WO2009119944A1

WO2009119944A1 - Apparatus and method for changing view angle in three dimesion route guidance system

Info

Publication number: WO2009119944A1
Application number: PCT/KR2008/003788
Authority: WO
Inventors: Hak Soo Kim
Original assignee: Thinkware Systems Corporation
Priority date: 2008-03-26
Filing date: 2008-06-29
Publication date: 2009-10-01
Also published as: CN102047302B; KR20090102483A; KR100944641B1; CN102047302A

Abstract

A view angle changing apparatus and view angle changing method in a three dimensional (3D) route guidance system is provided. The view angle changing apparatus includes: a distance information obtaining unit to obtain distance information from a current location to a guide point (GP) of the 3D route guidance system which guides a moving route using a 3D map; a determination unit to determine whether the 3D route guidance system is located within a predetermined distance from the GP based on the distance information; and a view angle changing unit to change a view angle for guiding a route for the GP depending on whether the route guidance system is located within the predetermined distance from the GP.

Description

APPARATUS AND METHOD FOR CHANGING VIEW ANGLE IN THREE DIMESION ROUTE GUIDANCE SYSTEM

Technical Field The present invention relates to a view angle changing apparatus and view angle changing method in a three dimensional (3D) route guidance system, and more particularly, to a view angle changing apparatus and view angle changing method to guide a route for a guide point (GP) according to a distance from a current location of a 3D route guidance system to the GP, the 3D route guidance system guiding a moving route using a 3D map.

Background Art

In general, a route guidance system is a system capable of guiding a user through a route to a destination point by recognizing a current location using an embedded satellite navigation terminal such as a global positioning system (GPS).

Such route guidance system collects location information of latitude, longitude, and height received from 24 GPS satellites orbiting 20,000 km above the earth and compares this information with output signals of stand-alone sensors equipped in a motor vehicle. In such a fashion, the route guidance system detects a current location, and provides the current location, directional information, and other convenient information to the user using an audio/video (A/V) system equipped in the motor vehicle.

Such a route guidance system stores a map database and provides various driving conditions and road maps, and creates various traffic regulation data for each road using the map database, the various driving conditions, and road maps. As described, since a route guidance system is capable of maximizing an effective usage of roads by providing various driving conditions, road maps, and real-time traffic information, the route guidance system may alleviate the amount of overall traffic.

A conventional route guidance system uses two dimensional (2D) map data and 2D gyro sensors, and, for example, when a car enters a location where a road is located underneath and parallel to another elevated road such as in Jamsoo bridge and Banpo bridge, whether a current location of the car is located on the ground road or on the elevated road cannot be estimated as current location coordinates of the car is obtained by horizontal transitions through using the 2D gyro sensors.

Consequently, a recent route guidance system is capable of accurately displaying a current car location using three dimensional (3D) map data and 3D gyro sensors even when the car is located in a location where a ground road and another elevated road are running in parallel. Also, the recent route guidance system is undergoing developments to provide more realistic display modes to users through displaying surrounding structures in the 3D.

In general, a recognition distance in which a user being provided a route via a route guidance system ranges from 500 to 600 meters.

FIG. 1 is a diagram illustrating an example of a display mode which guides a route with respect to a guide point (GP) in a route guidance system using a conventional 3D map.

Referring to FIG. 1, the route guidance system using the conventional 3D map has a problem in that, it is not easy for a user to recognize a corresponding turning point since a perspective angle is low when a remaining distance is 610 meters from a current location to the GP as in reference numeral 110.

As described, the route guidance system using the conventional 3D map provides a user with perspective which is close to realistic environments via a 3D map display function, however there is a problem in that, a sense of distance with respect to the GP is not transmitted to the user although the route guidance system using the conventional 3D map provides a reahV.ic perspective display which is close to actual environments.

Also, the route guidance system using the conventional 3D map has a problem in that, a user may not readily recognize a GP hidden by structures, such as when a remaining distance is 500 meters as in reference numeral 120, 350 meters as in reference numeral 130, and 200 meters as in reference numeral 140, since the route guidance system using the conventional 3D map displays the structures located on a driving route in 3D when a GP is not a straight section such as a right-turn, a left-turn, or a u-turn.

