KR19990061949A - Intersection Marking Method of Vehicle Navigation System and Its Apparatus - Google Patents

Abstract

The disclosed invention relates to a method for displaying intersections of a vehicle navigation system and a device therefor, the method comprising: a first method for constructing a three-dimensional coordinate on a recording medium corresponding to an edge of a feature based on an intersection in a method for displaying intersections of a vehicle navigation system; step; Receiving a satellite signal from a GPS satellite and detecting a location of the vehicle; A third step of determining whether the intersection is on the electronic map in the traveling direction of the vehicle according to the position of the vehicle detected by the second step; A fourth step of determining whether there is a feature to be displayed in three dimensions around the intersection when there is an intersection on the electronic map as a result of the determination of the third step; A fifth step of reading the three-dimensional coordinates of the previously constructed features and displaying the features in three dimensions based on the vehicle when there is a feature to be displayed in three dimensions as the determination result of the fourth step; And a sixth step of displaying geographic information in two dimensions when there are no intersections in the traveling direction of the vehicle or when there are no features to display in three dimensions as a result of the determination of the third and fourth steps.

Description

Intersection Marking Method of Vehicle Navigation System and Its Apparatus

The present invention relates to an intersection display method and a device of the vehicle navigation system, in particular, the three-dimensional coordinates corresponding to the edge of the surrounding feature in advance with respect to the intersection with the intersection of the vehicle when the traveling direction is close to the intersection The present invention relates to a method and apparatus for displaying intersections of a vehicle navigation system for modeling a feature according to three-dimensional coordinates already constructed in a database together with surrounding geographical information data.

In general, the vehicle navigation system receives satellite signals from the GPS satellites, detects the vehicle position, and displays the position on the electronic map. The vehicle navigation system follows the driving trajectory according to the movement of the vehicle and displays it on the screen. However, in the vehicle navigation system, the electronic map is constructed as a database by hierarchically organizing geographic information according to the accumulation rate. That is, the database for geographic information is composed of a large amount of data such as management data, road data, administrative area data, feature data, background data, and additional information data, and is usually stored on a recording medium such as a compact disc (CD). .

Such a conventional vehicle navigation system is required to construct a database more efficiently as a large amount of data is required when constructing a database of geographic information on an electronic map.

However, in the prior art, when the feature data is constructed as a database, a database is constructed with image data such as photographs and pictures, and the like is recorded on a recording medium. In addition to having a memory having a storage capacity, there is a problem in that a rapid display operation is restricted since the area occupied by the feature is displayed by individual pixels.

It is an object of the present invention to track a vehicle's driving trajectory and, when the vehicle is close to the intersection, model the feature according to the three-dimensional coordinates already established in the database together with the geographic information data of the intersection and display it on the screen. The present invention provides a method for displaying intersections of navigation systems.

Another object of the present invention is to construct a three-dimensional coordinates corresponding to the edge of the feature located at the intersection as a database in advance, if the vehicle is close to the intersection modeling the feature according to the already constructed three-dimensional coordinates with geographic information data To provide an intersection display device of a vehicle navigation system to display on the screen.

1 is a block diagram of an intersection display device of a vehicle navigation system according to the present invention;

2 is a view illustrating an intersection display operation according to the present invention;

Figure 3 is a flow chart showing the intersection display method of the vehicle navigation system according to the present invention.

Explanation of symbols on the main parts of the drawings

10: GPS receiver 11: key input unit

12: vehicle navigation control unit 13: electronic map playback unit

14: terminal

An object of the present invention as described above, in the intersection display method of the vehicle navigation system, the first step of constructing a three-dimensional coordinates corresponding to the edge of the feature on the recording medium on the basis of the intersection; Receiving a satellite signal from a GPS satellite and detecting a location of the vehicle; A third step of determining whether the intersection is on the electronic map in the traveling direction of the vehicle according to the position of the vehicle detected by the second step; A fourth step of determining whether there is a feature to be displayed in three dimensions around the intersection when there is an intersection on the electronic map as a result of the determination of the third step; A fifth step of reading the three-dimensional coordinates of the previously constructed features and displaying the features in three dimensions based on the vehicle when there is a feature to be displayed in three dimensions as the determination result of the fourth step; And a sixth step of displaying geographic information in two dimensions when there are no intersections in the traveling direction of the vehicle or there are no features to display in three dimensions as a result of the determination of the third and fourth steps.

