WO2005114618A1 - デジタル地図の位置情報伝達方法、位置情報送信装置および位置情報受信装置 - Google Patents
デジタル地図の位置情報伝達方法、位置情報送信装置および位置情報受信装置 Download PDFInfo
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- WO2005114618A1 WO2005114618A1 PCT/JP2005/008919 JP2005008919W WO2005114618A1 WO 2005114618 A1 WO2005114618 A1 WO 2005114618A1 JP 2005008919 W JP2005008919 W JP 2005008919W WO 2005114618 A1 WO2005114618 A1 WO 2005114618A1
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- position information
- node
- start point
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
- G01C21/38—Electronic maps specially adapted for navigation; Updating thereof
- G01C21/3885—Transmission of map data to client devices; Reception of map data by client devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
- G01C21/38—Electronic maps specially adapted for navigation; Updating thereof
- G01C21/3863—Structures of map data
- G01C21/3867—Geometry of map features, e.g. shape points, polygons or for simplified maps
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B29/00—Maps; Plans; Charts; Diagrams, e.g. route diagram
- G09B29/10—Map spot or coordinate position indicators; Map reading aids
- G09B29/106—Map spot or coordinate position indicators; Map reading aids using electronic means
Definitions
- the present invention efficiently specifies a position by using absolute position information that can be specified by both the transmitting side and the receiving side, and enables efficient use of a transmission network.
- the present invention relates to a digital map and a method for transmitting position information of a digital map for transmitting position information of a traveling vehicle, a position information transmitting device, and a position information receiving device.
- the transmitting side expresses a vector shape 10 on a digital map by a node sequence 20 composed of a plurality of nodes Nl to Nn, and the node sequence
- the position information of a plurality of consecutive nodes N1 to Nn included in 20 is expressed by the absolute latitude and longitude of the position information of the start point node N1, and the position information of the other nodes N2 to Nn is the distance from the previous node.
- It transmits shape vector data represented by L j and relative orientation (declination) 0 j which is a difference in orientation.
- the shape vector data is received, the absolute latitude and longitude of each of the nodes Nl to Nn constituting the node string 20 are restored, and the vector shape is specified and displayed on the digital map (for example, , Patent Document 1).
- Patent Document 1 Japanese Patent Application Laid-Open No. 2002-328027 (Page 6, Fig. 1)
- the position information of the start node of the shape vector data is expressed in absolute latitude and longitude, it is expressed as a mutation difference between adjacent nodes. There is a problem that the amount of data increases compared to other nodes.
- An object of the present invention is to provide a digital map position information transmission method and position information transmission method capable of reducing the amount of data even when vector shape on a digital map is represented by position information of a plurality of nodes and transmitted. It is providing a device and a position information receiver.
- the position information transmission method of the digital map according to the present invention is characterized in that the vector shape on the digital map is represented by a node sequence consisting of a plurality of nodes, and the position information of the plurality of nodes is respectively transmitted from the adjacent previous nodes.
- a method of transmitting position information of a digital map for transmitting shape vector data represented by relative position information comprising: calculating an absolute position of each starting point node of a plurality of shape vector data; Selecting a reference point of a column and representing position information of the selected reference point by absolute position information; representing the position information of each of the start point nodes by relative position information with respect to the absolute position information of the reference point; Transmitting the position information of the reference point, each of the start point nodes, and the shape vector data group to the communication partner.
- the vector shape on the digital map is represented by a node sequence consisting of a plurality of nodes, and the position information of the digital map transmitting the position information of the plurality of nodes.
- a transmitting device wherein position information of the start point node of the vector shape is represented by relative position information with respect to predetermined absolute position information, and position information of nodes other than the start point node are respectively adjacent to adjacent nodes.
- a transmission unit that transmits position information of the plurality of nodes from the position information conversion unit.
- the vector shape on the digital map is represented by a node sequence consisting of a plurality of nodes, and the position information of the starting point node of the vector shape is a predetermined absolute position.
- the position information recovery unit of the node has a position information restoring unit that restores from the relative position information of each node based on the restored absolute position information of the previous adjacent node. Effect of the invention
- the amount of data when transmitting the position information of the start node is reduced, and the shape vector at the time of data transmission is reduced.
- the amount of data can be reduced.
