JP5904080B2 - Lane information data display system - Google Patents

Description

  The present invention relates to a lane information data display system for displaying lane information data such as average speed of automobiles obtained by analyzing probe data on digital road map data.

  In a vehicle such as an automobile equipped with a car navigation system equipped with GPS, traveling history information (probe data) including time information and position (latitude / longitude) information can be obtained as the vehicle travels. .

  Although such probe data itself is simply a combination of time and position, it is possible to know the traffic route of the vehicle by combining the probe data and position information of roads and intersections in the digital road map data. . Further, the speed at a certain point can be calculated from the travel distance and time, and further, the point estimated to be suddenly braked can be specified from the change (acceleration) of the speed.

  In addition, from the probe data of one vehicle, it is only possible to know the travel route of the vehicle, the speed or acceleration of a specific section, etc. However, if the probe data of many vehicles are collected and analyzed, It is also possible to grasp the traffic situation of Therefore, in recent years, automakers and the like have gathered the probe data and put into practical use a service that feeds back road traffic information such as the presence or absence of road congestion.

  Furthermore, by collecting and analyzing probe data accumulated by automakers, etc., it is possible to identify chronic traffic congestion on roads and dangerous places where many vehicles apply sudden braking. Change, change due to day of the week, change due to season or event).

For this reason, in recent years, based on probe data collected and analyzed from many cars, the danger point is identified and its cause is estimated, which is useful for preventing accidents and identifying traffic congestion points to facilitate traffic. Various utilization methods are being considered, such as formulating a road plan for the purpose, and analyzing the effects of road projects.
In the following Patent Documents 1 and 2, devices and programs for utilizing such probe data are proposed.

JP 2006-85511 A JP 2009-9443 A

  By the way, a large number of accumulated probe data are analyzed, and as shown in FIG. 6, for example, superimposed as digital road map data as lane information data of average speed, and the size of average speed is color-coded (in the figure, shade It is sufficient to display the straight lane information data 2a and 2b along the upper and lower lanes 1a and 1b on the roads other than the intersection when examining the places where traffic congestion occurs frequently. However, at an intersection where a right turn and a left turn are possible, the lane 1a is divided into a straight lane, a right turn lane, and a left turn lane, and the straight lane information data 2a, the right turn lane information data 3a, and the left turn lane, respectively. It is necessary to display the information data 4a.

  As a result, a maximum of a total of 12 lane information data is displayed at the intersection where roads from four directions intersect. For this reason, in the conventional lane information data display system, as shown in FIG. 6, the offset amounts from the road center of these three lane information data 2a, 3a, 4a are usually set to different values in advance. By doing so, the three lane information data 2a, 3a, 4a are displayed so as to be parallel to each other at a predetermined interval along the road.

  On the other hand, when lane information data color-coded to the average speed and digital road map data are overlapped to examine places where traffic congestion occurs frequently on roads and intersections, generally, the operator first reduces the display scale of the digital road map data. After confirming the place to be examined by visually checking the tendency in a wide range by reducing (for example, 1/20000), the above scale is switched to increase (for example, 1 / 5,000) and examined. The method of grasping detailed information on the place by enlarging the place to be taken is adopted.

  However, in the conventional lane information data display system, when the digital road map data and the lane information data are superimposed, the offset amount from the road center of the lane information data 2a, 3a, 4a is set to a constant value. When the three lane information data are displayed in parallel as shown in FIG. 7 (a) because they are fixed, if the scale is reduced as shown in FIG. 7 (b), 3 One lane information data overlaps and is displayed as one lane information data.

On the other hand, if the scale is further enlarged from the scale shown in FIG. 7A to enlarge the intersection portion, the lane information data located outside the three lane information data is displayed on the display screen. It will be outside and will not be visible.
As described above, in the conventional lane information data display system, when the scale is larger or smaller than a predetermined value, all the lane information data for each of the plurality of lanes can be individually confirmed. There was a problem that it could not be done.

  The present invention has been made in view of the above circumstances, and even when the display scale of the digital road map data is switched, a plurality of lane information data can always be displayed in parallel, and thus the lane information data It is an object of the present invention to provide a lane information data display system that facilitates examination based on the above.

