JPH11265392A - Constant management device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily, understandably and quickly perform display and retrieval of road map information and a constant and preparation of the constant by displaying only the road information of a specified data kind on a map display screen from the information of a storage means and retrieving specified node and link when the conditions of the node and the link are specified on an information input screen and an instruction of retrieval is issued. SOLUTION: A nationwide digital road map data base 20 stores node and link information as numerical data, while a map information read processing part 13 reads the data base 20 and displays a road map on a map display screen 112. A screen operation main menu 111 specifies the data kind of the data base 20 displayed on the map display screen 112 and the mode of an information input screen 113. On the screen 113, in the case of specifying node retrieval and specifying a node number or the like for instance, a symbol for indicating the node is displayed at a pertinent position on the map display screen 112.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises a map display screen for displaying a road map and an information input screen for inputting information necessary for creating various constants. In addition, the present invention relates to a constant management device that can easily create, set, search, and delete constants that require information such as node numbers and coordinates, and can visually confirm them.

[0002]

2. Description of the Related Art Information of a nationwide digital road map database is road map information used for displaying information such as traffic congestion in a traffic control center or a car navigation system. As shown in FIG. It is composed of a set of files, and contains node information, link information, etc. for each file in units of secondary mesh. In the figure, reference numeral 1 denotes a nationwide digital road map database. M1 to MN
Indicates a file in units of a secondary mesh, and 1D indicates information contained in each mesh. FIG. 9 hierarchically shows node information and link information of the national digital road map database shown in FIG. 8, and maps used in the traffic control center and the car navigation system. In FIG. 9, reference numeral 2a denotes a map for displaying information such as traffic congestion in a traffic control center or a car navigation system. 2b corresponds to the node information of the nationwide digital road map database N1 to N9 and the link information of the nationwide digital road map database L1 to L8, and represents the map of 2a by the relationship indicated by these information. Here, a node is a node on a road network representation such as an intersection or a dead end. The node information includes information such as a node number, normalized coordinates in a mesh, a number of a node connected to the node, and a connection angle. The mesh refers to a road map divided into meshes for each section. A link is a line segment connecting nodes on a road network representation, that is, a road. A link is represented by a start node number and an end node number of the link. For example, in the case of link L1 on 2b in FIG. 9, the start node number is N1 and the end node number is N3. The link information includes route information indicating a national road, a prefectural road, etc. to which the link belongs, link length, interpolation point information indicating coordinates between links, and the like. As described above, when displaying map information in a traffic control center or a car navigation system, a map screen is created based on digital information in a map database, and information such as traffic congestion is displayed on the created map.

With the recent development of traffic control systems, it has become necessary for traffic control centers to collect and provide appropriate traffic information. In car navigation systems, more accurate information display is required. Is needed. For this reason, constants that require information in constructing these traffic control-related systems, such as information on the installation position of detectors that detect the size, speed, number of vehicles passing, information on the installation position of traffic lights, intersections, etc. Although it includes position information and the like, accurate information such as node numbers and coordinates is required to accurately display them on a nationwide digital road map.

[0004]

However, sensor information, traffic light information, intersection information, and the like have many types and number of information.
It took a long time to create data from the national digital road map database, and the confirmation work was difficult. Also,
In the maintenance and management, when changing the constants, it was difficult to check the data with the paper map, and it was not easy to change or check the data.

The present invention solves such a conventional problem. In the creation and maintenance of a number of constants related to road map information, the present invention uses a map display screen to display information from a national digital road map database. An object of the present invention is to provide a device that can display and search for road map information and constants and create constants easily and quickly by displaying map information and constant information for each type.

[0006]

According to a first aspect of the present invention, there is provided a constant management apparatus for reading data from a nationwide digital road map database, a storage unit for storing digital information for each data type, and a storage unit for storing the digital information. By displaying only the road map information of the specified data type on the map display screen from the existing information, it is possible to display only the necessary information on the screen, and specify the node and link conditions on the information input screen Means for searching for a specified node or link by issuing a search instruction, and means for displaying the searched information in different colors on a map display screen. The data can be checked visually.

A constant management device according to a second aspect of the present invention searches for node data or link data in a nationwide digital road map database by designating a node or link on a map display screen and issuing a search instruction. In the case of node search, numerical data such as mesh number, node number, coordinates, connection node information, etc.In the case of link search, numerical data such as mesh number, start node number, end node number, road type, link length etc. By means of the display, the relation between the contents of the numerical data of the information of the national digital road map database and the position displayed on the map can be easily confirmed.