As described above, the route guidance system using the conventional 3D map has a problem of not being suitable for an actual driving mode since a sense of distance is not accurately recognizable in comparison to using a 2D map although the route guidance system using the conventional 3D map has an advantage of displaying a 3D map and providing good environments. Accordingly, most users using the route guidance system using the conventional 3D map tend to use 2D head-up display mode due to feeling of uneasiness caused by the inaccurate route guidance.

Therefore, a new method capable of improving recognition with respect to a GP for users by accurately providing a sense of distance and a guiding view point with respect to the GP using a 3D map, is required.

Disclosure of Invention Technical Goals

The present invention provides a view angle changing apparatus and view angle changing method for a guide point (GP) according to a remaining distance from a current location to the GP in a route guidance system using a three dimensional (3D) map.

The present invention also provides a view angle changing apparatus and view angle changing method to improve visibility and recognition for a GP using a current location of a user, a speed, and a remaining distance received from a GPS based on route search data and guidance data in a route guidance system using a 3D map. The present invention also provides a view angle changing apparatus and view angle changing method which can improve a user's recognition of a GP by altering a perspective angle and a zoom level according to circumstances of a guidance distance and the GP in a route guidance system using 3D map. Technical solutions According to an aspect of the present invention, there is provided a view angle changing apparatus in a three dimensional (3D) route guidance system including: a distance information obtaining unit to obtain distance information from a current location to a guide point (GP) of the 3D route guidance system which guides a moving route using a 3D map; a determination unit to determine whether the 3D route guidance system is located within a predetermined distance from the GP based on the distance information; and a view angle changing unit to change a view angle for guiding a route for the GP depending on whether the route guidance system is located within the predetermined distance from the GP.

According to another aspect of the present invention, there is provided a view angle changing method in a 3D route guidance system including: obtaining distance information from a current location to a GP of the 3D route guidance system which guides a moving route using a 3D map; determining whether the 3D route guidance system is located within a predetermined distance from the GP based on the distance information; and changing a view angle for guiding a route with respect to the GP depending on whether the route guidance system is located within the predetermined distance from the GP.

Advantageous Effects

According to the present invention, it may be possible to provide a view angle changing apparatus and view angle changing method which changes a view angle for a guide point (GP) according to a distance from a current location to the GP in a three- dimensional (3D) route guidance system.

According to the present invention, it may be possible to provide a view angle changing apparatus and view angle changing method to improve visibility and recognition for a GP using information such as a current location of a user, a speed, and a remaining distance received from a global positioning system (GPS) using route search data and guiding information in a 3D route guidance system.

According to the present invention, it may be possible to provide a view angle changing apparatus and view angle changing method which can improve recognition for a GP for a user by altering a perspective angle and a zoom level according to a guidance distance and guidance circumstances in a 3D route guidance system.

Brief Description of Drawings

FIG. 1 is a diagram illustrating an example of a display mode which guides a route with respect to a guide point (GP) in a route guidance system using a conventional 3D map; FIG. 2 is a diagram illustrating a configuration of a view angle change apparatus in a three dimensional (3D) route guidance system according to example embodiments; FIG. 3 is a diagram illustrating a configuration of a view angle changing unit; FIG. 4 is a diagram illustrating an example of guiding a route at a changed view angle according to a remaining distance when a user enters into a GP;

FIG. 5 is a diagram illustrating an example of guiding a route at a changed view angle which is changed according to a remaining distance when a user enters into a GP; FIG. 6 is a diagram illustrating an example of displaying a route with respect to a GP when it is difficult to restore a distance to a next GP into an original 3D state after a route guidance system passes through the GP;

FIG. 7 is a diagram illustrating an example of displaying a route for a guide point in sections of routes with linear characteristics according to example embodiments;

FIG. 8 is a flowchart illustrating a view angle changing method in a 3D route guidance system according to example embodiments; and

FIG. 9 is a diagram illustrating an example of changing of a view angle.

