JP4297626B2 - Map data correction method and map data correction program - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a technique for correcting map data using positioning data from a moving body.
[0002]
[Prior art]
For example, Japanese Patent Laid-Open No. 10-289396 discloses a process when road data differs from an actual road shape due to road repair or the like in order to control the shift stage of an automatic transmission of a vehicle based on road data. ing. That is, when the current position deviates from the position on the road data, the vehicle navigation device transmits the deviated position to the base station side. When the correction data is transmitted from the vehicle side, the base station corrects the map data based on the transmitted data.
[0003]
[Problems to be solved by the invention]
In this publication, since the difference between the vehicle and the map is calculated, the processing load on the vehicle is large. Further, since it is an invention for controlling an automatic transmission, a difference in curvature of a curve on a road is a problem. In addition, since the main purpose is to detect the modification of a road whose road data is greatly changed, the road data is not corrected unless a predetermined number or more of the same road correction data is collected. However, there is a case where a map is created using incorrect position data at the time of creating a map even if the road is not actually renovated. Even in such a case, the map data should be corrected. The measurement value always includes an error, and it is considered that the situation where a predetermined number or more of the same road correction data is collected does not occur as in this publication. In particular, when the road data is finely adjusted, it is considered that the correction is hardly performed in this publication.
[0004]
Therefore, an object of the present invention is to provide a technique for correcting map data with high accuracy.
[0005]
Another object is to provide a technique for enabling acquisition of more position information.
[0006]
[Means for Solving the Problems]
The map data correction method of the present invention acquires time-series position data measured by a plurality of moving bodies (for example, a vehicle, for example, the moving body 1 in the embodiment), and obtains a time-series position data storage unit (for example, an implementation). The acquisition step (for example, step S11 in the embodiment: FIG. 4) stored in the travel route DB 32 in the embodiment and the predetermined position in the map data stored in the map data storage unit (for example, the map data DB 34 in the embodiment) And a step of calculating the difference between the position corresponding to the predetermined position in the map data and the position obtained from the time-series position data stored in the time-series position data storage unit and storing it in the storage device (for example, in the embodiment) Step S13: FIG. 4) and a representative value of the difference for each predetermined position in the map data (for example, a simple average or a weighted average indicating an average tendency of the distribution) And the like (step S15 in the embodiment: FIG. 4) and the representative value of the difference exceeds a predetermined reference, the predetermined position in the map data is A step of correcting using the representative value of the difference and storing the corrected position data in the map data storage unit (for example, step S17 in the embodiment: FIG. 4).
[0007]
According to the present invention, by calculating the representative value of the difference from the map data, the error can be statistically canceled, and the map data can be corrected with more accurate data.
[0008]
Further, based on the time-series position data stored in the time-series position data storage unit, the movement distance is aggregated for each moving body and stored in the storage device (for example, step S23 in the embodiment: FIG. 8). ) And a step (for example, the process of FIG. 12) of performing a process for giving a predetermined privilege to the holder of the mobile body based on the total travel distance is also possible. . A privilege corresponding to the travel distance is given as a consideration for cooperating with the map data correction.
[0009]
Further, in the travel distance counting step described above, based on the time-series position data, the new route travel distance and the same route travel distance that has already been passed are determined with a predetermined weight for each moving object. A configuration in which addition is performed is also possible. For example, the travel distance is totaled by a calculation of new route travel distance × A + same route travel distance × B. Here, A and B are weights, and for example, A = 1 and B = 0 may be adopted. This is because it is helpful to obtain map data for a wide range of roads evenly.
[0010]
Further, based on the time-series position data stored in the time-series position data storage unit, a step of counting the number of moving bodies for each predetermined section of the road for a predetermined time zone and storing it in a storage device (for example, in the embodiment) Step S91: A configuration further including FIG. 14) is also possible. As a result, the traffic volume can be grasped for each road, and the fluctuation amount with time can be calculated.
[0011]
As the representative value, a value representing a central tendency of the distribution, which is used in statistical processing, such as an average value by a simple average or a weighted average, or a median value or a mode value, is used.