- shape vector data can be efficiently transmitted from the transmitting side to the receiving side, and the communication bandwidth of the data transmission network can be effectively used.
- FIG. 4 A flowchart showing the receiving operation of the position information receiving apparatus according to Embodiment 1 of the present invention.
- the start point node processing unit according to Embodiment 2 of the present invention represents the start point node of each vector shape relative to each other. Diagram showing how to convert to
- FIG. 6 A diagram schematically showing a method in which a start point node processing unit according to Embodiment 3 of the present invention converts start point nodes of each vector shape into relative position representation.
- FIG. 7 A diagram schematically showing how a start point node processing unit according to Embodiment 4 of the present invention converts start point nodes of each vector shape into relative position representation.
- FIG. 8 A block diagram showing a configuration of a position information transmitting / receiving apparatus according to Embodiment 5 of the present invention
- FIG. 9 An outline of a probe car system for executing a position information transmitting method according to Embodiment 6 of the present invention Figure shown
- FIG. 10 A flowchart showing an operation in a probe car system that executes a position information transmission method according to a sixth embodiment of the present invention.
- FIG. 11 An explanatory view showing position information in a conventional digital map position information transmitting method.
- FIG. 1 is a block diagram showing configurations of position information transmitting apparatus 100 and position information receiving apparatus 200 for implementing the position information transmitting method according to the first embodiment of the present invention.
- position information transmitting apparatus 100 has a digital map display unit 110 for displaying position information superimposed on a digital map, a digital map database 120 for storing the digital map, and a position on the digital map. It has a position information conversion unit 130 for converting information into a node sequence of shape vector data, and a position information transmission unit 140 for transmitting position information represented by a node sequence of shape vectors.
- the position information conversion unit 130 is a shape data generation unit 131 that generates a node sequence of position information force shape vector data on a digital map, and a start point that processes position information of start point nodes of a plurality of shape vector data. And a node processing unit 132.
- the position information receiving apparatus 200 has a digital map display unit 210 for displaying position information superimposed on a digital map, a digital map database 220 for storing the digital map, and the received position information. And a position information receiving unit 240 for receiving position information represented by a series of nodes of a shape table.
- the position information restoration unit 230 sequentially restores position information of a plurality of start point nodes.
- such a position information transmitting apparatus 100 corresponds to a center device of a traffic information providing service center that transmits position information and traffic information related to the position information.
- such a position information receiving apparatus 200 corresponds to a navigation in-vehicle device, a portable terminal or the like which receives position information and traffic information related thereto from the center apparatus of the traffic information providing service center.
- FIG. 2 is a flowchart showing the transmission operation of position information transmitting apparatus 100.
- the position information transmitting apparatus 100 First, the operator etc. Referring to the digital map read out from 120 and displayed on the digital map display unit 110, if the target road Z section having a vector shape to be transmitted as position information or an event position such as an accident is selected, the selected target road is selected.
- the Z section is output to the position information conversion unit 130 (S1010). In the following description, it is assumed that there are a plurality of selected target road Z sections.
- the start point node processing unit 132 determines the positional relationship between start point nodes.
- One new reference point is selected based on (S1030), and the start point node is converted from an absolute position expression to a relative position expression from the reference point (S1040).
- the new reference point may be a reference point fixedly set in advance on the position information transmitting apparatus 100 side and the position information receiving apparatus 200 side. It may be a reference point transmitted from the transmitting apparatus 100 side to the position information receiving apparatus 200. Furthermore, there may be several possible reference points whose absolute positions are predetermined on the transmitting side and the receiving side, and a designated code for designating a new reference point may be transmitted each time the reference point changes.
- the number of bits required to represent the latitude and longitude of the range of the secondary mesh is, for example, 5 minutes for the latitude and 7 minutes and 30 seconds for the longitude. Then, according to (Equation 3) and (Equation 4) respectively, the latitude is 13 bits and the longitude is 14 bits.
- FIG. 3 is a diagram showing an example of a format of position information data transmitted from position information transmitting apparatus 100 to position information receiving apparatus 200. As shown in FIG. 3
- the number of shape data (2 bytes) which is the number of shape vectors, the absolute latitude of the reference point (3 bytes), Absolute longitude of reference point (3 bytes), relative latitude of start point node 1 (13 bits), relative longitude of start point node 1 (14 bits) ⁇ ⁇ ⁇ Relative latitude of start point node N (13 bits), start point node Relative position information of N (14 bits), relative position information of remaining nodes of shape vector data 1 starting point node 1 as starting point node ⁇ ⁇ ⁇ ⁇ Remaining shape vector data N starting point node N starting point node It transmits by the data format called relative position information of a node.