Best Mode for Carrying Out the Invention

Hereinafter, a view angle changing method in a three dimensional (3D) route guidance system will be described in detail by referring to accompanied drawings according to example embodiments.

FIG. 2 is a diagram illustrating a configuration of a view angle change apparatus in a 3D route guidance system according to example embodiments.

Referring to FIG. 2, a view angle change apparatus 200 may include a distance information obtaining unit 210, a determination unit 220, a view angle changing unit 230, a display unit 240, a database 250, and a view angle establishment unit 260.

The distance information obtaining unit 210 may obtain distance information from a current location of a route guidance system to a guide point (GP), the route guidance system guiding a moving route. Specifically, the GP is a guiding point that does not include sections of routes with linear characteristics, such as underground roads, tunnels, left-turns, right-turns, and U-turns. Consequently, the distance information obtaining unit 210 may obtain the distance information from the current location to the GP via the global positioning system (GPS) (not shown) in the route guidance system.

The determination unit 220, based on the distance information collected as described above, may determine whether the route guidance system is within a predetermined distance from the GP. As an example, when the predetermined distance is 500 meters, the determination unit 220, may determine whether the route guidance system is located within about 500 meters from the GP based on the obtained distance information. Also, the determination unit 220 may determine whether the GP is sections of routes with linear characteristics. The sections of routes with linear characteristics may include crossroads, underground roads, entrances for expressways, rest areas, and tunnels.

The view angle changing unit 230 may change a view angle for route guidance for the GP depending on whether the route guidance system is located within the predetermined distance from the GP. Specifically, when the GP is not sections of routes with linear characteristics, the view angle changing unit 230 may change the view angle for the GP according to the current location of the route guidance system to the GP. Also, the view angle changing unit 230 may change the view angle for guiding the route for the GP within a range of 0 degrees to 180 degrees depending on whether the route guidance system is located within the predetermined distance from the GP.

Also, the view angle changing unit 230 may change a zoom level for route guidance for the GP as well as the view angle depending on whether the route guidance system is located within the predetermined distance from the GP.

As an example, the view angle changing unit 230 may change a first view angle to a second view angle when the route guidance system is located within the predetermined distance from the GP, and may change the second view angle to the first view angle when the route guidance system is beyond the predetermined distance from the GP.

Specifically, when the driver of a vehicle uses the route guidance system in the vehicle while sitting in the vehicle, the first view angle may be a view angle according to an eye-level of the driver while the driver is sitting in the vehicle.

When a user of the route guidance system is not capable of viewing a left-turn, a right-turn, and a crossroad due to obstacles such as buildings while the user of the route guidance system is driving a vehicle or is walking, the second view angle may be at a view angle higher than the first view angle since a route for the GP may be viewed from a height higher than the buildings. As an example, the second view angle may be a view angle according to circumstances such as a case of looking down the route for the GP from a bird's eye view.

As described, the view angle changing unit 200 according to the present invention may change a view angle to a most appropriate view angle for recognizing a

GP for the user not to recognize the GP due to the GP being obstructed by the buildings when the vehicle is located in the GP of sections such as in a left-turn, a right-turn, a u- turn, and the like, not sections of a route with linear characteristics.

FIG. 3 is a diagram illustrating a configuration of a view angle changing unit. Referring to a view angle changing unit 230 may include a calculation unit 310 and a changing unit 320.

The calculation unit 310 may calculate a view angle or a map scale for guiding a route for a GP depending on whether a route guidance system is located within a predetermined distance from the GP. That is, the calculation unit 310 may calculate the view angle or the map scale which are capable of enhancing user's recognition for the GP from a guiding view point according to remaining distances and times from a current location of the route guidance system to the GP. Here, the guiding view point is a starting reference point which guides the user indicating that the route guidance system has come within a predetermined distance from the GP. Also, the calculation unit 310 may calculate an optimal view angle or an optimal map scale based on distances and times at a guidance termination point, to guide the user indicating that the route guidance system is located away from the GP by the predetermined distance. The guidance termination point guides the user indicating that the route guidance system is located away from the GP by the predetermined distance. The changing unit 320 may change a view angle or a map scale for guiding a route for the GP according to the calculated view angle or map scale.