Another object of the present invention as described above is a vehicle navigation system comprising: a GPS receiver for receiving a satellite signal from a GPS satellite; A key input unit for outputting a key signal for performing a vehicle navigation function; Stores geographic information hierarchically, and constructs 3D coordinates corresponding to the edges of the feature based on intersections separately from the stored geographic information, and simultaneously reproduces the 3D coordinates of the constructed feature when playing the geographic information. An electronic map player; Detecting the position of the vehicle by analyzing the satellite signal received through the GPS receiver, and displaying the position of the vehicle on the electronic map 3D coordinates of the features of the intersection when the vehicle proceeds to the intersection on the electronic map Vehicle navigation control unit for modeling the feature based on the; And a terminal for displaying the position of the vehicle on the electronic map from the vehicle navigation controller and displaying the feature of the modeled intersection.

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of an intersection display device of a vehicle navigation system according to the present invention. As shown, the present invention is a GPS receiver 10 for receiving a satellite signal from a GPS satellite, a key input unit 11 for outputting a key signal for performing a vehicle navigation function, and stores geographical information hierarchically In addition to the stored geographic information, an electronic map reproducing unit 13 which constructs a 3D coordinate corresponding to the edge of the feature based on the intersection as a database and simultaneously reproduces the 3D coordinates of the constructed feature when playing the geographic information. When the vehicle proceeds to the intersection on the electronic map when the position of the vehicle is detected by analyzing the satellite signal received through the GPS receiver 10 and the position of the vehicle is displayed on the electronic map, the feature of the intersection Vehicle navigation control unit 12 for modeling a feature based on the three-dimensional coordinates for the vehicle, and display the position of the vehicle on the electronic map from the vehicle navigation control unit 12, modeling And a terminal 14 for displaying a feature of a cross street.

The effect of the intersection display device of the vehicle navigation system according to the present invention configured as described above will be described in detail.

The present invention adopts the same method as the conventional method for displaying the location of the vehicle on the electronic map by reproducing the geographic information through the electronic map reproducing unit 13 when detecting the location of the vehicle and displaying it on the electronic map. do. However, the vehicle navigation controller 12 models the feature with the three-dimensional coordinates corresponding to the edge of the feature already constructed in the electronic map reproducing unit 13, and displays the modeled feature on the screen. It is characterized by printing.

The present invention does not store data about a region of a feature, but constructs a 3D coordinate database corresponding to a corner using a neighboring intersection as a reference point, and when outputting the feature, a 3D corresponding to the edge of the feature. Modeling the stereoscopic shape of the feature by the coordinates, the modeled feature is displayed together on the electronic map.

Such a modeling operation of the present invention will be described in more detail with reference to FIG. 2. As shown in FIG. 2, the vehicle C is located on the intersection. The current vehicle (C) proceeds in the direction of the arrow, so that the geographic information displayed on the screen is gradually moved while scrolling and approaches the feature B1 located near the intersection. At this time, the modeling is performed according to the 3D coordinates corresponding to the edge of the feature B1, and the modeled feature is displayed together with the background data. The three-dimensional coordinates of this feature must be preceded by the construction of the database separately from the geographic information. The coordinates are given in the X, Y, and Z directions in the direction of the center of the intersection. That is, the reference point (A) dml three-dimensional coordinates are (0,0,0) and the three-dimensional coordinates for the edge of the feature is given a coordinate value according to the distance away from the reference point (A).