- each starting point node is not Only the reference points of nodes 1 to N are represented by absolute latitude and longitude, and all of the start point nodes 1 to N are represented by relative latitude and longitude. Therefore, all start point nodes 1 to N of each shape vector data are represented by absolute latitude and longitude It is understood that the amount of data can be reduced compared to the case of representing.
- the position information transmitting unit 140 needs to transmit the reference point to the position information receiving apparatus 200. There is no That is, in the data format shown in FIG. 3, the absolute latitude and longitude of the reference point can be omitted. Therefore, when the position information transmitting unit 140 needs to transmit the absolute position information of the reference point, at least when transmitting the reference point from the position information transmitting apparatus 100 to the position information receiving apparatus 200, This is when the position information of the reference point has changed.
- the position information receiving apparatus 200 does not transmit the absolute position information of the reference point in the position information receiving apparatus 200
- the position information receiving apparatus 200 in the case where the position information receiving apparatus 200 is fixed in advance, The position information transmitting apparatus 100 may also be transmitted, and the absolute position information used may be used as it is. In this way, it is unnecessary to transmit the reference point from the position information transmitting apparatus 100 to the position information receiving apparatus 200 or the number of times can be reduced, so that the amount of data can also be reduced.
- FIG. 4 is a flowchart showing the reception operation of the position information receiving apparatus 200.
- the position information receiving unit 240 receives the position information of the reference point, the start node group, and the shape vector data group transmitted from the other position information transmitting apparatus 100 (S2010). ). If the position information of the reference point is not transmitted from the position information transmitting apparatus 100, it is not received.
- the start point node restoration unit 231 restores absolute position information of all start point nodes represented by relative position information from the reference point based on the reference point represented by absolute latitude and longitude (S 2020) .
- the start point node restoration unit 231 uses the absolute position information of the reference point which has been preset on the transmitting side and the receiving side, or the absolute position information of the reference point which has been used so far. To do.
- the node position restoring unit 232 sequentially restores the position information of the node sequence of the corresponding shape vector data (S2030).
- the digital map display unit 210 reads out the digital map from the digital map database 220 and performs map matching based on the position information of the restored node row, and identifies the road Z section on the digital map S2040)
- the target road Z section having a vector shape designated by the transmitting side is superimposed and displayed on the digital map (S2050).
- the position information of the start point nodes Nl to Nn of each shape vector data is expressed by the relative position information of the reference point force and transmitted.
- the number of bits can be reduced and the amount of data to be transmitted can be reduced compared to the case where the positional information of the nodes Nl to Nn is expressed by absolute latitude and longitude.
- the reference point for representing the position information of start point nodes N1 to Nn of each shape vector data as relative position information is simply set in advance on both the transmitting side and the receiving side.
- the position and the absolute position transmitted from the transmitting side to the receiving side are used, in Embodiment 2, a more specific method of determining the reference point will be described.
- the processing in the start point node processing unit 132 of the second embodiment is the same as that of the first embodiment because only the processing in the start point node processing unit 132 is performed using the configuration of the first embodiment shown in FIG. I will explain to the center.
- FIG. 5 is a diagram schematically showing a method in which the start point node processing unit 132 of Embodiment 2 converts start point nodes of each vector shape into relative position representation.
- the shape vector data is represented by a series of nodes with the start point node as an end point, and each node is represented by the difference in distance from the previous node and the relative orientation displacement.
- nodes other than the start node are omitted, and are expressed only by the start node and the shape.
- start point node processing unit 132 first receives the absolute latitude and longitude of the center of gravity from the absolute latitude and longitude of the start point nodes Nl to Nn to be transmitted, as shown in the following (Expression 5). Calculate (LAT, LON),
- This point is set as the reference point of the start node.
- LAT is the absolute latitude of the start node N
- LON is the absolute longitude of the start node N.