As an example, when the map scale is low or when an area being displayed is large, the changing unit 320 may change the view angle, since the GP may not be viewed due to the GP being obstructed by buildings, the changing unit 320 may change a view angle for guiding the route for the GP into a greater view angle according to the calculated view angle.

The view angle changing unit 230 may change a perspective angle of the GP based on a distance from the current location of the route guidance system to the GP, a moving speed, and time information. The view angle change unit 230 may maintain a perspective angle of the GP when the distance to the GP is within a predetermined distance after the route guidance system passes through the GP. The display unit 240 of FIG. 2 may display a route for the GP according to the changed view angle. That is, the display unit 240 may display the route for the GP at the first view angle or at the second view angle depending on whether the route guidance system is located within a predetermined distance from the GP.

When the route guidance system is located beyond the predetermined distance from the GP and before the route guidance system passes through the GP, the display unit 240 may display the route at the first view angle.

When the route guidance system is located within the predetermined distance from the GP and before the route guidance system passes through the GP, the display unit 240 may display the route at the second view angle. As an example, when the route guidance system is located beyond the predetermined distance from the GP after passing through the GP, the display unit 240 may display the route for the GP at the first view point, before passing through the GP.

As an example, when the route guidance system is located within the predetermined distance from the GP after passing through the GP, the display unit 240 may display the route for the GP by maintaining the perspective angle.

The database 250 of FIG. 2 may record and maintain various types of data which are required for operations of the view angle changing apparatus 200, such as various types of three dimensional map data, route data for a GP depending on a view angle, route data for a GP depending on a perspective angle, the predetermined distance, distance establishment information, and the like.

The view angle establishment unit 260 may be established with an angle from the user of the route guidance system to change the view angle for the GP. That is, the view angle establishment unit 260 may receive angle information from the user to change the view angle for the GP so as to accurately recognize the route for the GP, and establish the view angle to be changed according to the received angle information.

As an example, the view angle establishment unit 260 may receive angle information of 90 degrees from the user to change the view angle for the GP, and may establish the view angle to be changed into 90 degrees.

FIG. 4 is a diagram illustrating an example of guiding a route at a changed view angle according to a remaining distance when a user enters into a GP.

Referring to FIG. 4, it is illustrated that a screen 410 for a first entrance route may display a route for a GP at a first view angle when a remaining distance from a current location of the route guidance system to the GP is about 610 meters.

A screen 420 for a second entrance route may display a route for a GP at a second view angle when a remaining distance from a current location of the route guidance system to the GP is about 500 meters. A screen 430 for a third entrance route may display a route for a GP at a third view angle when a remaining distance from a current location of the route guidance system to the GP is about 410 meters.

A screen 440 for a fourth entrance route may display a route for a GP at a fourth view angle when a remaining distance from a current location of the route guidance system to the GP is about 350 meters.

As described above, according to the view angle changing unit 200 in a 3D route guidance system of the present invention, a user may clearly recognize a GP since a view angle is changed according to a remaining distance and time information to the GP and a location on a map for the GP is effectively displayed in a 3D state. FIG. 5 is a diagram illustrating an example of guiding a route at a changed view angle which is changed according to a remaining distance when a user arrives at a GP.

Referring to FIG. 5, when a remaining distance from a current location of the route guidance system to the GP is zero, since the current location of the guidance route system is the same as the GP, a first screen 510 illustrating forwarding route guidance and a second screen 520 illustrating forwarding route guidance represent screens which change a first view angle to a second view angle to easily recognize the GP and display the route for the GP at the changed second view angle. When a remaining distance from a current location of the route guidance system to a next GP is 960 meters or 980 meters, since the user is 500 meters away which is a range of starting to recognize the next GP, a third screen 530 illustrating forwarding route guidance and a fourth screen 540 illustrating forwarding route guidance represent screens which change the second view angle to the first view angle and display screens guiding the route for the GP at the first view angle.

