
• at a receiving side having a second digital map,
• means for identifying position of said predetermined section on the second digital map by using said shape;
• means for calculating a path of the other section on the second digital map;
• and
• means for identifying position of the target road section on the second digital map based on the identified position of said predetermined section and the calculated path.

An apparatus for identifying position of a target road section on a digital map at a receiving side based on position information including supplementary information on a digital map at a transmitting side, said apparatus comprising:

• means for receiving the position information;
• means for determining position of nodes representing the target road section on the digital map at the receiving side based on the received position information;
• means for calculating a path between the identified nodes;
• and
• means for identifying the target road section on the digital map at the receiving side using the path,
• wherein at least one of the calculating step and the identifying step is performed using the supplementary information.

A method for identifying a first road section on a first digital map, and identifying a second road section, corresponding to the first road section, on a second digital map, the method comprising the steps of:

• selecting the first road section on the first digital map;
• selecting first plural points located on the first road section, on the first digital map;
• creating location information indicative of coordinates of the first plural points on the first digital map;
• identifying plural second points, corresponding to the first plural points, on the second map with reference to the location information;
• calculating a path connecting the second plural points on the second map;
• and
• identifying the second road section on the second map based on the path.

A method for identifying a first road section on a first digital map, and identifying a second road section, corresponding to the first road section, on a second map, the method comprising the steps of:

• selecting the first road section on the first digital map;
• extracting a part of the first road section as a predetermined section on the first digital map;
• selecting first plural points located on the first predetermined section on the first digital map;
• creating location information indicative of coordinates of the first plural points on the first digital map;
• creating positional information indicative of a relative positional relationship between the first road section and the first predetermined section on the first digital map;
• identifying plural second points, corresponding to the first plural points, on the second map with reference to the location information;
• identifying a second predetermined section, corresponding to the first predetermined section, on the second digital map based on the plural second points;
• and
• identifying the second road section on the second map based on the second predetermined section and the positional information.

A receiving apparatus for identifying a position of a target road section on a digital map, said receiving apparatus comprising:

• receiving means for receiving position information from transmitting side in which at least a part of nodes selected from the target road section represent a shape of a predetermined section of the target road section;
• identifying means for identifying the predetermined section on the digital map using the received position information;
• and
• calculating means for calculating a path of the other section on the digital map,
• wherein the identifying means identifies the position of the target road section on the digital map based on the predetermined section and the calculated path.