KR100663025B1 - Method for updating display map in navigation system - Google Patents

Abstract

The present invention relates to a method of updating a background map of a navigation system, wherein the moving object is moved to a user by gradually updating a predetermined middle background map along a predetermined central axis connecting a center point of a current background map and a center point of a next background map. It delivers the direction more effectively and three-dimensionally, and enables the quick update without slowing down speed by using the system's resource usage to the minimum. For this purpose, based on the N + 1st moving position of the moving object, The intermediate background map is fixed in the clipped main map until a predetermined background map based on the N + 1th moving position of the moving object is clipped by clipping a main map for extracting a predetermined intermediate background map, which is a virtual screen area. Extract every interval and update continuously on the screen And to.

Middle, background, map, update, moving

Description

Method for updating display map in navigation system}

1 is a diagram illustrating a general background map updating method;

2 is a view showing a navigation system to which the present invention is applied;

FIG. 3 is a diagram for explaining a main map for extracting an intermediate background map of FIG. 2; FIG.

4 is a diagram illustrating a background map updating method according to the present invention;

FIG. 5 is a diagram illustrating the middle background map updating step of FIG. 3 in more detail;

6 is a view for explaining in more detail the update method according to the present invention;

7 is a view for explaining an intermediate background map center point calculation embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

100: GPS receiver 110: command input unit

120: background map storage unit 130: the main map clipping unit for extracting the intermediate background map

140: control unit 150: display unit

The present invention provides a system that delivers the moving direction of a moving object more effectively and three-dimensionally to a user by gradually updating a predetermined intermediate background map along a predetermined central axis connecting the center point of the current background map and the center point of the next background map. The present invention relates to a method of updating a background map of a navigation system that enables a quick update without slowing down with minimum use of resources.

In general, a vehicle navigation system calculates a current position of a driving vehicle by using radio signals transmitted from a plurality of satellites belonging to a global positioning system and signals transmitted from vehicle sensors, and compares the calculated position with map data. It provides a function to guide the recommended route from the origin to the destination.

In order to input a starting point or a destination for such a route search, or to look at the main facility information of a neighboring area around a current location, a function of updating a background map screen in real time according to a user's input is essential. The following describes the general update method in more detail.

As shown in FIG. 1, when the position of the moving object is moved from P0 to P1, in order to generate a background map screen based on this, neighboring leaf data adjacent to the leaf where the center point is located is loaded into the memory. Then, it performs the operation of changing the screen coordinates to move from the A background screen to the B background screen. At this time, the screen is suddenly updated to a new position, which not only gives the user a sense of rejection but also effectively conveys the moving direction of the moving object. The problem is that it does not.

However, such a sliding map screen updating method repeatedly performs the operation of updating the wallpaper around a new location within a predetermined time, so that the overall update speed is slowed down, and the screen is suddenly updated to the background map of the next location. There is a problem in that the updating speed of the moving object is not effectively transmitted to the user, and the updating speed is slowed down by repeatedly performing the operation of updating the background screen around the new location within a predetermined time.

Therefore, there is a need for an improved update method that avoids repetitive repetition of the same operation and minimizes the use of resources of the system so that the speed is not reduced and in particular, the moving direction of the moving object and the surrounding environment can be more effectively transmitted to the user.

Accordingly, an object of the present invention is to provide a method of updating a background map of a navigation system that can more effectively convey a moving direction to a user without slowing down.

In accordance with this object, the present invention is to visualize the intermediate background map of the same size as the screen display area between the current Nth position point and the next N + 1th position point continuously on the screen by a predetermined distance along a straight line connecting the center points. It is intended to deliver the moving direction of the moving object more effectively and three-dimensionally, and to calculate the center point of the middle background map located on a straight line connecting the map center point before the sliding state and the new map center point after the sliding without shaking.

Hereinafter, the present invention will be described with reference to the accompanying drawings.

First, a navigation system to which the present invention is applied will be described with reference to FIG. 2.

