Method and apparatus for transmitting position information on a digital map
First Claim
1. A position information transmission method for transmitting and receiving road shape information, the method comprising the steps of:
- at a transmitting side having a first digital map,selecting nodes in a target road section on the first digital map on a predetermined condition;
generating road shape information including the selected nodes;
transmitting the road shape information;
at a receiving side having a second digital map,identifying positions of the selected nodes on the second digital map by matching the selected nodes on the second digital map based on the road shape information; and
identifying 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.
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Accused Products
Abstract
The invention purposes to provide a position information transmission method for accurately transmitting a position and a shape on a digital map with a small amount of data.
In a position information transmission method of the invention, the transmitting side transmits road shape information to specify the target road section on a digital map and event information to specify an event position by using a relative position in the target road section and the receiving side performs map matching based on the road shape information to identify the target road section and identifies the event position in the target road section based on the event information is characterized in that the transmitting side intermittently selects nodes included in the target road section to include the coordinate data of the nodes in the road shape information for transmission, and that the receiving side performs map matching to determine the positions of the nodes included in the road shape information and obtains the road connecting the nodes by way of a route search to identify the target road section. It is thus possible to efficiently and accurately transmit an event position on a digital map.
80 Citations
41 Claims
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1. A position information transmission method for transmitting and receiving road shape information, the method comprising the steps of:
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at a transmitting side having a first digital map, selecting nodes in a target road section on the first digital map on a predetermined condition; generating road shape information including the selected nodes; transmitting the road shape information; at a receiving side having a second digital map, identifying positions of the selected nodes on the second digital map by matching the selected nodes on the second digital map based on the road shape information; and identifying 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A position information transmission apparatus for transmitting road shape information to specify a target road section on a digital map, the apparatus comprising:
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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.
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13. A position information receiving apparatus for receiving road shape information designating a target road section on a digital map and for specifying the target road section based on the road shape information, the apparatus comprising:
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map matching means for performing map matching to identify positions of selected nodes included in the road shape information on the digital map; and route search means for performing a route search between identified positions of the nodes on the digital map to identify the target road section. - View Dependent Claims (14)
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15. A method for identifying position of a target road section on a digital map, said method comprising the steps of:
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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. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A method for identifying position of a target road section on a digital map, said method comprising the steps of:
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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. - View Dependent Claims (27, 28, 29)
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30. 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:
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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. - View Dependent Claims (31)
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32. 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:
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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. - View Dependent Claims (33)
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34. 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:
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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. - View Dependent Claims (36, 37)
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35. 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:
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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.
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38. A receiving apparatus for identifying a position of a target road section on a digital map, said receiving apparatus comprising:
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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. - View Dependent Claims (39, 40, 41)
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Specification