In order to solve the above problems, the invention described in claim 1 is directed to digital road map data, lane information data obtained by analyzing probe data having time and position information, digital road map data, Overlapping lane information data based on each other's position information, and displaying the lane information data along the road of the corresponding digital road map data, and switching the display of the digital road map data to multiple scales In the lane information data display system provided with possible display means, the lane information data includes a plurality of lane information corresponding to the number of lanes for one road at a specific location including the vicinity of the intersection of the road. together with data, said display means, as the switch to large scale the scale, the plurality of The spacing of the lane information data with progressively smaller displays than before the switching, as the switch to Do scale small the scale, gradually wider function of displaying than previous interval the switch the lane information data of said plurality of It is characterized by having.

  Further, the invention according to claim 2 is the invention according to claim 1, wherein the lane information data is a plurality of displays in which the intervals of the plurality of lane information data are changed in a plurality of stages at the specific location. The display means has a plurality of scale ranges corresponding to the plurality of stages in advance and extracts the display data corresponding to the selected scale when the scale is switched. Then, the digital road map data of the selected scale is superimposed and displayed.

  Furthermore, the invention according to claim 3 is the invention according to claim 1 or 2, wherein the lane information data has at least an average travel speed of automobiles.

  According to the invention described in any one of claims 1 to 3, when the digital road map data and the lane information data obtained by analyzing the probe data are superimposed and displayed, the digital road map data When the scale of the display is enlarged and the display location is enlarged, the interval between the plurality of lane information data is displayed gradually narrower, so that a part of the lane information data does not deviate from the display screen.

  Conversely, when the scale of the display of the digital road map data is reduced to display a wide range, the intervals of the plurality of lane information data are gradually displayed as the scale is reduced. Therefore, these multiple lane information data can be prevented from overlapping and being displayed as one.

  As a result, even if the scale of the display of the digital road map data is switched, a plurality of lane information data can always be displayed in parallel, so that the examination based on the plurality of lane information data is facilitated.

  By the way, in the first aspect of the invention, the interval between the plurality of lane information data is gradually displayed as the scale is increased, and the interval between the plurality of lane information data is decreased as the scale is reduced. As a function of gradually displaying a wide range, for example, from the selected scale, an offset amount from the road center of each lane information data suitable for displaying a plurality of lane information data in parallel at the scale is calculated. It is also possible to adopt a function for displaying the image.

  However, in such a method for calculating the offset amount of a plurality of lane information data in real time with respect to the switching of the scale, for example, there is a calculation burden on the CPU of the computer constituting a part of the display means. There is a risk that a time lag will occur before display.

  In this regard, according to the second aspect of the present invention, the interval between the plurality of lane information data is changed in a plurality of stages at a specific location where a plurality of lane information data such as an intersection is displayed in parallel. In addition to preparing a plurality of display data, a plurality of scale ranges corresponding to each display data are set, and when the scale of the digital road map data is switched, the display corresponding to the scale is displayed. Since the data is extracted and displayed, it is possible to display a plurality of lane information data set at an optimal interval instantly for the switching of the scale.

It is a flowchart which shows the function of the display means in one Embodiment of the display system of lane information data based on this invention. It is a contrast table of the offset value of the lane information data set to the said display means, and a scale range. It is a schematic diagram which shows the state which selects the display data of the offset value corresponding to a reduced scale based on the comparison table | surface of FIG. FIG. 4 is a schematic diagram showing a selection state of display data when switching from the scale of FIG. 3 to a smaller scale. It is a figure which shows that several lane information data are always displayed in parallel, even if a reduced scale is switched. It is a figure which shows the display form of the conventional general lane information data. It is a figure which shows the state at the time of switching a scale to a small value in the display form of FIG.

Hereinafter, based on FIGS. 1-5, one Embodiment of the display system of the lane information data which concerns on this invention is described.
In this lane information data display system, the display means for displaying the digital road map data and the lane information data superimposed on each other is a storage device such as a RAM and a hard disk, an input / output control unit, etc. A well-known personal computer to which an input device such as a keyboard or a mouse via a monitor, a monitor that displays input / output data, a DVD or CD-ROM drive that records an execution program, and an output device such as a printer are connected, The storage device stores digital road map data, lane information data, and an execution program for superimposing these data on a monitor so as to be executed by the computer.

  Here, a commercially available general-purpose database and software can be used as the digital road map data, the lane information data, and the execution program thereof, and the execution program is as shown in FIG. 6 and FIG. The digital road map data and the lane information data are superimposed on the basis of the mutual position information and displayed on the monitor. In addition, the execution program can switch the scale for displaying the digital road map data in stages by an operation from the input device.

