JP4627062B2 - Mobile terminal device and map data management method - Google Patents

Description

  The present invention relates to a map data management / display technique in a mobile terminal device such as a car navigation device.

As a conventional technique, there is a technique disclosed in Japanese Patent Application Laid-Open No. 2000-31175.
In the related art, the information processing device mounted on the moving body measures the current position of the moving body based on positioning information from a GPS (Global Positioning System) satellite and reflects the current position of the moving body on the map data and displays it. To do. When the mobile body travels at a position that is not a road in the map data, the travel locus of the mobile body is displayed as an additional road, and is stored in the storage device as additional road data.
JP 2000-3111175 A Japanese Patent Laid-Open No. 2002-71782 JP 2001-330455 A JP-A-9-243391

In the above prior art, since the current position of the moving body is measured based only on the positioning information from the GPS satellite, it is impossible to perform the positioning accurately, and the positioning result and the actual position of the moving body are not. A positioning error of several meters to several tens of meters occurs.
For this reason, even if the additional road is displayed based on the traveling locus of the moving body, the additional road is displayed at a position different from the actual road position, and accurate map data cannot be displayed.
In addition, since additional road data that does not reflect the actual road position is stored in the storage device, when the mobile object travels on the additional road again later, Nevertheless, on the map data, it is displayed that the vehicle is traveling on a position other than the additional road, and accurate navigation is not possible.

The present invention aims to solve the problems of the prior art as described above, and displays a new road that is not in the map data based on the movement trajectory of the moving object at an accurate position. One of the purposes is to update the contents of the map data so that a new road is displayed at an accurate position.
Furthermore, an object of the present invention is to select a travel route that is most suitable for travel from a plurality of travel routes based on past travel results of the mobile body, and to appropriately notify the selected travel route.

The mobile terminal device according to the present invention is
A mobile terminal device arranged on a mobile body and holding map data,
A map data storage unit for storing map data having a plurality of types of map component data indicating a plurality of types of map components including roads;
A positioning unit that measures the location of the moving body using the positioning information and the correction information for correcting the positioning information;
A mapping unit that maps the location of the moving object on map data based on the positioning result of the positioning unit;
According to the mapping result by the mapping unit, the moving locus of the moving body is specified on the map data, map component data at least partially overlapping the moving locus is detected as the moving locus overlapping map component data, and the detected moving locus overlapping map is detected. Map component data that determines the type of component data and that indicates a road that overlaps the movement track in the moving track overlap map component data when the moving track overlap map component data is not map component data indicating a road And a map data updating unit for updating the data.

  As described above, according to the present invention, since the location of the moving object can be measured with high accuracy using the positioning information and the correction information for correcting the positioning information, the moving locus of the moving object is accurately specified. For this reason, it is possible to perform an update in which a new road is added at an accurate road position along the movement locus of the moving body.

Embodiment 1 FIG.
FIG. 1 is a principle diagram showing a configuration of a communication system according to the present embodiment.
The mobile body 1 is, for example, a vehicle, and a mobile terminal device 10 is arranged.
The mobile terminal device 10 is, for example, a car navigation device and receives positioning information from four or more GPS satellites 2 and also receives correction information from the quasi-zenith satellite 3 and the location of the mobile body 1 based on the positioning information and the correction information. Measure the position with high accuracy.
The positioning information from the GPS satellite 2 is affected by the ionosphere and the troposphere delay before the radio wave reaches the ground. Therefore, positioning using only the positioning information often causes errors in the positioning results. . The correction information is information for correcting such an error, and is generated based on, for example, D (Differential) -GPS technology by electronic reference points arranged at 947 locations nationwide.
In addition, the mobile terminal device 10 has map data, reflects the location of the moving body 1 on the map data, and moves when the moving body 1 moves on a position that is not a road on the map data. Update to add road data along with. Then, the mobile terminal device 10 transmits an update content notification for notifying the update content to the map data management device 40 of the map data management center 4. The map data management center 4 is, for example, a map production company.