[0012]
The map data correction method of the present invention can be implemented by a program for executing the map data correction method. In this case, the program includes, for example, a floppy disk, a CD-ROM, a magneto-optical disk, It is stored in a storage medium or storage device such as a semiconductor memory or a hard disk. The program may be transmitted via a network. Note that data being processed is temporarily stored in the memory of the computer.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows a system outline diagram according to an embodiment of the present invention. For example, a plurality of moving bodies 1 that are automobiles include, for example, a position information acquisition unit 11 that measures its own position over time using a signal from a GPS (Global Positioning System) satellite 5, and the position information acquisition unit 11. A travel route data file 15 that stores the acquired position information in time series and a transmission unit 13 that transmits the content of the travel route data file 15 regularly or irregularly are included. The moving body 1 is not limited to an automobile, and may be, for example, a bicycle or a person holding a device including at least the position information acquisition unit 11 and the travel route data file 15. Moreover, the transmission part 13 may be connected to a mobile phone or a PHS (Personal Handyphone System) phone to transmit information.
[0014]
In the present embodiment, the transmitter 13 of the mobile unit 1 wirelessly transmits information in the travel route data file 15 to the radio base station 7, and the radio base station 7 passes through a wired network such as the public line network 9. The data is transferred to the center server 3.
[0015]
However, the configuration may be such that information in the travel route data file 15 is directly transmitted to the center server 3 from the transmission unit 13 of the mobile body 1 or transmission from the radio base station 7 to the center server 3. Also, the configuration may be such that wireless communication is used instead of wired communication. Further, when the mobile unit 1 includes a device that can read and write to any recording medium, the information of the travel route data file 15 is written to the recording medium, and the recording medium is stored in the center The configuration may be such that mail is sent to the center operator who operates the server 3. Also, instead of transmitting from the mobile unit 1 to the center server 3, the information of the travel route data file 15 stored in the recording medium is read into another computer and transmitted from the other computer to the center server 3. Such a configuration may be adopted. Further, the GPS is an example, and a configuration for measuring position information by another method may be used.
[0016]
The center server 3 receives, for example, travel route data (time-series position data) sent from each mobile unit 1 via the public line network 9 and registers it in the travel route DB 32, and each mobile unit. 1 obtained by map matching with a travel route DB 32 for storing travel route data sent from 1, a map data DB 34 for storing position information of each point on the road, and position data of each point in the map data DB 34, and A comparison unit 33 that compares corresponding position data in the travel route DB 32 and a correction unit 35 that corrects position data of each point on the road based on the comparison result of the comparison unit 33 are included. These processing units can correct the map data.
[0017]
Further, the center server 3 refers to the travel route DB 32, generates travel record data of each mobile unit 1, and generates a travel distance processing unit 51 that stores the travel record data file 52 in the travel result data file 52. The travel result data file 52 for storing the travel result data of each mobile body 1 and the cumulative travel distance data of each mobile body 1 are generated with reference to the travel result data file 52, and the cumulative travel distance data file Reference is made to a mileage accumulating unit 53 stored in 54, an accumulated mileage data file 54 storing accumulated mileage data of each mobile 1 generated by the mileage accumulating unit 53, and an accumulated mileage data file 54. And a user service processing unit 55 that performs processing for services to the user of the mobile unit 1. Thereby, the process for providing the privilege with respect to the user of each moving body can be implemented.
[0018]
Further, the center server 3 refers to the travel record data file 52 and aggregates the traffic volume for each road section, for example, in units of one hour, and stores it in the traffic volume data file 73. A traffic volume data file 73 for storing the traffic volume data tabulated by the travel performance processing section 71, and a traffic volume processing section 75 for collecting the traffic volume data in a predetermined unit with reference to the traffic volume data file 73. Including. Thereby, it becomes possible to grasp or estimate the traffic volume for each road or time.
[0019]
The center server 3 may realize the above functions with a single computer, or may realize the above functions with a plurality of computers. Further, it may be realized by a combination of a computer program and ordinary computer hardware, or may be realized by combining a dedicated electronic circuit.
[0020]
Next, processing in each moving body 1 will be described with reference to FIG. Position of mobile 1 information The acquisition unit 11 periodically acquires position information during traveling when the moving body 1 starts moving or according to an instruction from the user of the moving body 1, and includes time information in the traveling route data file 15. Register (step S1). The data format stored in the travel route data file 15 is, for example, as shown in FIG. That is, it includes information on the mobile code, time (year / month / day / hour / minute / second: yyyymmddhhmmss), and latitude (degree), longitude (degree), and altitude (m) at that time. Furthermore, information on longitude error (degree), latitude error (degree), and altitude error (m) is also acquired and registered in the travel route data file 15. These pieces of error information are data indicating the range of fluctuation of the position information acquired by the moving body 1.