As described above, the view angle changing unit 200 in a 3D route guidance system of the present invention may accurately and recognizably display the GP with a merit of a 3D display by restoring into an original 3D state and displaying the 3D display when the route guidance system continues guidance to the next GP after passing through the GP.

FIG. 6 is a diagram illustrating an example of displaying a route with respect to a GP when it is difficult to restore a distance to a next GP into an original 3D state after a route guidance system passes through the GP. Referring to FIG. 6, a first route guidance screen 610 illustrates a difficult case to restore a distance to a next GP into an original 3D state after passing through a GP. A route for the next GP is displayed by maintaining a changed view angle or a changed perspective angle.

A second route guidance screen 620 displays the route for the GP by maintaining the changed view angle or perspective angle when a remaining distance to the next GP is about 500 meters after passing through the GP.

FIG. 7 is a diagram illustrating an example of displaying a route for a GP in sections of routes with linear characteristics according to example embodiments.

Referring to FIG. 7, a route guidance screen 700 displaying a GP in sections of routes with linear characteristics may display the route for the GP by maintaining a basic type of 3D map data without changing a view angle, a perspective angle, or a zoom level in the sections of routes with linear characteristics.

As described above, the view angle changing apparatus 200 of FIG. 2 may provide a user with a background having a 3D effect and may provide a wider range of view by displaying a route for a GP of a basic type of 3D map data since a higher level of recognition is not required for the user when the GP is a section of a route with linear characteristics.

FIG. 8 is a flowchart illustrating a view angle changing method in a 3D route guidance system according to example embodiments. Referring to FIGS. 2 through 8, the view angle changing apparatus 200 may obtain distance information to a GP from a current location of a route guidance system in operation S 810. In operation S 820, the view angle changing apparatus 200 may determine whether the route guidance system is located within a predetermined distance from the GP based on the distance information.

Also, in operation S820, the view angle changing apparatus 200 may determine whether the GP is a section of a route with linear characteristics. The section of the route with linear characteristics may include crossroads, underground roads, tunnels, left-turns, right-turns, U-turns, and the like.

In operation S830, the view angle changing apparatus 200 may change a view angle for guiding the route for the GP depending on whether the route guidance system is located within the predetermined distance from the GP. Specifically, the view angle changing apparatus 200 may change the view angle for guiding the route for the GP within a range of 0 degrees to 180 degrees depending on whether the route guidance system is located within the predetermined distance from the GP in operation S830.

Also, in operation S830, the view angle changing apparatus may further include an operation of being established with an angle from the user of the route guidance system to change the view angle for the GP, and may change the view angle for guiding the route for the GP into the established view angle depending on whether the route guidance system is located within the predetermined distance from the GP.

As an example, in operation S830, the view angle changing apparatus 200 may change or maintain the view angle for the GP according to a distance or circumstances from the current location of the route guidance system to the GP when the GP is not a section of a route with linear characteristics, as illustrated in FIGS. 4 through 7.

As an example, in operation S830, the view angle changing apparatus 200 may change a view angle or a perspective view for the GP by considering a remaining distance, a moving speed, and time information from a current location of the route guidance system to the GP.

As an example, in operation S830, the view angle changing apparatus 200 may change the view angle or a zoom level for guiding the route for the GP depending on whether the route guidance system is located within the predetermined distance from the GP. As an example, when the map scale is low or when an area being displayed is large, the view angle changing apparatus 200 may change the view angle into a greater view angle in operation S830 since the GP may not be viewed due to the GP being obstructed by buildings.

As an example, in operation S830, the view angle changing apparatus 200 may change a first view angle to a second view angle when the route guidance system is located within the predetermined distance from the GP, and may change the second view angle to the first view angle when the route guidance system passes through the

GP and is beyond the GP by the predetermined distance.

FIG. 9 is a diagram illustrating an example of an operation of changing of a view angle.