Next, the quasi-zenith satellite 3 will be described.
FIG. 13 is a diagram for explaining the locus of a quasi-zenith satellite. In FIG. 13, reference numeral 300 denotes a quasi-zenith satellite.
The quasi-zenith satellite 300 orbits once a day according to the rotation of the earth with an inclination angle of about 45 degrees from the equatorial plane and an orbit with an eccentricity of about 0.099, for example. The inclination angle from the equator plane may be arbitrarily set depending on the design. In addition, three quasi-zenith satellites 300 are arranged so as to be 120 degrees apart at the ascending intersection eclipse (intersection with the equatorial plane).
FIG. 14 is a diagram for explaining the locus of the quasi-zenith satellite orbit projected onto the ground surface.
FIG. 14 shows the locus of the quasi-zenith satellite 300 in FIG. 13 when the ground is fixed. As shown in FIG. 14, the quasi-zenith satellite 300 orbits so as to draw a “figure 8” having an intersection on the equator. The three quasi-zenith satellites 300 are located above Japan without a break so that the orbital planes are different but change every 8 hours. When the region is considered in Japan, there is always a quasi-zenith satellite 300 with an elevation angle of 70 degrees or more. Because it is located above Japan without a break, there is always a quasi-zenith satellite 300 with an elevation angle of 70 degrees or more, and when the receiver receives radio waves from the quasi-zenith satellite 300 on the ground, the radio waves can be blocked even in the valleys of the building. Less is.

When the mobile terminal device obtains correction information, the mobile terminal device notifies the electronic reference point of the current position of the moving body and requests transmission of the correction information, and the electronic reference point is notified of the current position of the moving body. It is a normal procedure to transmit correction information corresponding to the mobile terminal device. In this case, since bidirectional wireless communication is required between the mobile terminal device and the electronic reference point, a communication band must be secured in both directions, and the mobile terminal device and the electronic reference point If there is an obstacle such as a building between them, the mobile terminal device cannot communicate with the electronic reference point and cannot acquire correction information.
In this regard, when the correction information is distributed from the quasi-zenith satellite 3, there is no need to secure a bidirectional communication band, and there is no obstacle between the mobile terminal device and the quasi-zenith satellite 3, and the mobile terminal device Can reliably acquire correction information. When the mobile terminal apparatus receives correction information from the quasi-zenith satellite in this way, the mobile terminal apparatus can determine the location of the moving body with high accuracy of an error half meter or less.

Next, a configuration example of the mobile terminal apparatus 10 will be described with reference to FIG.
The satellite receiving antenna 101 is an antenna for realizing communication with the GPS satellite 2 and the quasi-zenith satellite 3.
The general communication antenna 102 is an antenna for realizing communication with the map data management device 40 and other communication devices.
The satellite receiver 103 receives positioning information from the GPS satellite 2 and receives correction information from the quasi-zenith satellite 3.
The positioning unit 104 measures the location of the moving body 1 using the positioning information from the GPS satellite 2 and the correction information from the quasi-zenith satellite 3.
The mapping unit 105 maps the location of the moving body 1 measured by the positioning unit 104 on the map data.
The display unit 106 displays map data or the like in which the location of the moving object is mapped by the mapping unit 105 on a display display.
The communication unit 107 communicates with the map data management device 40 and other communication devices. For example, the communication unit 107 transmits the update content communication information to the map data management device 40.
The map data storage unit 108 stores map data. In the present embodiment, it is assumed that the map data storage unit 108 can rewrite the map data. The map data stored in the map data storage unit 108 is composed of a plurality of types of map component data. Here, the map component data is data indicating map components such as roads, railways, rivers, bridges, and buildings.
The map data update unit 109 performs an update to add a road along the movement locus of the moving object when the moving object 1 moves on a position that is not a road on the map data.
The input unit 110 receives various instructions from the user of the mobile terminal device 10.

Although not shown, the mobile terminal device 10 can be realized by a computer having a CPU such as a microprocessor, a recording unit such as a semiconductor memory or a magnetic disk, and a communication unit. In the recording means, a program for realizing the function of each component included in the mobile terminal device 10 is recorded. The CPU reads these programs to control the operation of the mobile terminal device 10, and Function can be realized.
These programs can also be recorded on a recording medium that can be read by a computer. Furthermore, it is also possible to transmit these programs via a communication network and install these programs at the transmission destination.