[0021]
And it is judged whether the transmission timing by the transmission part 13 was reached (step S3). This transmission timing is arbitrary and may be once a day or once a week, for example. Further, the transmission timing instructed by the user of the mobile unit 1 may be followed without automatically determining the transmission timing. If it is not the transmission timing, the process proceeds to step S7. On the other hand, when it is determined that the transmission timing is reached, the transmission unit 13 transmits untransmitted position information and time information (step S5). Error information is also transmitted. Such a process is repeated until the process ends (step S7). However, the end of the process may be determined as the end of the process when the user of the moving body 1 is instructed, or the process may be automatically ended when the movement of the moving body 1 stops for a predetermined time or more. good.
[0022]
Further, the data of the travel route data file 15 may be configured to be deleted when transmitted by the transmission unit 13, or by adding information on what data has been transmitted, It may be configured to accumulate as long as one storage capacity permits.
[0023]
The position information, time information, and error information transmitted by the transmission unit 13 in this way are transferred to the center server 3 via the radio base station 7, the public line network 9, and the like.
[0024]
Next, processing in the center server 3 will be described with reference to FIGS. First, map data correction processing will be described with reference to FIGS. The receiving unit 31 of the center server 3 receives the position information and time information from each mobile body 1 and registers them in the travel route DB 32 (step S11). Also, error information is received and registered in the travel route DB 32. For example, data similar to that shown in FIG. 3 is stored in the travel route DB 32. Next, the comparison unit 33 calculates the difference (Δr) between the received position information (stored in the travel route DB 32) and the position information in the map data DB 34 for each reference point of the road (step S13). This process will be described with reference to FIG.
[0025]
For example, it is assumed that a road registered in the map data DB 34 has an A-B-C shape (shown by a dotted line) as shown in FIG. On the other hand, it is assumed that the travel route is AB′-C ′ from the position information and time information stored in the travel route DB 32. Thus, the road ABC registered in the map data DB 34 may actually be AB′-C ′. Therefore, a point on the travel route corresponding to each reference point provided on the road (X in the example of FIG. 5; provided every 1 km, for example) is obtained by the map matching technique. In the example of FIG. 5, the point corresponding to X is X ′. The map matching technique is a well-known technique and will not be described further here. Note that the position information at X ′ is calculated by interpolation of surrounding position information when the position information itself is not included in the travel route DB 32.
[0026]
Then, the comparison unit 33 calculates Δr = XX ′. X is a position vector of X expressed in a certain coordinate system, and X ′ is a position vector of X ′ expressed in the same coordinate system. Δr is in the form of Δx, Δy, Δz when expressed in the earth fixed coordinate system. The comparison unit 33 performs the above calculation from the position information and time information from each moving body 1 and generates data as shown in FIG. 6 for each reference point of the road. That is, for each road reference point (point specified by longitude (degrees) and latitude (degrees)), for example, a serial number indicating the number of times of travel (including travel on different mobile bodies as well as the same mobile body) and at that time Δx, Δy, and Δz are included.
[0027]
In addition, when error information exceeds a predetermined threshold value, a configuration in which position information and time information are not registered in the travel route DB 32 in step S11 or a configuration in which the error information is excluded from the calculation target in step S13 is possible. In this way, it is possible to eliminate data when the error is larger than a certain value, that is, when the quality of the position information acquired by the mobile body 1 is poor.