- the start point node processing unit 132 is not limited to the position information of each start point node Nl to Nn, and the absolute latitude and longitude forces of each start point node Nl to Nn to be transmitted are also barycentric positions. Calculated as relative latitude and longitude from the reference point represented by longitude (LAT, LON), each start point
- the position information of each of the start point nodes Nl to Nn is represented by relative latitude and longitude with the center of gravity of each of the start point nodes Nl to Nn to be transmitted as a reference point.
- the amount of data can be reduced compared to the case where the position information of all the start point nodes N1 to Nn is represented by absolute position information.
- each start point node Nl to Nn by the relative latitude and longitude is the center of gravity of each of the start point nodes Nl to Nn
- each start point node Nl to The amount of data when expressing Nn in relative latitude and longitude can be kept small, and the effect of data amount reduction is greater.
- the center of gravity of each of start point nodes Nl to Nn is used as a reference point, and the center of gravity is The relative latitude and longitude expressed with the reference point as the reference point is considered to be biased to a certain range. Therefore, when the position information transmission unit 140 transmits the reference point, the start point node group, and the shape vector data group, The amount of data can be further reduced by coding with the entropy code ⁇ of the range coder or the like.
- the center of gravity of each of start point nodes Nl to Nn to be transmitted is transmitted as a reference point, but the center of each start point of each of a plurality of vector shapes is It may be the center of gravity of each of a plurality of vector shape starting point nodes to be transmitted at once, or may be the center of all vector shape starting point nodes when transmitting position information of a plurality of vector shapes.
- the starting point node processing unit 132 represents each starting point node by relative latitude and longitude from the reference point which is the center of gravity of each starting point node
- the third embodiment An example in which one of the start point nodes is used as a reference point will be described.
- the difference between this embodiment and the embodiments 1 and 2 is only in the processing in the start point node processing unit 132. Therefore, using the configuration of the embodiment 1 shown in FIG. The description will center on the processing of
- FIG. 6 is a diagram schematically showing a method in which the start point node processing unit 132 according to Embodiment 3 of the present invention converts the start point node of each vector shape into a relative position expression.
- the total extension length of the line segment connecting all the start point nodes Nl to Nn of the shape vector data output from the shape data generation unit 131 is minimum. So that, in order, start point node 1, start point node 2, ⁇ ⁇ ⁇ ⁇ start point node n I assume. as a result.
- the start node Nn shown in FIG. 5 is the start node 1
- the start node N3 is the start node 2
- the start node N1 is the start node 3
- the start node N2 is the start node 4.
- start point node processing unit 132 In the start point node processing unit 132 according to the third embodiment, only the start point node 1 is represented by absolute latitude and longitude, and the start point nodes after the start point node 2 are sequentially relative latitude and longitude from the adjacent previous node. Calculate and use this as position information.
- start point nodes Nl to Nn are rearranged so that the total extension of line segments connecting all start point nodes Nl to Nn is minimized, and the start point which is the start point Since only node 1 is represented by absolute latitude mildness, and the start point nodes other than start point node 1 are expressed by relative latitude and longitude based on absolute latitude mildness of start point node 1, position information of all start point nodes Nl to Nn is absolute
- the amount of data to be transmitted can be reduced compared to the case where it is expressed by latitude and longitude and transmitted.
- only one starting point node 1 which is the starting point among the starting point nodes Nl to Nn is represented by absolute latitude and mildness
- the starting point node other than the starting point node 1 is the absolute value of starting point node 1 Since it is expressed by relative latitude and longitude based on the latitude and latitude, it is not necessary to provide a new reference point other than each of the start point nodes Nl to Nn, and it is not necessary to transmit the position information of the new reference point. However, the amount of data to be transmitted can be reduced.
- nodes close in distance between line segments connecting all of the start point nodes Nl to Nn are connected, and start point nodes other than the start point node 1 are sequentially expressed by relative latitude and longitude. Therefore, the relative latitude and longitude values are considered to be biased to relatively small values. Therefore, when the position information transmitting unit 140 transmits these start point nodes, the data amount can be further reduced by coding using the entropy coding codes of the Huffman coding and the first coding.
- the start point nodes other than the start point node 1 after rearranging all the start point nodes Nl to Nn of each shape vector data are expressed by relative latitude and longitude from the previous node
- the start point node other than the start point node 1 is expressed by the difference in mutation from the previous node, that is, the distance and the relative orientation.