The constant management device according to the third aspect of the present invention specifies the type of constant to be created on the information input screen, and sets an arbitrary point specified on the map display screen as the coordinate of necessary information, thereby providing accurate information. It is possible to set the position information of constants, and to input the detailed contents such as the management number on the information input screen and issue the setting instruction. It is possible to create a constant by associating with the detailed contents.

A constant management device according to a fourth aspect of the present invention searches for the specified information by designating the type of constant and then inputting a management number and issuing a search instruction, and displays detailed contents on an information input screen. By displaying, you can visually check the position and detailed contents of the specified information on the map, and you can easily create constants by changing and setting the displayed constants. is there.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 Hereinafter, Embodiment 1 of the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing Embodiment 1 of a constant management device for realizing the present invention. In the figure, 10 is a constant management device, 20 is a nationwide digital road map database, 11 is a screen, 11
1 is a screen operation main menu, 112 is a map display screen,
113 is an information input screen, 114 is a map operation unit, 13 is a map reading processing unit, 14 is an information search and display processing unit, 15
Is a constant file creation processing unit, and 21A to 21C are constant files. The constant management device 10 reads information from the nationwide digital road map database 20, displays the information on the screen according to instructions from the operator, and creates various constant files 21. The nationwide digital road map database 20 stores, for example, node information such as N1 to N9 of 1b and link information such as L1 to L8 in FIG. 9 as numerical data.

The constant management device 10 includes a screen 11 operated by an operator and various processing units.
Include a screen operation main menu 111, a map display screen 112 for displaying a road map, an information input screen 113 for inputting information necessary for creating various constants, and a scrolling of a map on the map display screen 112. A map information read processing unit 13 configured to read the national digital road map database 20 and display a road map on the map display screen 112, and to be designated from the map display screen 112 or the information input screen 113. An information search and display processing unit 14 for searching and displaying the input information, and a constant file creation processing unit 15 for creating various constant files 21 from information set on the information input screen 113 are provided. A constant file is a file that stores information required by the traffic control system as numerical data.For example, in the case of a constant file of vehicle sensor information, coordinates, sensor types, management numbers, threshold values specific to the sensors are used. There is information such as.

In the screen display section 11, the screen operation main menu 111 displays the termination of the constant management device, the designation of redisplay, and the data type of the national digital road map database 20 displayed on the map display screen 112, for example, Specification of road nodes, basic road links, all road nodes, all road links, water system data, administrative boundary position data, railway data, facility and other position data, facility and other shape data, place and other display position data, and information input screen 113 , Such as searching for nodes or links, setting constants, and the like. The map operation unit 114 moves the screen, such as scrolling the map display screen, and specifies the scale. The map display screen 112 displays the location specified by the map operation unit, and the information input screen 113 searches the data of the national digital road map database according to the mode specified by the screen operation main menu 111, and displays the constant file. Display one of the creation screens.

The information retrieval and display processing unit 14 holds the scale of the map displayed on the map display screen 112 and the coordinates of the origin, and the coordinates of the point clicked on the map display screen 112 are determined by the event structure. The coordinates of the point clicked from the body are detected and calculated from the scale of the map and the coordinates of the origin. Here, the event structure is a structure in which, by pressing a mouse button or a key on a keyboard, the event is taken as a message and information is taken in for each event type.

FIG. 2 is an example of a screen when a node search is performed by designating a node number in the national digital road map database 20. In the figure, 51 is an example of a map display screen, 52 is an example of an information input screen, 53 is an example of a map operation unit,
Reference numeral 54 denotes an example in which a node search is designated, and reference numeral 55 denotes an example in which searched nodes are displayed on the map display screen 51. This screen is displayed when data search of the national digital road map database 20 is specified on the screen operation main menu 111 and node search is specified on the information input screen 113. The information input screen changes by designating the node search as in 54. In the case of a node search, information is searched for by specifying a mesh number and a node number on the information input screen 52, and specifying the search.
Displays information such as coordinates and connection nodes on the map display screen 5
A symbol 55 indicating a node is displayed at the corresponding position of No. 1. On the information input screen 52, when a search is performed by inputting the basic road node data as the node number, a search is performed from the basic road node data. Search from road node data. Here, the basic road data includes data of a basic road network necessary for road management and the like, for example, roads where cars pass each other, and the entire road data includes an entire road network including narrower roads. Data, for example, roads through which cars can pass.