[0028]
Next, the correction unit 35 adds all the differences for each road reference point among the data as shown in FIG. 6 calculated by the comparison unit 33 for each Δx, Δy, Δz, and calculates the cumulative value of Δx as the number of Δx. (Maximum value of serial number), the cumulative value of Δy is divided by the number of Δy (maximum value of serial number), and the cumulative value of Δz is divided by the number of Δz (maximum value of serial number) (step S15). The result of the division is the average value of Δx, Δy, Δz. This average value is close to 0 if it is assumed that the map data is accurate and the position information acquired by the position information acquisition unit 11 of the mobile object 1 varies according to a Gaussian distribution with a certain error. Let's go. However, if the map data is inaccurate, the average values of Δx, Δy, and Δz are predicted to deviate from zero. That is, as shown in FIG. 7A, if the map data is accurate, Δx (same for Δy and Δz) takes a Gaussian distribution centered on zero. However, if the map data is inaccurate, Δx takes a Gaussian distribution centered on a point that deviates from 0 by the average value of Δx. Therefore, if the average value of Δx is used as the correction amount, the map data can be corrected to an accurate value. Note that variation from the average value for each of Δx, Δy, and Δz (standard deviation σ _x , Σ _y , Σ _y ) Is also calculated. In some cases, instead of the average value, a value representing the central tendency of the distribution used in statistical processing, such as a median value or a mode value, may be calculated.
[0029]
Therefore, the correction unit 35 uses the average values of the differences Δx, Δy, Δz for the reference points having the average values of the differences Δx, Δy, Δz that exceed a predetermined reference (0 in this example), the map in the map data DB 34. The data is corrected, and the corrected map data is registered in the map data DB 34 (step S17). The average value of Δx, Δy, Δz is the standard deviation σ _x , Σ _y , Σ _y If it exceeds, map data may be modified. Further, instead of using the average value as a reference or correcting with the average value, correction may be performed with a value representing the central tendency of the distribution such as the median value or the mode value.
[0030]
In this way, based on the position information measured by the plurality of moving bodies 1, the center server 3 performs map data DB3. 4 The map data can be corrected. In addition, the structure which transmits the corrected map data to the mobile body 1 may be sufficient. Further, in the present embodiment, the correction is not performed based on the difference between the map data and the travel data, which is calculated based on the position information from one moving body, but based on the position information from a plurality of moving bodies, Since a process for canceling the error included in each position information is performed, a more accurate correction amount can be calculated, and more accurate map data can be obtained.
[0031]
Next, a process for giving a privilege to the user of the moving body 1 will be described with reference to FIGS. FIG. 8 shows preprocessing. First, the travel distance processing unit 51 calculates a travel route and a distance for each moving body 1 (step S21). In the present embodiment, the mileage processing unit 51 does not simply calculate the mileage of the mobile body 1 but rather travels as many roads as possible and acquires information about many roads. Even if the vehicle travels twice or more, a process is performed so that the second and subsequent minutes are not included in the cumulative travel distance. However, the second and subsequent minutes may be converted to be shorter than the first time and accumulated. More generally, the configuration may be such that it is determined whether the route is a new route or a route that has already been measured, and totalization is performed with respective weightings. Details of the processing in step S21 will be described with reference to FIG. Then, the calculation result of step S21 is registered in the travel record data file 52.
[0032]
The data format of the running record data file 52 is, for example, as shown in FIG. That is, for each moving object code, road identification information (road number), travel date (year / month / day: yymmddhh), start position (From (longitude)), start position (From (latitude)), destination position (to ( Longitude)), destination position (To (latitude)), distance, and flag. Thus, in this embodiment, if the road number changes, the line is changed and recorded. In the flag column, 0 is stored for a road section that has traveled before, and 1 is stored for a road section that has not traveled before. Therefore, even if the road number is the same, if the section has traveled in the past, 0 is stored in the flag column, and if the section has never traveled in the past, the row is changed to 1 in the flag column. To store. Conversely, even if the road number is the same, if the vehicle has traveled in a section that has not traveled in the past, 1 is stored in the flag column, and if the vehicle has traveled in the past, the line is changed to change the flag. 0 is stored in the column. In order to simplify the calculation in later processing, the distance is stored only in the row where the flag is 1 in the distance column.
[0033]
The travel distance accumulating unit 53 refers to the travel performance data file 52, accumulates the travel distance for each mobile body 1, and registers the accumulated travel distance in the accumulated travel distance data file 54 (step S23). Accumulation An example of the data format of the mileage data file 54 is shown in FIG. Thus, the mobile body code and the accumulated travel distance data are stored in pairs. As will be described later, the user service processing unit 55 creates response data based on the accumulated mileage data file 54 in response to various inquiries from the user terminal, for example, and returns the response data to the user terminal.
[0034]
Next, details of step S21 will be described with reference to FIG. First, the first two pieces of position information are acquired from the travel route DB 32, the road number of the road on which the vehicle is traveling is specified, and registered in one line of the travel record data file 52 (step S31). Then, the start position (From) and the destination position (To) are registered in the line where the road number is registered (step S33).