- the actual The difference between this embodiment and the first to third embodiments is only the processing in the start point node processing unit 132. Therefore, the processing of the start point node processing unit 132 in the second embodiment is performed using the configuration of the first embodiment shown in FIG. I will explain to the center.
- FIG. 7 is a diagram schematically showing a method in which the start point node processing unit 132 according to Embodiment 4 of the present invention converts the start point node of each vector shape into relative position representation.
- start point node processing unit 132 rearranges start point nodes Nl to Nn such that the total extension of line segments connecting all the start point nodes Nl to Nn is minimized.
- Start point node 1 start point node 2
- start point node 2 ⁇ ⁇ ⁇ ⁇ Let start point node n.
- the node sequence of the n starting point nodes is regarded as one shape vector data, and each starting point node is, like the shape vector data, the distance from the previous node and the relative orientation It is expressed by the displacement difference with As in the case of the third embodiment, the start point node 1 is used as the start point node which is the start point.
- the start point node 1 which is the start point is represented by absolute latitude and longitude, and the other start point nodes are sequentially Since the information is expressed by the distance from the previous node and the relative orientation, it is not necessary to newly provide a reference point for each starting point node as in the third embodiment, and the amount of data can be effectively and easily made. It can be reduced.
- each shape vector data and the node sequence of the start point node are all expressed by the displacement difference between the distance from the previous node and the relative orientation, respectively. It is possible to reduce the amount of data by putting together data and coding.
- the position information transmitting apparatus 100 includes the start point node processing unit 132 and the position information receiving apparatus 200 includes the start point node restoring unit 231.
- the information transmitting / receiving apparatus 300 includes both the start point node processing unit 132 and the start point node restoration unit 231.
- FIG. 8 is a block diagram showing a configuration of position information transmitting / receiving apparatus 300 according to Embodiment 5 of the present invention.
- the same components as those of position information transmitting apparatus 100 and position information receiving apparatus 200 shown in FIG. 1 are denoted by the same reference numerals.
- the position information transmitting / receiving apparatus 300 according to the fifth embodiment has both the configuration of the position information transmitting apparatus 100 shown in FIG. 1 and the position information receiving apparatus 200.
- a car navigation system with bi-directional communication function which also transmits by receiving vector position information only, a car navigation system with such bi-directional communication function,
- a center apparatus or the like of a traffic information service center that receives positional information from the positional information collection apparatus described in the sixth embodiment and transmits positional information in the shape of a beta can be considered.
- start point node processing unit 132 and start point node restoration unit 231 in position information transmitting / receiving apparatus 300 according to the fifth embodiment are the same as the transmission / reception operations in the first to fourth embodiments described above.
- the sixth embodiment is an application of the position information transmission method of the present invention to a probe force system for collecting position information.
- FIG. 9 is a diagram showing an outline of a probe car system that executes a position information transmission method according to Embodiment 6 of the present invention.
- the probe car system shown in FIG. 9 is operated at regular intervals while the nodes Nl, N2, ⁇ ⁇ ⁇
- a probe car 350 that collects and transmits' locus (position information) and roadside machines installed on the roadside of a road, etc., and multiple pieces of position information that collect position information sent from the probe car 350
- a collection device 400 and a position information processing device 500 that receives and processes position information from the plurality of position information collection devices 400 are configured.
- the position information of each position information collection device 400 is preset by absolute latitude and longitude, and the position information processing device Recognize 500!
- FIG. 10 is a process flow of the probe car system according to the sixth embodiment of the present invention in which the locus (position information) on which the probe car 350 travels is collected in the position information processing apparatus 500 via the plurality of position information collecting devices 400.
- FIG. 10 is a process flow of the probe car system according to the sixth embodiment of the present invention in which the locus (position information) on which the probe car 350 travels is collected in the position information processing apparatus 500 via the plurality of position information collecting devices 400.
- the probe car 350 which is the transmitting side, moves leftward in the left direction in FIG. 9 and each node Nl, N2, ..., Nn-2, Nn-2, Nn-1, Nn, ⁇ at a fixed timing.
- the node Nn is taken as the start point node (shape reference point).
- probe car 350 has the position information of each node N -1 -1, ⁇ -2 2, ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ N 2 and N l prior to the latest node, point node N n Calculated based on the relative position information of the force (step S3020).