Next, the operation of mobile terminal apparatus 10 according to the present embodiment will be outlined.
FIG. 3 shows an example of map data displayed on the display of the mobile terminal device 10.
In FIG. 3, there is a ◯ electric machine Δ factory 92 between the road 91 and the road 93, and there is no road connecting the road 91 and the road 93.
In this state, as shown in FIG. 4, when the moving body 1 moves from the road 91 to the road 93 along the locus shown by 94, the mobile terminal device 10 causes the road 91 and the road along the moving locus 94 of the moving body. 93, it is determined that a new road exists, the road data is updated in correspondence with the movement locus 94, and the new road is displayed on the display.
As a result, the map data displayed on the display is as shown in FIG. 5, and a new road 95 connecting the road 91 and the road 93 is additionally displayed along the movement locus 94 of the moving body.
Further, the XX electric machine △ factory 92 on which the new road 95 has passed is divided into two closed-loop elements 92a and 92b along the new road 95, and the previous attribute XX electric machine △ factory. Is updated to take over and is also displayed on the display.

  As described above, since the mobile terminal device can perform high-accuracy positioning with a positioning error of several tens of centimeters or less by receiving positioning information from the quasi-zenith satellite, the moving trajectory of the moving object can be accurately specified. As a result, a new road can be added at an accurate road position. In addition, when the moving body passes through the new road later, the new road can be displayed at an accurate position on the map data, and the location of the moving body can be accurately measured. It is possible to display at an accurate position that the moving body is traveling on a new road.

Next, the procedure of the map data update process will be described with reference to FIG.
First, in step S <b> 11, the map data update unit 109 acquires map data and movement trajectory information from the mapping unit 105. The map data to be acquired is the map data displayed by the display unit 106. In addition, the movement trajectory information indicates the movement trajectory of the moving object mapped on the map data by the mapping unit 105.
Next, in step S12, the map data update unit 109 detects map component data that overlaps the movement locus. In the example of FIG. 4, an xx electrical machine factory 92 that overlaps the movement locus 94 of the moving object is detected.
Next, in step S13, the map data update unit 109 determines the type of the detected map component data (moving trajectory overlap map component data). Specifically, it is determined whether the moving trajectory overlapping map component data is road data or data other than road data (step S14).
If it is road data, since it is not necessary to add new road data in step S15, the process is terminated.
On the other hand, if it is not road data, the map data stored in the map data storage unit 108 is updated so that the portion of the movement trajectory overlapping map component data that overlaps the movement trajectory is road data. In the example of FIG. 4, the map data is updated so that the portion overlapping the movement locus 94 in the ◯ × electrical Δfactory 92 is a new road 95.
Next, in step S16, the map data update unit 109 updates the map data so as to divide the movement trajectory overlapping map component data along the movement trajectory. In the example of FIG. 4, the update is performed to divide the xx electric machine Δ factory 92 into elements 92a and 92b.

  As a result of the above update, a new road is displayed on the display at an accurate road position.

  In the flowchart of FIG. 6, the map data is unconditionally updated when the moving track overlapping map component data overlapping the moving track is not road data. However, the moving speed of the moving body is equal to or higher than a predetermined speed. The map data may be updated only when Even if the moving object is off the road, it may be just parked in the parking lot of the shopping center and exit from the exit at a different position from the entrance, so the average from the time of leaving the road until joining When the moving speed is a predetermined speed (for example, 15 km / h) or less, it may be determined that the road is not a new road and the map data may not be updated.

  In addition, when the map data is updated by the above procedure, the map data update unit 109 creates update content notification information for notifying the update content, and manages the map data via the communication unit 107 and the general communication antenna 102. The update content notification information may be transmitted to the map data management device 40 of the center 4. The map data management center 4 can manage map data reflecting the latest road conditions by receiving update content notification information from a plurality of mobile terminal devices.

  Furthermore, the mobile terminal device may transmit update content notification information to mobile terminal devices of other mobile units existing in the vicinity, and share the latest road information between the mobile terminal devices in the vicinity. In this case, the mobile terminal device that has received the update content notification information from another mobile terminal device further propagates the update content notification information in order by transmitting the received update content notification information to the neighboring mobile terminal device. It is also possible to go.

  In the above description, it is assumed that the map data stored in the map data storage unit can be rewritten. However, the map data may not be rewritten. In this case, when the map data update unit stores the update contents and displays the map data of the updated area, the map data stored in the map data storage unit is stored in the map data update unit. The updated contents are displayed in a superimposed manner.