[0035]
Then, it is determined whether or not the road number section has been traveled before (step S35). If it is a section that has traveled, the process proceeds to step S53. On the other hand, if it is a section that has not traveled, it is determined whether or not to end the process (step S37). If it is determined that the process is to be terminated, the process is terminated as it is, and the process proceeds to step S23 in FIG. On the other hand, if it is determined not to end the process, the next position information is acquired from the travel route DB 32 (step S39). Then, it is determined whether or not the section from the already registered destination position to the position information acquired this time has been traveled before (step S41).
[0036]
If it is a section that has traveled before (step S41: Yes route), it has shifted from a section that has never traveled to a section that has traveled Will be . Therefore, since the line must be changed in the travel record data file 52, the process proceeds to step S47. On the other hand, if the section has never traveled (step S41: No route), it is determined whether the road number has changed (step S43). If the road number has changed (step S43: Yes route), the line must be changed in the travel record data file 52, and the process proceeds to step S47. On the other hand, if the road number has not changed (step S43: No route), there is no need to change the line, and the current line of the travel record data file 52 is obtained using the acquired position information as the destination information (To). Is updated (step S45). Then, the process returns to step S37.
[0037]
When the line has to be changed (step S41: Yes route and step S43: Yes route), the start position (acquired position) of the section that has already traveled the destination position (To) of the current line in the travel record data file 52 In this case, the information is updated to the destination information already registered and the position included in the section up to the position information acquired this time (step S47). Then, the flag in the running record data file 52 is set to 1 (step S49). Further, the travel distance is calculated with reference to the map data DB 34 and stored in the distance column of the current line (step S51). Then, the process returns to step S31. In step S31, if the road number is not changed, the road number of the previous line is specified and registered in a new line. On the other hand, if the road number is changed, the changed road number is specified and registered in a new line. In step S33, the movement destination position (To) of the previous line is registered in the current line as the start position (From), and the next movement destination information acquired in step S39 is registered in the current line as the movement destination position (To). sign up. Thereafter, the same processing is performed.
[0038]
Also, if it is determined in step S35 that the process proceeds to step S53, it is first determined whether or not to end the process (step S53). If it is determined that the process is to be terminated, the process is terminated as it is, and the process proceeds to step S23 in FIG. On the other hand, if it is determined not to end the process, the next position information is acquired from the travel route DB 32 (step S55). Then, it is determined whether or not the section from the already registered destination position to the position information acquired this time has been traveled before (step S57).
[0039]
If it is a section that has not traveled before (step S57: No route), since the section that has traveled has shifted to a section that has not traveled, a line is recorded in the travel record data file 52. Must be changed. Therefore, the process proceeds to step S63. On the other hand, if it is a section that has still traveled (step S57: Yes route), it is determined whether the road number has changed (step S59). If the road number has changed (step S59: Yes route), the line must be changed in the running record data file 52, and the process proceeds to step S63. On the other hand, if the road number has not changed (step S59: No route), there is no need to change the line, and the current line of the driving record data file 52 is obtained using the acquired position information as the destination information (To). Is updated (step S61). Then, the process returns to step S53. In addition, about the route which has traveled before, the structure which registered the weighting with respect to the said route in the column of distance may be sufficient.
[0040]
When it is necessary to change the line (step S57: No route and step S59: Yes route), the travel destination position (To) of the current line in the travel record data file 52 has never traveled before. Ward In some cases, it is not the same as the acquired position information. In this case, it is updated to the already registered destination information and the position included in the section up to the currently acquired position information (step S63). . Then, the flag in the running record data file 52 is set to 0 (step S65). This time, the distance is not calculated because it is not an accumulation target run. Then, the process returns to step S31. In step S31, if the road number is not changed, the road number of the previous line is specified and registered in a new line. On the other hand, if the road number is changed, the changed road number is specified and registered in a new line. In step S33, the movement destination position (To) of the previous line is registered in the current line as the start position (From), and the next movement destination information acquired in step S55 is registered in the current line as the movement destination position (To). sign up. Thereafter, the same processing is performed.