As shown in FIG. 2, the navigation system to which the present invention is applied includes a GPS receiver 100 that receives GPS data transmitted by a plurality of GPS satellites and calculates position data of a moving object. A command input unit 110 for receiving a background map update command data, a background map storage unit 120 for storing a large amount of whole map data consisting of a plurality of leaves, and a main map for dynamically extracting a leaf of a predetermined size, ie, an intermediate background map. The main map clipping unit 130 for extracting the intermediate background map, and the intermediate background map under the control of the control unit 140 and the control unit 140 are continuously sliding between the current position and the next position of the moving object on the screen. The display unit 150 is updated.

The navigation system for the present invention is completed by a general automatic setting method of the control unit 140 related to manual selection of the user through the command input unit 110 or next position setting of the moving object. When the control unit 140 uses the current N th position information detected by the GPS receiver 100, the background map storage unit 120 has an intermediate background map having a predetermined size based on the N th position information. Extract the main map for extraction.

The main map for extracting the intermediate background map used in the present invention is an imaginary background map area larger than the screen display area with the Nth position as the center point, and the Nth moving position of the moving object as the center point. It may have a size that can include both a predetermined background map displayed on the screen based on the first moving position and a predetermined background map displayed on the screen based on the N + 1th moving position of the moving object. It is desirable to set the area to an integer multiple of 4 times larger than the current viewport.

And, the main map for extracting the intermediate background map has a predetermined size based on the position only when the position of the moving object that is set by clipping the main map clipping unit 130 for the intermediate background map extraction is converted under the control of the controller 140. It is created and managed dynamically.

On the other hand, under the control of the controller 140, if the main map for intermediate background map extraction is read by the background map storage unit 120 and is clipped by the main map clipping unit 130 for intermediate background map extraction, the controller 140 is a moving object. Until the predetermined background map based on the N + 1th moving position of the screen is displayed on the screen, the middle background map is extracted from the clipped main map at regular intervals and continuously updated on the screen through the display unit 150.

That is, the controller 140 extracts the intermediate background map from the clipped main map, and moves the intermediate background map by a predetermined distance along a predetermined central axis connecting the background map center point of the Nth position of the moving object and the background map center point of the N + 1th position. The unit sequence for updating the screen is repeatedly performed until the N + 1th moving position of the moving object passes, and the intermediate background map is continuously updated on the screen through the display unit 150.

For example, the controller 140 calculates an i-th center point of the intermediate background map to be updated, extracts a predetermined intermediate background map with a size corresponding to the screen display area size from the clipped main map based on the center point, The extracted intermediate background map is updated on the screen through the display unit, and the length from the Nth position point to the i center point is compared with the length from the Nth position point to the N + 1st position point of the moving object.

As a result of the comparison, when the length from the Nth position point to the i th center point is less than or equal to the length from the Nth position point to the N + 1st position point of the moving object, i ++ (i = i + 1) is repeated to repeat the above sequence. A predetermined background based on the N + 1th position of the movable body when the length from the Nth position point to the i-th center point exceeds the length from the Nth position point to the N + 1st position point of the movable body Load a new map and update it on the screen.

As a result, according to the present invention, the intermediate background map having the same size as the screen display area is continuously visualized on the screen between the current N th position point and the next N + 1 th position point, thereby providing the user with the moving direction of the moving object. It is possible to deliver more effectively and three-dimensionally, and by gradually moving the calculated intermediate background map along a predetermined central axis, it is possible to update the background map quickly.

As described above, in the present invention, when the background map screen is updated, the intermediate background map screen is gradually moved as if it slides along a predetermined central axis when moving from the current position to the new position, thereby providing sliding that moves naturally without sudden change. This makes it easier to tell the geographic relationship between your current location and your new next location.

Next, the main map for extracting the intermediate background map used in the present invention will be described in more detail with reference to FIG. 3.