- each node Nn As a method of calculating the relative position information of the vehicle position of each node Nn-1, Nn-2, ⁇ , N2, Nl prior to the start point node Nn, each node Nn ⁇ 1, ⁇ ⁇ -2, ⁇ ⁇ ⁇ ⁇
- the relative position information of the vehicle position of N2 and Nl is expressed by relative latitude and longitude, or by the distance from the adjacent node and relative orientation (declination), and the probe car 350 continues to go straight
- the probe car 350 performs position information processing via the position information collecting device 400.
- the probe car 350 By communicating with the device 500, it is determined whether the position information of the plurality of shape vector data collected by the probe car 350 is transmitted to the uplink, ie, the position information processing device 500 via the position information collecting device 400 ( Step S3030).
- step S3 030 "No" when it is determined that the probe car 350 does not uplink the position information of the plurality of shape vector data collected so far to the position information processing apparatus 500 (step S3 030 "No"), Returning to the process of step S3020, the relative position of the node is calculated at a constant timing while traveling, and generation of shape vector data is continued.
- probe car 350 is configured of the plurality of shape vector data collected so far.
- step S3030 "YES” absolute position information of the start point node Nn collected up to now and Pass the location information of each previous node ⁇ -1, ⁇ -2, ⁇ , N2, N1 to the location information collection device 400.
- the position information collecting device 400 converts the absolute position information of the start point node Nn passed from the probe car 350 into relative position information with respect to the absolute position information of the position information collecting device 400, and collects it before the start point node Nn. It transmits to the position information processing apparatus 500 as shape vector data together with relative position information of each node N n ⁇ 1, ⁇ ⁇ ⁇ 2,..., N 2 and N 1 (step S 3040).
- position information processing apparatus 500 on the receiving side receives shape vector data etc. from position information collecting apparatus 400 (S 4010), first, position information collecting apparatus 400 that has transmitted data is specified. Then, the absolute latitude and longitude of the position information collecting device 400 are extracted (S 4020). In position information processing apparatus 500, the absolute latitude and longitude of each position information collecting apparatus 400 are stored in advance.
- position information processing apparatus 500 can extract the extracted position information collecting apparatus. From the absolute latitude and longitude 400 and the received relative position information of the start point node, the absolute latitude and longitude of the start point node is calculated to restore the absolute position (S 4030). Then, based on the absolute latitude and longitude of the start point node, the position information processing apparatus 500 sequentially restores the absolute position of each node of the shape vector data (S 4040).
- a probe car 350 which is a traveling vehicle is regarded as a moving sensor, and probe data from the probe car 350 is collected and used for generation of traffic information and the like.
- probe data from the probe car 350 is collected and used for generation of traffic information and the like.
- it can also be applied to applications such as a method of transmitting a track traveled by the probe car 350.
- the position of the position information collecting apparatus 400 provided on the road is expressed in absolute latitude and longitude and stored in advance
- the position information of the start point node of the vector shape is position information Since it is expressed by relative position information based on the absolute latitude and longitude of the collection unit 400 and transmitted to the position information processing unit 500, the start point node of each vector shape is expressed by absolute latitude and longitude and compared with the case of transmission. Reduce the amount of data sent He is happy.
- probe car 350 which is the transmitting side, travels at a constant timing while each node Nl, N2, ..., Nn-2, Nn-1,. Since the position information of Nn is collected and the shape vector is created, the absolute position information is calculated with the latest node Nn as the starting point node and the node row of the traveled locus, so communication capacity, communication environment, etc. Under this condition, if it is not possible to transmit all the data of shape vector data, it is possible to delete the old node data, and it is possible to transmit the latest node data with priority.
- the position information collection device 400 transmits the shape vector data collected from the probe car 350 to the position information processing device 500.
- the function of collecting vector data and transmitting functions has the ability to store in advance the absolute position information of multiple position information collecting devices 400 to be traveled by the probe power to be transmitted by the probe 350 or to obtain them from a server such as the position information processing device 500.
- the prober 350 itself creates shape vector data, it converts absolute position information of the start point node into relative position information based on the absolute position information of the position information collecting apparatus 400, and performs position information processing Of course, it may be transmitted to the device 500.