[0041]
In this way, it is possible to generate the travel record data file 52 as described in FIG. If this traveling result data file 52 is generated, the traveling distance accumulating unit 53 can easily obtain the accumulated traveling distance by adding all the numbers in the distance column. In the case of a configuration in which a route that has traveled before is also registered in the distance column with a weight applied to the route, (new route travel distance (cumulative travel distance with flag 1)) ) × 1.0 (weight) + (travel distance of a route that has already traveled (cumulative travel distance when flag is 0)) × 0.5 (weight) Is also possible. 1.0 and 0.5 are examples. Routes that have already been traveled are also useful as data for map correction, giving a great incentive to people who use cars for commuting and the like, and more data can be collected.
[0042]
Next, an example of the process for giving a privilege to a user is demonstrated using FIG. This process is an example of data exchange between the user service processing unit 55 of the center server 3 and a user terminal (not shown, for example, a device such as a personal computer, a mobile phone, or a mobile terminal). In this case, it is assumed that the user service processing unit 55 has, for example, a web (Web) server function, and the user terminal has a web browser function. In addition, although the exchange between computers is shown here, the structure where a user makes a request using a telephone, obtains information, or makes an application may be used. In this case, for example, the user service processing unit 55 may have an automatic voice response function.
[0043]
First, the user operates the user terminal to transmit a cumulative travel distance confirmation request including a moving body code to the user service processing unit 55 (step S71). In response to this, the user service processing unit 55 receives the cumulative travel distance confirmation request including the mobile body code (step S73), refers to the cumulative travel distance data file 54, and corresponds to the received mobile body code. Accumulated travel distance data is acquired (step S75). Then, the service rank is specified by referring to the service provision rank table using the accumulated mileage data (step S77). An example of the service provision rank table is shown in FIG. Here, the rank is A rank from 500Km, B rank from 501Km to 1000Km, C rank from 1001Km to 2000Km, D rank from 2001Km to 4000Km, E rank from 4001Km to 10000Km, and F rank from 10001Km onwards. ing.
[0044]
The user service processing unit 55 transmits the acquired cumulative travel distance data and the specified rank information to the user terminal (step S79). The user terminal receives the accumulated mileage data and rank information from the user service processing unit 55 and displays them on the display device (step S81). As a result, the user can check his / her cumulative travel distance and know the ranks of services that can be enjoyed.
[0045]
Here, the service refers to, for example, cashback according to the rank (including electronic money), supply of gasoline according to the rank, provision of cash vouchers according to the rank, provision of the latest electronic map data, according to the rank Such as providing discounts. However, the present embodiment is not limited to these.
[0046]
If the user wishes to provide a service from the center at this point, the user terminal is operated to transmit a service enjoyment application to the user / service processing unit 55 (step S83). The user service processing unit 55 of the center server 3 receives the service enjoyment application from the user terminal. (Step S85) Then, processing for providing the service is performed (step S87). For example, in the case of cash back, processing for transfer to the user's bank account, in the case of providing a cash voucher, processing for shipping to the user, in the case of providing a discount, for shipping of a discount ticket, etc. The process etc. is implemented. The center operator can automatically and continuously acquire a large amount of position information from the user's moving body 1 without carrying out surveying surveys, and can correct map data at low cost. become. A part of this floating cost is provided to the user. In this way, the user can obtain a service as a price for collecting location information, so that many users participate in this system.
[0047]
In the description of FIG. 12, an example in which only the cumulative travel distance is provided is shown. However, for example, the configuration is such that the information on the travel route DB 32 and the information on the travel performance data file 52 are provided from the user service processing unit 55. May be. When various services are provided, information on a service provision selection screen is transmitted from the user service processing unit 55 and displayed on the user terminal, and information on the service selected by the user is displayed on the user service processing unit. The configuration may be such that 55 receives and performs the process for providing the selection service.
[0048]
Next, a process for counting traffic data will be described with reference to FIGS. 14 and 15. The travel performance processing unit 71 refers to the travel performance data file 52, counts the number of traffic per hour for each section of the road, and registers it in the traffic data file 73 (step S91). For example, in the travel record data file 52, the number of lines having a predetermined road number and including a predetermined start position (or range thereof) and destination position (or range thereof) is counted. An example of the traffic data file 73 is shown in FIG. Here, for each date and time (year / month / day / hour: yymmddhh), a road number, a section number, and the number of traffic per hour are stored.