  Further, the quasi-zenith satellite can also function as a GPS satellite, and positioning information may be distributed together with other GPS satellites. In this case, the mobile terminal device measures the location of the moving body based on positioning information from three or more GPS satellites and quasi-zenith satellites and correction information from the quasi-zenith satellites.

In addition, since the mobile terminal device can perform high-accuracy positioning with an error of 10 cm or less by receiving correction information from the quasi-zenith satellite, the road width of the road (how many lanes on one side), the configuration near the intersection ( It is also possible to recognize that there is a right turn lane).
For example, when a moving body travels on a road whose map data does not clearly show the number of lanes on one side, if the road travels at a position that is shifted to the right or left by several meters from the last traveled position, The terminal device can recognize a difference from the previous travel position, and if the mobile body travels the road a plurality of times, the mobile terminal device can estimate how many lanes the road is. Thereby, when displaying the said road on a display display, additional information, such as how many lanes a road is, can also be displayed.
In addition, when the travel position when the mobile body makes a right turn at a certain intersection is different from the travel position when going straight, that is, when traveling right several meters when making a right turn, the mobile terminal The apparatus recognizes this difference in travel position and can estimate that a right turn lane exists near the intersection. Thereby, additional information that a right turn lane exists in the vicinity of the intersection can also be displayed.

It is also possible to record in the map data a closed loop constituted by a trajectory that has passed other than the road as a place where the vehicle can travel outside the road. For example, it is possible to record that the parking lot range can be traveled using a trajectory that the vehicle travels after entering a parking lot such as a shopping center.
In addition, by applying this, when the business vehicle travels through the places where the vehicle can travel within the factory or facility, the range in which the vehicle can travel within the factory or facility can be added to the map data and recorded.

  As described above, according to the present embodiment, it is possible to accurately specify the movement trajectory of the moving object by performing high-precision positioning using the correction information from the quasi-zenith satellite, and the position where the moving object is not a road is determined. Even when the vehicle passes, a new road can be reflected in the map data at an accurate road position.

Embodiment 2. FIG.
In the present embodiment, a case will be described in which when there are a plurality of travel routes in a specific section, the expected travel time is obtained for each of the plurality of travel routes, and the travel route with the shortest predicted travel time is selected and notified. .

For example, a vehicle going straight on a road may enter a right-turn car line near an intersection, and therefore may not move until the previous vehicle (right-turn car) turns right. In such a case, if a lane change is made in order to get out of the line of a right turn vehicle, a dangerous situation such as a contact accident may occur.
For this reason, in the present embodiment, a mechanism for notifying the driver of the travel route that can be traveled in the shortest time based on the learning effect based on the past traveling experience, that is, necessary for traveling when the vehicle travels on a certain road. A mechanism for storing the travel time and notifying the driver of the travel route with the shortest travel time when traveling on the road again will be described.

FIG. 7 shows an example of a road targeted in the present embodiment, and shows a road having a plurality of lanes as a plurality of travel routes in a section from point A to point B. It should be noted that the section in which the travel route (lane) is selected, that is, the section from point A to point B is referred to as a route selection target section in the example of FIG.
In this embodiment as well, it is assumed that high-precision positioning with an error number of 10 cm or less can be performed by distributing correction information from the quasi-zenith satellite, and as a result, each of a plurality of lanes can be accurately identified. .

FIG. 8 is a block diagram showing a configuration example of the mobile terminal apparatus 10 according to the present embodiment.
8, 101 to 108 and 110 are the same as those shown in FIG.
Similarly to the first embodiment, the satellite receiver 103 receives the positioning information from the GPS satellite 2 and the correction information from the quasi-zenith satellite 3, and the positioning unit 104 moves based on the positioning information and the correction information. The location of the body 1 is measured with high accuracy. When the quasi-zenith satellite also distributes positioning information, the positioning information from the quasi-zenith satellite may be used.
In addition, the display unit 106 performs display for notifying the travel route (lane) selected by the travel route selection unit 114.