The vehicle navigation controller 12 analyzes the satellite signal received through the GPS receiver 10 to detect the current position of the vehicle and displays the position of the vehicle on an electronic map to the fraudulent electronic map reproducing unit 13. It displays the driving trajectory of the vehicle by reproducing the stored geographic information. When the vehicle proceeds in the intersection direction and approaches the feature B1 adjacent to the intersection, for example, of the feature B1 reproduced with the geographic information. The shape of the feature is modeled according to the three-dimensional coordinates corresponding to the edges. Subsequently, the vehicle navigation control unit 12 displays a feature modeled together with geographic information so that a vehicle driver or the like can easily identify the feature. The vehicle navigation control unit 12 may display geographic information in a two-dimensional plane form without displaying a feature in a general road or three-dimensional rather than an intersection.

Hereinafter, the intersection display method of the vehicle navigation system according to the present invention will be described according to the operation flowchart of FIG.

First of all, for a feature near an intersection to be displayed in three-dimensional shape when recording geographic information on a recording medium such as a compact disc (CD), the three-dimensional coordinates of the edge of the feature are separated from the geographic information based on the center of the intersection. (Step 101). The vehicle navigation controller 12 analyzes the satellite signal received through the GPS receiver 10 to detect the current position of the vehicle (step 102). Subsequently, the vehicle navigation control unit 12 reproduces the geographic information and the three-dimensional coordinates of the separately constructed feature through the electronic map reproducing unit 13 to display the detected position of the vehicle on the electronic map. It is determined whether there is an intersection in the advancing direction of step S103. If there is an intersection as a result of the determination in step 103, it is determined whether there is a feature to be displayed in three dimensions (step 104). If there is a feature to be displayed in three dimensions as a result of the determination in step 104, the modeling is performed according to the three-dimensional coordinates corresponding to the edge of the feature to display the feature modeled in the shape viewed from the vehicle together with the background data. Step 105). If there is no intersection as a result of the determination in step 103 or if there are no features to be displayed in three dimensions as a result of the determination in step 104, the reproduced geographic information is displayed in two dimensions (step 106).

In the present invention as described above, three-dimensional coordinates corresponding to the edges of the feature are constructed in advance as a database, and when the vehicle is close to the intersection, the feature is modeled according to the three-dimensional coordinate together with the geographic information data. Since it can be displayed on the screen together with the background data, a small amount of memory can be used, and the feature can be displayed quickly by modeling.

Claims (2)

In the intersection display method of the vehicle navigation system, A first step of constructing a three-dimensional coordinate corresponding to an edge of a feature on the recording medium based on the intersection; Receiving a satellite signal from a GPS satellite and detecting a location of the vehicle; A third step of determining whether the intersection is on the electronic map in the traveling direction of the vehicle according to the position of the vehicle detected by the second step; A fourth step of determining whether there is a feature to be displayed in three dimensions around the intersection when there is an intersection on the electronic map as a result of the determination of the third step; A fifth step of reading the three-dimensional coordinates of the previously constructed features and displaying the features in three dimensions based on the vehicle when there is a feature to be displayed in three dimensions as the determination result of the fourth step; And And a sixth step of displaying geographic information in two dimensions when there are no intersections in the traveling direction of the vehicle or when there are no features to display in three dimensions as a result of the determination of the third and fourth steps. How to mark intersections. In a vehicle navigation system, A GPS receiver for receiving a satellite signal from a GPS satellite; A key input unit for outputting a key signal for performing a vehicle navigation function; Stores geographic information hierarchically, and constructs 3D coordinates corresponding to the edges of the feature based on intersections separately from the stored geographic information, and simultaneously reproduces the 3D coordinates of the constructed feature when playing the geographic information. An electronic map player; Detecting the position of the vehicle by analyzing the satellite signal received through the GPS receiver, and displaying the position of the vehicle on the electronic map 3D coordinates of the features of the intersection when the vehicle proceeds to the intersection on the electronic map Vehicle navigation control unit for modeling the feature based on the; And And a terminal for displaying the position of the vehicle on the electronic map from the vehicle navigation controller and displaying a feature of the modeled intersection.