[0049]
Then, the traffic volume processing unit 75 totals the traffic volume (number of mobile bodies 1) in a specific time unit or road section unit and stores it in the storage device (step S93). For example, the calculation is performed for each specific time zone, each season, or each road section. The aggregation unit is set in advance. However, since the process of FIG. 14 may be a batch process, settings are made in advance to obtain information necessary for the center operator. The traffic processing unit 75 outputs corresponding data in response to a request from the center operator (step S95). It is also possible to adopt a configuration that automatically outputs instead of responding to a request. Furthermore, the configuration may be such that the actual traffic volume is estimated according to a predetermined rule from the counting result, in addition to the counting. Moreover, the structure which outputs not only to a center operator but according to the request | requirement from a user may be sufficient.
[0050]
In this way, it can be used for various purposes such as predicting the congestion situation (such as traffic jams), planning road expansion plans, and opening store plans.
[0051]
Although one embodiment of the present invention has been described above, the present invention is not limited to this. For example, the running record data file 52 is configured to record only the start position, the destination position, and the distance as described above, but is configured to further calculate and store speed and acceleration information. Is also possible. In this way, abnormal conditions such as sudden braking that occurs during operation can be acquired together with the position where it occurred, and it is also possible to estimate the danger of traffic at a specific position on the road Become. If it is a mountainous area, it is also possible to estimate the road difficulty (the degree of maintenance) of the road. As described above, more complicated processing may be performed by using data stored in the travel route DB 32 or collecting more data from the moving body 1.
[0052]
(Appendix 1)
An acquisition step of acquiring time-series position data measured by a plurality of moving bodies and storing it in a time-series position data storage unit;
A difference between a predetermined position in the map data stored in the map data storage unit and a position corresponding to the predetermined position in the map data and obtained from the time series position data stored in the time series position data storage unit A step of calculating
Calculating a representative value of the difference for each predetermined position in the map data;
When the representative value of the difference exceeds a predetermined reference, the predetermined position in the map data is corrected using the representative value of the difference, and the corrected position data is stored in the map data storage unit When,
Map data correction method including.
[0053]
(Appendix 2)
Based on the time-series position data stored in the time-series position data storage unit, a movement distance counting step of totaling the movement distance for each moving body,
Implementing a process for giving a predetermined privilege to the holder of the mobile body based on the total travel distance;
The map data correction method according to appendix 1, further comprising:
[0054]
(Appendix 3)
In the moving distance counting step,
Judge whether the route is a new route or a route that has already been measured with respect to the travel distance, and add up each weight.
The map data correction method according to supplementary note 2, characterized by:
[0055]
(Appendix 4)
Counting the number of moving bodies for each predetermined section of the road for a predetermined time zone based on the time-series position data stored in the time-series position data storage unit;
The map data correction method according to any one of supplementary notes 1 to 3, further including:
[0056]
(Appendix 5)
From the time-series position data stored in the time-series position data storage unit, for each moving object, road identification information, moving time information, moving start position, moving end position information, and moving distance information for the moving object. Step to calculate
The map data correction method according to any one of supplementary notes 1 to 4, further including:
[0057]
(Appendix 6)
In the obtaining step,
Obtaining error information of time-series position data measured by the plurality of moving bodies;
Calculating the difference,
When the error information satisfies a predetermined condition, the corresponding time-series position data is excluded from calculation.
The map data correction method according to any one of appendices 1 to 5, characterized in that:
[0058]
(Appendix 7)
Means for acquiring time-series position data measured by a plurality of mobile objects and storing the time-series position data in a time-series position data storage unit;
A difference between a predetermined position in the map data stored in the map data storage unit and a position corresponding to the predetermined position in the map data and obtained from the time series position data stored in the time series position data storage unit A means of calculating
Means for calculating a representative value of the difference for each predetermined position in the map data;
Means for correcting a predetermined position in the map data using the representative value of the difference and storing the corrected position data in the map data storage unit if the representative value of the difference exceeds a predetermined reference When,
A map data correction device.