The travel time measuring unit 111 measures the travel time for each travel route (lane) every time the mobile body travels through the route selection target section.
The predicted traffic time calculation unit 112 calculates the predicted traffic time for each travel route (lane) based on the traffic time measured by the traffic time measurement unit 111. The expected travel time is a travel time expected to be required when the moving body travels a certain travel route (lane), and is, for example, an average time of a plurality of travel times measured by the travel time measurement unit 111.
The predicted travel time storage unit 113 stores the predicted travel time for each travel route (lane) calculated by the predicted travel time calculation unit 112.
The travel route selection unit 114 is configured to select a travel route (lane that has the shortest expected travel time from a plurality of travel routes (lanes) when the mobile body is about to travel through the route selection target section or while traveling through the route selection target section. ) Is selected.
The voice output unit 115 outputs voice guidance for notifying the moving route (lane) selected by the moving route selecting unit 114 by voice.

Although not shown, the mobile terminal device 10 can be realized by a computer having a CPU such as a microprocessor, a recording unit such as a semiconductor memory or a magnetic disk, and a communication unit. In the recording means, a program for realizing the function of each component included in the mobile terminal device 10 is recorded. The CPU reads these programs to control the operation of the mobile terminal device 10, and Function can be realized.
These programs can also be recorded on a recording medium that can be read by a computer. Furthermore, it is also possible to transmit these programs via a communication network and install these programs at the transmission destination.

As described above, also in the present embodiment, the mobile terminal apparatus 10 can perform high-precision positioning with an error number of 10 cm or less based on the positioning information from the GPS satellite 2 and the correction information from the quasi-zenith satellite 3. For this reason, when the moving body is passing the route selection target section, it can be determined which of the plurality of moving routes (lanes) the moving route (lane) is passing through, and the transit time measuring unit 111 can measure the passing time for each moving route (lane) every time the moving body passes through the route selection target section.
As a result, based on the travel time measured for each travel route (lane) by the travel time measurement unit 111, the predicted travel time calculation unit 112 can calculate the expected travel time for each travel route (lane).

FIG. 9 shows an example of the stored contents stored in the expected travel time storage unit 113.
FIG. 9 shows an example in which the estimated traffic time from point A to point B shown in FIG. 7 is stored for each lane divided into time zones. Further, the expected traffic time of each lane is the average time of the traffic time measured by the traffic time measuring unit 111.

The moving route selection unit 114 sets the estimated travel time of the time zone corresponding to the current time when the moving object approaches the point A shown in FIG. 7 or in the section between the point A and the point B. Refer to the lane and select the lane with the shortest expected travel time.
And the display part 106 displays the lane selected by the movement route selection part 114 on a display display like the example shown in FIG. In FIG. 10, since the current time is 10:34, the expected traffic time is shorter in the left lane. Therefore, the left lane is selected, and guidance for instructing to travel in the left lane is displayed on the display.
At the same time, voice guidance for instructing to travel in the left lane may be output from the voice output unit 115.

Next, a procedure for selecting a travel route (lane) will be described with reference to the flowchart of FIG.
First, in step S <b> 21, the movement route selection unit 114 acquires location position information indicating the location of the moving object from the mapping unit 105.
Next, in step S22, it is determined whether the location of the moving object is within the route selection execution area. The route selection execution area is an area where the moving route selection process should be started, and is an area from a predetermined position before the start point of the route selection target section to a predetermined position before the end point. In the example illustrated in FIG. 7, for example, an area from 100 m before point A to 100 m before point B is set as a route selection execution area. Note that the moving route selection unit 114 holds the position information of the route selection execution area, and determines whether the location of the moving object is within the route selection execution area by comparing with the location information of the moving object. To do.
If the location of the moving body is outside the route selection execution area, the moving route (lane) is not selected, and the process ends.
On the other hand, if the location of the moving body is within the route selection execution area, in step S23, the stored content of the predicted travel time storage unit 113 is referred to, and the travel route with the shortest predicted travel time for the target route selection target section. Select (lane). Further, when the predicted travel time storage unit 113 stores the predicted travel time for each time zone, the travel route (lane) having the shortest predicted travel time is selected for the time zone corresponding to the current time.
Next, in step S24, the selected travel route (lane) is notified to the display unit 106 and the voice output unit 115, and guidance for notifying the selected travel route (lane) from the display unit 106 and the voice output unit 115 is output. .

  Thus, according to the present embodiment, it is possible to measure the travel time for each travel route by performing high-precision positioning using correction information from the quasi-zenith satellite, and based on the travel time for each travel route. It is possible to select a travel route that is considered to be able to travel the earliest using the estimated travel time.