Referring to FIGS. 2 through 9, the view angle changing apparatus 200 may calculate a view angle or a map scale for guiding a route for a GP depending on whether a route guidance system is located within a predetermined distance in operation S910. That is, the view angle changing apparatus 200 may calculate the view angle or the map scale which are capable of enhancing a user's recognition for the GP from a guiding view point according to remaining distances and times from a current location of the route guidance system to the GP in operation S910. Here, the guiding view point is a starting reference point which guides the user for when the route guidance system has come within a predetermined distance from the GP. Also, the view angle changing system 200 may calculate an optimal view angle or an optimal map scale for guiding the route for the GP according to distances and times at a guidance termination point. The guidance termination point guides the user indicating that the route guidance system is away from the GP by the predetermined distance.

In operation S920, the view angle changing apparatus 200 may change the view angle or the map scale for guiding the route for the GP based on the calculated view angle or the map scale. As an example, when the map scale is low or when an area being displayed is large, the view angle changing unit 200 may change the view angle into a greater view angle in operation S920 since the GP may not be viewed due to the GP being obstructed by buildings.

In operation S840, the view angle changing unit 200 may display the route for the GP according to the changed view angle. Also, in operation S840, the view angle changing unit 200 may display the route for the GP at appropriate view angles as illustrated in FIGS. 4 through 7, depending on whether the route guidance system is located within the predetermined distance from the GP.

As an example, the view angle changing unit 200 may display the route for the GP by maintaining the change view angle or the perspective angle when a remaining distance to a next GP after passing through the GP is within the predetermined distance from the GP.

As described above, according to the view angle changing method in the 3D route guidance system of the present invention, a user may accurately recognize a GP since a view angle for guiding a route for the GP is changed according to a distance from a current location of a route guidance system and the route for the GP is displayed according to the changed view angle.

The view angle changing method in the route guidance system using a 3D map according to the above-described example embodiments may be recorded in computer- readable media including program instructions to implement various operations embodied by a computer. The media may also include, alone or in combination with the program instructions, data files, data structures, and the like. Examples of computer-readable media include magnetic media such as hard disks, floppy disks, and magnetic tape; optical media such as CD ROM disks and DVD; magneto-optical media such as optical disks; and hardware devices that are specially configured to store and perform program instructions, such as read-only memory (ROM), random access memory (RAM), flash memory, and the like. The media may also be a transmission medium such as optical or metallic lines, wave guides, and the like, including a carrier wave transmitting signals specifying the program instructions, data structures, and the like. Examples of program instructions include both machine code, such as produced by a compiler, and files containing higher level code that may be executed by the computer using an interpreter. The described hardware devices may be configured to act as one or more software modules in order to perform the operations of the above- described embodiments of the present invention.

The foregoing descriptions of specific embodiments of the present invention have been presented for purposes of illustration and description. They are not intended to be exhaustive or to limit the invention to the precise forms disclosed, and obviously many modifications and variations are possible in light of the above teaching.

Therefore, it is intended that the scope of the invention be defined by the claims appended thereto and their equivalents.

Claims

1. A view angle change apparatus in a three dimensional (3D) route guidance system, the apparatus comprising: a distance information obtaining unit to obtain distance information from a current location to a guide point (GP) of the 3D route guidance system which guides a moving route using a 3D map; a determination unit to determine whether the 3D route guidance system is located within a predetermined distance from the GP based on the distance information; and a view angle changing unit to change a view angle for guiding a route for the

GP depending on whether the route guidance system is located within the predetermined distance from the GP.

2. The apparatus of claim 1, wherein the view angle changing unit changes the view angle for guiding the route with respect to the GP ranging between 0 degrees to

180 degrees depending on whether the 3D route guidance system is located within the predetermined distance.

3. The apparatus of claim 1, further comprising: a view angle establishment unit to receive, from a user of the 3D route guidance system, an angle for changing the view angle with respect to the GP.

4. The apparatus of claim 1, wherein the view angle changing unit further comprises: a display unit to change a first view angle to a second view angle when the 3D route guidance system is located within the predetermined distance from the GP, to change the second view point to the first view point when the 3D route guidance system passes through the GP to be beyond the predetermined distance, and to display a route for the GP at the first view angle or at the second view angle depending on whether the 3D route guidance system is located within the predetermined distance.