The main map for extracting the intermediate background map used in the present invention is a virtual background map area larger than the screen display area by a certain size with the current point as the center point, as shown in FIG. With the center point as the center point, a size that can include both a predetermined background map displayed on the screen based on the Nth moving position of the moving object and a predetermined background map displayed on the screen based on the N + 1st moving position of the moving object. You just have to. To this end, for example, a predetermined length (x ', y') is added to a length (x, y) corresponding to half of the horizontal / vertical diameter of the viewport, which is a screen display area centered on the current position, or Or it can be set to a region generated by multiplying by a predetermined set integer multiple (m, n), such a setting can be variously modified within the scope without departing from the technical spirit of the present invention.

Next, the background map updating method of the navigation system according to the present invention will be described with reference to FIG. 4.

The background map updating method of the navigation system according to the present invention first clips a main map for extracting a predetermined intermediate background map, which is a virtual screen area, based on the Nth moving position of the moving object according to the N + 1th moving position setting of the moving object. .

That is, as shown in FIG. 4, an intermediate background map update command is input (S401), and accordingly, the N + 1th moving position point of the moving object is set by the user's manual setting or the next position setting of the moving object. When completed by the general automatic setting method of the associated control unit, the intermediate map for the present invention having a predetermined size based on the Nth position information in the background map storage unit using the current Nth position information detected by the GPS receiver (S402). The main map for background map extraction is read (S403).

Thereafter, a memory region corresponding to the size of the intermediate background map extraction main map is allocated (S404), and the intermediate background map extraction main map read in step S403 is clipped to the allocated memory region (S405).

Next, when the main map for extracting a predetermined intermediate background map, which is a virtual screen area, is clipped based on the N + 1th moving position of the moving object, the present invention provides the N + 1th moving of the moving object. Until the predetermined background map based on the location is displayed on the screen, the intermediate background map is extracted from the main map clipped in the first process at regular intervals and continuously updated on the screen.

That is, as shown, after the clipping step, the present invention extracts the background map having the center point as the center point from the main background for the middle background map extraction by the screen display area (S406) and displays the extracted background map on the screen. In operation S407, the intermediate background map is extracted from the main background for extracting the intermediate background map at predetermined intervals until the N + 1th position is elapsed, and the screen is updated at operation S408.

At this time, the middle background map is extracted from the main map clipped as much as possible, and the screen is moved by a predetermined distance along the predetermined central axis connecting the center point of the background map of the Nth position of the moving object and the background map center of the N + 1th position of the moving object. It is preferable to repeatedly update the intermediate background map on the screen by repeatedly performing the updating unit sequence until the N + 1th moving position of the moving object. Hereinafter, the intermediate background map of FIG. The update sequence is described in more detail.

In the middle background map extraction and updating according to the present invention, as shown in FIG. 5, first, the i-th center point of the middle background map to be updated is calculated (S481), and the center point calculated in step S481 is calculated by the moving object. It becomes a point on a straight line connecting the background map center point of the Nth position and the background map center point of the N + 1th position.

Next, the i-th middle background map having the size corresponding to the screen display area size is extracted from the main map for extracting the middle background map clipped in step (S482) and updated on the screen. S483).

Then, the length from the Nth position point representing the current position of the movable body to the i-th center point calculated in step and the length from the Nth position point of the movable body to the N + 1st position point representing the next position of the movable body Compare (S484) to continuously update the intermediate background map on the screen according to the comparison result, or to update the N + 1 th background map on the screen.

That is, as a result of the comparison of step S484, if the length from the Nth position point to the i center point is less than or equal to the length from the Nth position point to the N + 1st position point of the moving object, i ++ (i = i + 1) is performed. It proceeds to the step and routinely repeats the above-described sequence, and this routine operation is such that the length from the Nth position point to the i center point exceeds the length from the Nth position point to the N + 1st position point of the moving object. In the case of being terminated and exceeding, a predetermined background map based on the N + 1th position of the moving object is newly loaded and updated on the screen to enable continuous updating.

Next, the background map updating method according to the present invention will be described in more detail with reference to FIG. 6.

The background map screen update using the sliding method according to the present invention first generates A ', which is a virtual screen area larger than the current viewport, centering on P0, wherein A' is the main background map extraction main defined in the present invention. As a map area, A 'is a screen based on a predetermined background map displayed on the screen based on the Nth moving position of the moving object and the N + 1th moving position of the moving object with respect to the Nth moving position of the current moving object. It may have a size that can include all of the predetermined background map displayed on the screen.