  The mobile terminal device transmits the travel route notification information for notifying the selected travel route to the mobile terminal devices of other mobile units existing in the vicinity so that the mobile route notification information is shared between the neighboring mobile terminal devices. It may be. In this case, the mobile terminal device that has received the travel route notification information from another mobile terminal device further propagates the travel route notification information in order by transmitting the received travel route notification information to neighboring mobile terminal devices. It is also possible to go.

  In addition, the mobile terminal device transmits the expected traffic time notification information for notifying the predicted traffic time stored in the predicted traffic time storage unit to the mobile terminal device of another mobile body existing in the vicinity, and between the mobile terminal devices in the vicinity May share the expected transit time notification information. In this case, the mobile terminal device that has received the expected transit time notification information from another mobile terminal device further transmits the received expected transit time notification information to neighboring mobile terminal devices, thereby sequentially changing the expected transit time notification information. It is also possible to propagate.

  In the above description, each lane included in the same road is described as an example of the travel route. For example, each road when there are a plurality of roads from point A to point B as shown in FIG. The travel route may be selected and the travel route may be selected for the plurality of roads based on the expected travel time.

1 is a diagram illustrating a configuration example of a communication system according to Embodiment 1. FIG. FIG. 2 shows a configuration example of a mobile terminal apparatus according to Embodiment 1. The figure which shows the example of a display of map data. The figure which shows the example of a display of map data. The figure which shows the example of a display of map data. The flowchart figure which shows the procedure of the map data update process which concerns on Embodiment 1. FIG. The figure which shows the example of the road made into the object of the mobile terminal device which concerns on Embodiment 2. FIG. The figure which shows the structural example of the mobile terminal apparatus which concerns on Embodiment 2. FIG. The figure which shows the example of the memory content of an estimated passing time memory | storage part. The figure which shows the example of a display guidance which notifies the selected movement route. FIG. 9 is a flowchart showing a procedure of moving route selection processing according to the second embodiment. The figure which shows the example of the area where several moving routes exist. The figure explaining a quasi-zenith satellite. The figure explaining a quasi-zenith satellite.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Mobile body, 2 GPS satellite, 3 Quasi-zenith satellite, 4 Map data management center, 10 Mobile terminal device, 40 Map data management device, 101 Satellite reception antenna, 102 General communication antenna, 103 Satellite reception part, 104 Positioning part , 105 Mapping unit, 106 Display unit, 107 Communication unit, 108 Map data storage unit, 109 Map data update unit, 110 Input unit, 111 Traffic time measurement unit, 112 Expected traffic time calculation unit, 113 Expected traffic time storage unit, 114 Travel route selection unit, 115 voice output unit.

Claims (9)