5. The apparatus of claim I₅ wherein the view angle changing unit changes the view angle or a zoom level for guiding the route with respect to the GP depending on whether the 3D route guidance system is located within the predetermined distance from the GP.

6. The apparatus of claim 1 , wherein the view angle changing unit comprises: a calculation unit to calculate the view angle or a map scale for guiding the route with respect to the GP depending on whether the 3D route guidance system is located within the predetermined distance; and a changing unit to change the view angle or the map scale for guiding the route with respect to the GP based on the calculated view angle or map scale.

7. The apparatus of claim 4, wherein the display unit displays the route with respect to a next GP by maintaining a perspective angle when a distance to the next GP is within a predetermined distance after the 3D route guidance system passes through the GP.

8. The apparatus of claim 1, wherein the view angle changing unit changes a perspective angle with respect to the GP by referring to a distance from the current location of the 3D route guidance system to the GP, a moving speed, and time information.

9. The apparatus of claim 1, wherein the view angle changing unit determines whether the GP is a section of a route with linear characteristics, and the view angle changing unit changes the view angle for the GP based on the distance from the current location of the 3D route guidance system to the GP when the GP is not the straight guidance section.

10. The apparatus of claim 9, wherein the straight guidance section comprises a crossroad, a subway, an entrance of an expressway, a rest area, and a tunnel.

11. A view angle changing method in a 3D route guidance system, the method comprising: obtaining distance information from a current location to a GP of the 3D route guidance system which guides a moving route using a 3D map; determining whether the 3D route guidance system is located within a predetermined distance from the GP based on the distance information; and changing a view angle for guiding a route with respect to the GP depending on whether the route guidance system is located within the predetermined distance from the GP.

12. The method of claim 11, wherein the changing of the view angle for guiding a route with respect to the GP changes a view angle for guiding the route with respect to the GP ranging from 0 degrees to 180 degrees depending on whether the 3D route guidance system is located within the predetermined distance.

13. The method of claim 11 , further comprising: receiving an angle for changing the view angle with respect to the GP from a user of the 3D route guidance system.

14. The method of claim 11 , wherein the changing of the view angle for guiding the route with respect to the GP further comprises: changing a first view angle to a second view angle when the 3D route guidance system is located within the predetermined distance from the GP; changing the second view point to the first view point when the 3D route guidance system passes through the GP to be beyond the predetermined distance; and displaying a route with respect to the GP at the first view angle or at the second view angle depending on whether the 3D route guidance system is located within the predetermined distance.

15. The method of claim 11 , wherein the changing of the view angle for guiding the route with respect to the GP changes a view angle or a zoom level for guiding the route with respect to the GP depending on whether the 3D route guidance system is located within the predetermined distance from the GP.

16. The method of claim 11 , wherein the changing of the view angle for guiding the route with respect to the GP comprises: calculating a view angle or a map scale for guiding the route with respect to the GP depending on whether the 3D route guidance system is located within the predetermined distance; and changing a view angle or a map scale for guiding the route with respect to the GP according to the calculated view angle or map scale.

17. The method of claim 14, wherein the displaying of the route with respect to the GP displays the route with respect to a next GP by maintaining a perspective angle when a distance to the next GP is within the predetermined distance after the 3D route guidance system passes through the GP.

18. The method of claim 11 , wherein the changing of the view angle for guiding the route with respect to the GP changes the perspective angle with respect to the GP by referring to a remaining distance from the current location of the 3D route guidance system to the GP, a moving speed, and time information.

19. The method of claim 11 , further comprising: determining whether the GP is a section of a route with linear characteristics, wherein the changing of the view angle for guiding the route with respect to the GP changes the view angle with respect to the GP according to the distance from the current location of the 3D route guidance system to the GP when the GP is not the straight guidance section.

20. The method of claim 19, wherein the straight guidance section comprises a crossroad, a subway, an entrance of an expressway, a rest area, and a tunnel.

21. At least one computer-readable storage medium storing instructions for implementing the method of any one of claims 11 through 20.