  Furthermore, the lane information data includes a plurality of lane information data corresponding to the number of lanes that go straight, turn left, and / or turn right with respect to one road at a location corresponding to a specific location including the vicinity of a road intersection in the digital road map data. Lane lane information data is stored. For a plurality of lane information data corresponding to these specific locations, as shown in the right column of FIGS. 3 and 4, a plurality of offset amounts from the center of the road are changed to a plurality of levels (four levels in the figure). There are prepared four display object (display data) files.

  In addition to the average travel speed on the road corresponding to the position information, the lane information data includes the average travel speed of the cars for 12 hours in the daytime, the average travel speed at the time of congestion, the average travel speed at the time of non-daytime congestion, Various lane data such as average travel time, 12-hour or 24-hour automobile traffic by small and large cars, and the total automobile traffic, etc. are included. By selecting the desired information, The amount can be displayed in different colors.

  On the other hand, in the execution program, as shown in FIG. 2, a scale table for displaying digital road map data and a comparison table for the four display objects of lane information data corresponding to the range are set in advance. The display object corresponding to the range of the scale of the display of the digital road map data is selected, and is set to be displayed on the monitor so as to be superimposed on the digital road map data.

Next, based on FIGS. 1-5, the effect of the display system of the lane information data which consists of the said structure is demonstrated.
First, the execution program is started by the computer, and the digital road map data and the lane information data are superimposed on the monitor based on each other's position information and displayed on the monitor. However, as shown in the comparison table of FIG. 2, the lane information data is not displayed when the display scale of the digital road map data is a wide area display such as 1/1000 or less.

  Next, when the operator switches the display scale of the digital road map data from the input means to, for example, the scale shown in FIG. 4, the execution program refers to the comparison table shown in FIG. 2 and corresponds to the scale. Select the display object (Kousaten-05m). Then, when the display object is the same as the display object at the scale before switching, the previous display object is superimposed and displayed on the monitor as it is even at the switched scale.

  Next, when the operator switches to the scale shown in FIG. 3, for example, in order to confirm the details of the displayed intersection at a scale larger than the scale shown in FIG. With reference to the comparison table shown in 2, a display object (Kousaten-02m) corresponding to the scale is selected. Then, the display object (Kousaten-05m) before switching is turned OFF, and the display object (Kousaten-02m) is superimposed on the switched scale digital road map data and displayed on the monitor.

  As described above, according to the lane information data display system configured as described above, when the digital road map data and the lane information data are superimposed and displayed, the display scale of the digital road map data is increased. When the display location is enlarged, the intervals between the plurality of lane information data are displayed gradually narrower, so that part of the lane information data does not deviate from the display screen.

  On the other hand, when the scale of the display of the digital road map data shown in FIG. 5A is reduced to display a wide range, as the scale is reduced, the plurality of lane information data are displayed. Since the intervals are gradually displayed, as shown in FIG. 5 (b), it is possible to prevent the plurality of lane information data from overlapping and being displayed as one.

  As a result, even if the display scale of the digital road map data is switched, a plurality of lane information data can always be displayed in parallel, so that the examination based on the lane information data is facilitated.

  In addition, as shown in the comparison table of FIG. 2, the intervals of the plurality of lane information data are set in a plurality of stages (this embodiment) as shown in the comparison table of FIG. In (4), a plurality of (four) display objects are prepared, and a plurality of (four steps) scale ranges corresponding to each display object are set. Since the display object corresponding to the scale is extracted and displayed when the scale of the digital road map data is switched, a plurality of lanes that are instantly set at an optimum interval for the switching of the scale Information data can be displayed.

Claims (1)

The digital road map data, the lane information data obtained by analyzing the probe data having time and position information, and the digital road map data and the lane information data are overlapped based on each other's position information, and In a lane information data display system comprising display means capable of displaying lane information data along the corresponding roads of the digital road map data and capable of switching the display of the digital road map data to a plurality of scales.
The lane information data includes a plurality of lane information data corresponding to the number of lanes for one road at a specific location including the vicinity of the intersection of the road,
Said display means, as the switching the scale on large scale, with the spacing of the lane information data of said plurality of with progressively smaller displays than before the switching, to switch to the Do scale small the scale And a lane information data display system having a function of displaying the intervals of the plurality of lane information data gradually wider than before the switching .