FIG. 3 is an example of a screen when a link search is performed by designating a link number in the national digital road map database. In the figure, 51 is an example of a map display screen,
52 is an example of an information input screen, 53 is an example of a map operation unit, 54
Is an example in which a link search is designated, and 56 is an example in which the searched link is displayed on the map display screen 51. This screen is displayed when data search of the national digital road map database 20 is specified on the screen operation main menu 111 and link search is specified on the information input screen 113. By designating the link search as indicated by 54, the information input screen changes. In the case of a link search, a mesh number on the information input screen 52, a node number 1 and a node number 2 are specified, and information is searched for by specifying a search, and information such as a road type and a link length is displayed on the information input screen 52. Is displayed,
The corresponding link 56 on the map display screen 51 is displayed. Node number 1 or node number 2 on the information input screen 52
Then, when the search is performed by inputting the basic road node data, the search is performed from the basic road link data. When the search is performed by inputting the all road node data, the search is performed from the all road link data. When only one mesh number and one node number are specified on the information input screen 52 and the search is performed, all the links connected to the specified node are displayed on the map display screen 51.

Embodiment 2 Next, a second embodiment of the present invention will be described in detail with reference to the drawings. FIG. 4 is an example of a screen when a node search of the national digital road map database 20 is performed by specifying a node on the map. In the figure, 51 is an example of a map display screen, 52 is an example of an information input screen, 53 is an example of a map operation unit, 54 is an example in which node search is specified, and 57 is a node of the node specified in the map display screen 51. It is an example. Screen operation main menu 111
By specifying the data search of the national digital road map database and specifying the node 57 on the map display screen 51, the data searched on the information input screen 52, for example, the mesh number, the node number, the coordinates, and the connection node Etc. is displayed. The information input screen 52 changes by designating the node search as indicated by 54. In the information search, the coordinates of the point clicked on the map screen are calculated, the coordinates of all basic road node data and all road node data of the corresponding mesh are checked, and the node whose distance is the closest is designated. Set as If the distance between the clicked point and the closest node exceeds a certain threshold value, it is determined that there is no corresponding data, and nothing is displayed on the information input screen 52. If node data of the same distance is found in the basic road node data and all road node data, the basic road node data is set.

FIG. 5 is an example of a screen when a link search of the national digital road map database 20 is performed by specifying a link on the map. In the figure, 51 is an example of a map display screen, 52 is an example of an information input screen, 53 is an example of a map operation unit, 54 is an example in which a link search is specified, and 58 is a link of the link specified in the map display screen 51. It is an example. The screen operation main menu 111 is used to specify the data search of the national digital road map database, and the map display screen 5
By designating the link 58 on 1, the retrieved data, for example, information such as the mesh number and the node numbers at both ends of the link are displayed on the information input screen 52. The information input screen 52 changes by designating the link search as indicated by 54. In the information search, the coordinates of the point clicked on the map screen are calculated, and all the basic road link data of the corresponding mesh, the interpolation point coordinates of all the road link data are checked,
The link having the shortest distance between the straight line between the interpolation points and the clicked coordinates is set as the specified link. Here, if the distance between the clicked point and the closest link exceeds a certain threshold value, there is no corresponding data, and nothing is displayed on the information input screen 52. If link data of the same distance is found in the basic road link data and all road link data, the basic road link data is set.

Embodiment 3 Next, a third embodiment of the present invention will be described in detail with reference to the drawings. FIG. 6 is an example of a screen on which data of a sensor is created. In the figure, 51 is a map display screen, 52 is an information input screen, 53 is an example of a map operation unit, 59 is an example of a menu for specifying constants, and 60 is an example of a position for setting a sensor specified by the user. The screen operation main menu 111 is used to specify creation of a constant file, and the constant specification menu 59 is used to specify the type of creation of a constant. Here, sensor data creation is specified. On the display screen 51, all the set constants of the designated type are displayed. Here, the constant data to be displayed on the map is easy to understand by changing the shape and color of the symbol according to the type of the constant, and the information being set is displayed by another symbol. The constants include, for example, information necessary for a traffic control system such as a vehicle detector, a traffic light, an intersection, and an information board. In this example, it is indicated that the detector is selected. The point 60 specified on the map display screen 51 indicates that the position of the sensor specified on the information input screen is displayed. After inputting necessary information such as a management number, a type, and a unique threshold value on the information input screen 52, the contents of the information input screen are set as constant information in the memory by selecting a setting button. When cancel is selected, the currently set contents are cleared. The information set in the memory is output to a file by selecting save, and a constant file is created.