A mobile terminal device arranged on a mobile body and holding map data,
A map data storage unit for storing map data having a plurality of types of map component data indicating a plurality of types of map components including roads;
A positioning unit that measures the location of the moving object with a positioning error of 0.5 meters or less using the positioning information and the correction information for correcting the positioning information;
A mapping unit that maps the location of a moving body measured with an accuracy of a positioning error of 0.5 m or less on map data based on the positioning result of the positioning unit;
In accordance with the mapping result by the mapping unit, the movement locus of the location of the moving body measured with an accuracy of a positioning error of 0.5 meters or less is specified on the map data, and the map component data at least partially overlapping the movement locus is moved. It is detected as trajectory overlap map component data, and the type of detected travel trajectory overlap map component data is determined. If the trajectory overlap map component data is not map component data indicating a road, the travel trajectory overlap map component data the portion overlapping with the movement locus of the have a map data updating section for updating the map component data indicating a road,
The positioning unit is
A mobile terminal device that measures a location of a moving body using correction information distributed from a quasi-zenith satellite . The mobile terminal device further includes:
A satellite receiving antenna for receiving positioning information and correction information from the satellite;
The map data update unit
The mobile terminal apparatus according to claim 1, wherein a moving locus of the satellite receiving antenna is specified on map data as a moving locus of a moving body according to a mapping result by the mapping unit. The map data update unit
2. The map component data indicating a road is updated to a portion that overlaps the movement track in the moving track overlapping map component data when the moving speed of the moving body is equal to or higher than a predetermined speed. Mobile terminal equipment. The mobile terminal device further includes:
The mobile terminal according to claim 1, further comprising a display unit that displays map data including the updated map component data when the map component data is updated by the map data update unit. apparatus. The mobile terminal device further includes:
The apparatus according to claim 1, further comprising a communication unit that transmits update content notification information for notifying update content to an external device when the map data update unit updates the map component data. The mobile terminal device described. The communication unit is
6. The mobile terminal apparatus according to claim 5 , wherein the update content notification information is transmitted to another mobile terminal apparatus arranged in another mobile body. The communication unit is
6. The mobile terminal apparatus according to claim 5 , wherein the update content notification information is transmitted to a map data management apparatus that manages map data. A map data management method for managing map data in a mobile body having map data having a plurality of types of map component data indicating a plurality of types of map components including roads,
A positioning step of positioning the location of the moving object with a positioning error of 0.5 meters or less using the positioning information and the correction information for correcting the positioning information;
A mapping step for mapping the location of the moving body measured with an accuracy of a positioning error of 0.5 meters or less on the map data based on the positioning result of the positioning step;
In accordance with the mapping result in the mapping step, the movement locus of the location of the moving body measured with an accuracy of a positioning error of 0.5 m or less is specified on the map data, and the map component data at least partially overlapping the movement locus is moved. It is detected as trajectory overlap map component data, and the type of detected travel trajectory overlap map component data is determined. If the trajectory overlap map component data is not map component data indicating a road, the travel trajectory overlap map component data the portion overlapping with the movement locus of the have a map data updating step of updating the map component data indicating a road,
The positioning step includes
A map data management method characterized in that the location of a moving object is measured using correction information distributed from a quasi-zenith satellite . It is located on a mobile unit and has map data. It receives positioning information from four or more GPS satellites and receives correction information from the quasi-zenith satellite, and determines the location of the mobile unit based on the positioning information and the correction information. The position is measured with high accuracy less than an error half meter, and the location of the moving object is reflected on the map data. When the moving object moves on a position that is not a road on the map data, the road data follows the movement trajectory. Is a mobile terminal device that transmits an update content notification to the map data management device of the map data management center.
A satellite receiving antenna which is an antenna for realizing communication with a GPS satellite and a quasi-zenith satellite;
A general communication antenna that is an antenna for realizing communication with a communication device;
A satellite receiver that receives positioning information from a GPS satellite and receives correction information from a quasi-zenith satellite;
A positioning unit for positioning the location of the moving object using the positioning information from the GPS satellite and the correction information from the quasi-zenith satellite;
A mapping unit that maps the location of the moving body measured by the positioning unit on map data;
A display unit that displays map data on which a location of the moving object is mapped by the mapping unit on a display;
A communication unit that communicates with the communication device and transmits the update content communication information to the map data management device;
A map data storage unit storing map data composed of a plurality of types of map component data, which is data indicating map components, and capable of rewriting the map data;
A map data update unit that performs an update to add a road along the movement locus of the moving object when the moving object moves on a position that is not a road on the map data;
An input unit for receiving various instructions from a user of the mobile terminal device;
The map data update unit obtains, from the mapping unit, the map data displayed on the display unit and the movement track information indicating the movement track of the moving body mapped on the map data by the mapping unit. , Detecting the map component data that overlaps the movement trajectory, and determining whether the detected movement component duplication map component data, which is the map component data, is road data or data other than road data, and is road data In this case, the process is terminated without adding new road data. On the other hand, if the road data is not used, the map is so arranged that the portion of the moving track overlapping map component data that overlaps the moving track is used as the road data. Update the map data stored in the data storage unit,
There is a non-road map component between the first road and the second road, there is no road connecting the first road and the second road, and there is a moving object from the first road. When moving to the second road, the map data updating unit determines that a new road exists between the first road and the second road along the movement locus of the moving body, and the map is not a road. The update is performed by adding road data so as to correspond to the movement trajectory so that the portion overlapping the movement trajectory of the constituent elements becomes a new road, and the display unit displays map data displayed on the display display as the mobile data. A new road connecting the first road and the second road along the movement trajectory is additionally displayed on the display.
The mobile terminal device accurately determines the movement locus of the moving object by performing high-accuracy positioning with a positioning error of half a meter or less by receiving positioning information from the quasi-zenith satellite, and the new road is accurately When the moving object passes through the new road later, the new road is displayed at the correct position on the map data and the location of the moving object is accurately measured. A mobile terminal device that displays at a precise position that a body is passing a new road.

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