[0059]
(Appendix 8)
On the computer,
Acquiring time-series position data measured by a plurality of mobile objects and storing the time-series position data in a time-series position data storage unit;
A difference between a predetermined position in the map data stored in the map data storage unit and a position corresponding to the predetermined position in the map data and obtained from the time series position data stored in the time series position data storage unit A step of calculating
Calculating a representative value of the difference for each predetermined position in the map data;
When the representative value of the difference exceeds a predetermined reference, the predetermined position in the map data is corrected using the representative value of the difference, and the corrected position data is stored in the map data storage unit When,
Map data correction program to execute.
[0060]
(Appendix 9)
On the computer,
Acquiring time-series position data measured by a plurality of mobile objects and storing the time-series position data in a time-series position data storage unit;
A difference between a predetermined position in the map data stored in the map data storage unit and a position corresponding to the predetermined position in the map data and obtained from the time series position data stored in the time series position data storage unit A step of calculating
Calculating a representative value of the difference for each predetermined position in the map data;
When the representative value of the difference exceeds a predetermined reference, the predetermined position in the map data is corrected using the representative value of the difference, and the corrected position data is stored in the map data storage unit When,
A recording medium storing a map data correction program for executing the program.
[0061]
【The invention's effect】
As described above, map data can be corrected with high accuracy according to the present invention.
[0062]
Moreover, since a privilege can be given with respect to the user who provides positional information, more positional information can be acquired now. In addition, various traffic data can be used.
[Brief description of the drawings]
FIG. 1 is a diagram showing an overview of a system according to an embodiment of the present invention.
FIG. 2 is a diagram showing a processing flow in a mobile object.
FIG. 3 is a diagram showing an example of a data format of a travel route data file.
FIG. 4 is a diagram showing a processing flow for correcting map data.
FIG. 5 is a schematic diagram showing the correspondence between map data and travel data.
FIG. 6 is a diagram illustrating an example of a processing result in a comparison unit.
FIG. 7 is a diagram for explaining the principle of map data correction. (A) shows an example when map data is accurate, and (b) shows an example when map data is inaccurate.
FIG. 8 is a diagram showing a processing flow for accumulating the travel distance of each mobile object.
FIG. 9 Driving performance It is a figure which shows an example of the data format of a data file.
FIG. 10 Cumulative mileage It is a figure which shows an example of the data format of a data file.
FIG. 11 is a diagram showing a flow of processing for generating a driving record data file.
FIG. 12 is a diagram for explaining processing of a user service processing unit;
FIG. 13 is a diagram illustrating an example of a service provision rank table.
FIG. 14 is a diagram showing a traffic volume calculation processing flow.
FIG. 15 is a diagram illustrating a data format example of a traffic volume data file.

Claims (2)

A map data correction method executed by a computer,
An acquisition step of acquiring time-series position data measured by a plurality of moving bodies and storing it in a time-series position data storage unit;
A difference between a predetermined position in the map data stored in the map data storage unit and a position corresponding to the predetermined position in the map data and obtained from the time series position data stored in the time series position data storage unit A step of calculating
Calculating a representative value of the difference for each predetermined position in the map data;
When the representative value of the difference exceeds a predetermined reference, the predetermined position in the map data is corrected using the representative value of the difference, and the corrected position data is stored in the map data storage unit When,
For each of the moving bodies, a new route portion and a route portion that has already been measured for the route specified by the time-series position data stored in the time-series position data storage unit are specified, and the new route portion Totaling the moving distance and the moving distance of the portion of the already measured route with different weights,
Implementing a process for giving a predetermined privilege to a holder of the moving body based on the moving distance counted for each moving body;
The map data correction method, wherein the computer executes On the computer,
Acquiring time-series position data measured by a plurality of mobile objects and storing the time-series position data in a time-series position data storage unit;
A difference between a predetermined position in the map data stored in the map data storage unit and a position corresponding to the predetermined position in the map data and obtained from the time series position data stored in the time series position data storage unit A step of calculating
Calculating a representative value of the difference for each predetermined position in the map data;
When the representative value of the difference exceeds a predetermined reference, the predetermined position in the map data is corrected using the representative value of the difference, and the corrected position data is stored in the map data storage unit When,
For each of the moving bodies, a new route portion and a route portion that has already been measured for the route specified by the time-series position data stored in the time-series position data storage unit are specified, and the new route portion Totaling the moving distance and the moving distance of the portion of the already measured route with different weights,
Implementing a process for giving a predetermined privilege to a holder of the moving body based on the moving distance counted for each moving body;
MAP data modification program to be run.

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