Embodiment 4 Next, a fourth embodiment of the present invention will be described in detail with reference to the drawings. FIG. 7 is an example of a screen when a search is made for constant data that has already been set. In the figure, 51 is a map display screen, 52 is an information input screen,
53 is an example of a map operation unit, 59 is an example of a menu for specifying a constant, and 61 is an example of the position of a sensor specified by the user for search. The screen operation main menu 111 is used to specify creation of a constant file, and the constant specification menu 59 is used to specify the type of creation of a constant. Here, sensor data creation is specified. On the display screen 51, all the set constants of the specified type are displayed. Information is searched for by inputting the management number on the information input screen 52 and designating the search, displaying the information on the information input screen 52, and displaying the data 6 on the map display screen 51.
1 is displayed in a different color. A search is performed by designating a symbol on the map, and the result is displayed on an information input screen 52.
Can also be displayed. The retrieved data can be changed, and when the data is changed, the data is set in the constant information on the memory by selecting a setting. When the searched data is to be deleted, the deletion is selected to delete the data from the constant information in the memory. The changed contents are saved to a file by selecting Save.

[0020]

As described above, according to the constant management apparatus according to the present invention, only necessary road map information is displayed on the map display screen, and points designated on the map display screen are detected as position information. Thus, it is possible to easily search for the node or link to which the designated point belongs, so that the road information can be easily grasped. In addition, by creating a constant in accordance with the point specified on the map display screen and the contents set on the information input screen, the constant can be created while accurately confirming the position and the set contents. Furthermore, since the specified information can be searched on the information input screen and the result can be displayed on the map display screen, it is possible to visually verify that the constants have been correctly created.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a constant management device according to the present invention.

FIG. 2 is an example of a screen when a node search of data of the national digital road map database of the present invention is designated.

FIG. 3 is an example of a screen when a link search of data of the national digital road map database of the present invention is designated.

FIG. 4 is a screen example when a node search from a map screen of data of a nationwide digital road map database of the present invention is designated.

FIG. 5 is an example of a screen when a link search from a map screen of data of the national digital road map database of the present invention is designated.

FIG. 6 is an example of a screen in a case where creation of sensor data is designated as creation of a constant file according to the present invention.

FIG. 7 is an example of a screen when a search for sensor data is designated in creating a constant file according to the present invention.

FIG. 8 is a data configuration of a nationwide digital road map database.

FIG. 9 is a diagram showing a relationship between information in a national digital road map database and a map.

[Explanation of symbols]

1 national digital road map database, 10 constant management device, 20 national digital road map database, 2
1 Various constant files, 54 node search, link search specification button, 60 sensors, 61 sensors, 111
Screen operation main menu, 112 Map display screen, 11
3 Information input screen, 114 Map operation unit.

Claims (4)

[Claims] 1. National road map database, basic road node data, basic road link data, all road node data, all road link data, water system data, administrative boundary position data, railway position data, facility and other position data, facilities, etc. Means for reading shape data, display position data such as place names, storage means for storing digital information for each data type, and road map information of a data type specified on a map display screen from information stored in the storage means A means for creating and displaying background information, a means for specifying a node search and a mesh number and a node number in the case of a node search from an information input screen, and a means for specifying a link search and a mesh number in a case of a link search. Means for designating the start node number and end node number of the link, and A constant management device comprising: means for searching for nodes and links; means for displaying searched information in different colors on a map display screen; and means for displaying related information on an information input screen. 2. When performing a search by designation on a map display screen, specify a node search in the case of a node search,
By specifying a node on the map display screen and issuing a search instruction, means for searching for basic road node data, all road node data, and node information such as mesh numbers, node numbers, coordinates, connection node information, etc. Display on the information input screen, specify the link search in the case of link search, specify the link on the map display screen, issue the search instruction, search the basic road link data, all road link data 2. The constant management apparatus according to claim 1, further comprising: means for displaying link information such as a mesh number, a start node number, an end node number, a road type, and a link length on an information input screen. 3. When creating a constant that requires information such as node numbers and coordinates of a nationwide digital road map database, a type for creating the constant is specified on the information input screen and specified on the map display screen. 2. A means according to claim 1, further comprising means for setting an arbitrary point as coordinates of necessary information, inputting detailed contents such as a management number on an information input screen, and issuing a setting instruction to generate a constant. Constant management device. 4. Searching the contents of the created constant, after specifying the type of the constant on the information input screen, inputting a management number and issuing a search instruction to search for the specified information; 2. A device for displaying detailed contents on an information input screen and changing and setting constants.
The constant management device described.