On the other hand, by clipping A ', the main map area for middle background map extraction, the background map A corresponding to the current viewport is visualized on the screen, and when moving the center of the screen from P0 to P1, By extracting the middle background map centered on one point from the main map area and visualizing it on the screen, it is possible to transmit the surrounding information to the user more accurately according to the moving direction of the moving object, and based on a predetermined center point that has already been calculated. Since the background map can be moved slowly, the background map can be updated quickly.

Next, a description will be given of the intermediate background map center point calculation embodiment of the present invention with reference to FIG.

The present invention provides a method of calculating the center point position of a middle image of a sliding background map, which can be calculated without shaking the center point of the middle background map located on a straight line connecting the center point of the background map before sliding and the map center point after sliding.

First, the intermediate background map center point calculation according to the present invention refers to a predetermined background map having the current N th position as a center point "A", its center point as P0, and a predetermined point having the N + 1 th position as a center point. The background map of is called "B" and the position of the center point is called P1 (a, b). The center point of the position where the line segment connecting P0 and P1 is moved a predetermined number n times by Δd, which is a predetermined interval, is called P ', where P' is the center point of the predetermined intermediate background map, P '(X, Y). The equation to obtain is as follows.

x = n × Δd × cosθ,

y = n × △ d × sinθ

Where Δd is an arbitrary constant and n is the number of intermediate screens

,

이다,

,

to be,

As described in detail above, the method of updating the background map of the navigation system according to the present invention can transmit the moving direction of the moving object to the user more effectively and in a three-dimensional manner, by gradually moving the calculated intermediate background map along a predetermined central axis. This avoids repetitive repetition of the same operation and minimizes resource usage of the system, thereby enabling fast updates without slowing down.

Although the invention has been described in detail only with respect to the specific examples described, it will be apparent to those skilled in the art that various modifications and variations are possible within the spirit of the invention, and such modifications and variations belong to the appended claims.

Claims (5)

It includes both a predetermined background map displayed on the screen based on the N + 1th position of the moving object and a predetermined background map displayed on the screen based on the N + 1th position of the moving object according to the N + 1th position setting of the moving object. Clipping a main map for extracting an intermediate background map of a size that can be obtained; After displaying the background map based on the Nth position of the moving object on the screen, and before displaying the background map based on the N + 1th position of the moving object on the screen, the Nth position of the moving object in the clipped main map A second process of repeatedly performing a unit sequence of updating the screen by extracting an intermediate background map based on points close to the Nth position among points positioned at a predetermined interval on a straight line connecting the N + 1th position A method of updating a background map of a navigation system, including. delete The method of claim 1, wherein the second process comprises: Calculating an i th center point of a predetermined intermediate background map to be updated among points on a straight line connecting the N th position and the N + 1 th position of the moving object; A step 2-2 of extracting a predetermined intermediate background map having a size corresponding to a screen display area size from a main map clipped in the first step based on the center point; Updating the intermediate background map extracted in step 2-2 to the screen, and comparing the linear distance from the Nth position point to the i-th center point and the linear distance from the Nth position to the N + 1th position of the moving object; 2-3 process; As a result of the comparison of the step 2-3, when the length from the Nth position to the i center point is less than or equal to the length from the Nth position to the N + 1th position of the moving body, i ++ The background map updating method of the navigation system, characterized in that it comprises a second to second process proceeds to -1 process. 4. The method of claim 3, further comprising: after the second to fourth processes; As a result of the comparison of the step 2-3, when the linear distance from the Nth position to the i-th center point exceeds the length from the Nth position to the N + 1th position of the movable body, the N + 1th position of the movable body is based on And loading a new predetermined background map and updating the screen on the screen. The method of claim 1, wherein the main map for extracting the intermediate background map; It has a size that can include both the current background map displayed on the screen based on the Nth position of the current moving object and the next background map displayed on the screen based on the N + 1th position. How to update the background map of the navigation system, characterized in that.

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