- the position information of each node constituting the shape vector data is the distance from the previous node and the relative orientation
- the present invention is not limited to this, and it is of course possible to express by relative latitude and longitude based on the position of the previous node, and it is also possible to adaptively express these. It is good even if you choose.
- the position information transmission method of the digital map, position information transmitting device, and position information receiving device of the present invention reduce the amount of data even when vector shape on the digital map is expressed by position information of a plurality of nodes and transmitted.
- Services for terminals that can display digital maps such as navigation on-board units and mobile terminals, When a provider or a broadcaster provides traffic information such as traffic congestion information or travel time, or POI (Point Of Interest) information such as a station or facility, etc., location information or any event location such as an accident.
- traffic information such as traffic congestion information or travel time, or POI (Point Of Interest) information
- POI Point Of Interest
- the traveling vehicle travels in a probe car system which is regarded as a sensor for moving the traveling vehicle, collects data (probe data) from the traveling vehicle, and is used for generating traffic information and the like. It can be applied to applications such as the method of transmitting these trajectories.
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EP05739345A EP1755096A1 (en) | 2004-05-24 | 2005-05-16 | Digital map position information transmitting method, position information transmitter, and position information receiver |
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JP2004153858A JP2005338193A (ja) | 2004-05-24 | 2004-05-24 | デジタル地図の位置情報伝達方法、位置情報送信装置および位置情報受信装置 |
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EP (1) | EP1755096A1 (ja) |
JP (1) | JP2005338193A (ja) |
CN (1) | CN1957383A (ja) |
WO (1) | WO2005114618A1 (ja) |
Families Citing this family (6)
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TWI374255B (en) * | 2008-07-24 | 2012-10-11 | Htc Corp | Method and system for synchronizing mark on electronic map and computer program product using the same |
JP4836289B2 (ja) * | 2009-04-08 | 2011-12-14 | ヤフー株式会社 | 圧縮装置、ルート検索装置、ナビゲーションシステム、圧縮装置の動作方法、ルート検索装置の動作方法、およびナビゲーション装置の動作方法 |
JP2011170627A (ja) * | 2010-02-18 | 2011-09-01 | Sumitomo Electric Ind Ltd | 交通情報通信システム、移動端末装置、情報処理装置、アップリンク情報の生成方法及び処理方法、地図データ構造、アップリンク情報のデータ構造 |
CN104990554B (zh) * | 2015-05-04 | 2018-03-13 | 南京邮电大学 | Gnss盲区中基于vanet车辆间协作的惯性导航定位方法 |
JP2016212628A (ja) * | 2015-05-08 | 2016-12-15 | スズキ株式会社 | 位置情報共有システムおよび送受信端末 |
US9694766B2 (en) * | 2015-06-16 | 2017-07-04 | Ford Global Technologies, Llc | Compression algorithms for vehicle-bus-messaging of preview data |
Citations (2)
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JP2001056823A (ja) * | 1998-11-24 | 2001-02-27 | Matsushita Electric Ind Co Ltd | デジタル地図ファイルのデータ構造 |
JP2003023357A (ja) * | 2001-05-01 | 2003-01-24 | Matsushita Electric Ind Co Ltd | デジタル地図の形状ベクトルの符号化方法と位置情報伝達方法とそれを実施する装置 |
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2004
- 2004-05-24 JP JP2004153858A patent/JP2005338193A/ja not_active Withdrawn
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2005
- 2005-05-16 EP EP05739345A patent/EP1755096A1/en not_active Withdrawn
- 2005-05-16 CN CNA2005800167282A patent/CN1957383A/zh not_active Withdrawn
- 2005-05-16 WO PCT/JP2005/008919 patent/WO2005114618A1/ja not_active Application Discontinuation
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001056823A (ja) * | 1998-11-24 | 2001-02-27 | Matsushita Electric Ind Co Ltd | デジタル地図ファイルのデータ構造 |
JP2003023357A (ja) * | 2001-05-01 | 2003-01-24 | Matsushita Electric Ind Co Ltd | デジタル地図の形状ベクトルの符号化方法と位置情報伝達方法とそれを実施する装置 |
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EP1755096A1 (en) | 2007-02-21 |
CN1957383A (zh) | 2007-05-02 |
JP2005338193A (ja) | 2005-12-08 |
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