WO2015109885A1

WO2015109885A1 - Navigation map displaying method and system

Info

Publication number: WO2015109885A1
Application number: PCT/CN2014/090989
Authority: WO
Inventors: 吴朝良
Original assignee: 高德信息技术有限公司
Priority date: 2014-01-24
Filing date: 2014-11-13
Publication date: 2015-07-30
Also published as: CN104807467A; CN104807467B

Abstract

Provided are a navigation map displaying method and system. The method comprises: conducting modeling in advance according to two-dimensional vector data of a road and the pre-set height of the road to obtain a three-dimensional road model corresponding to the road, compiling the three-dimensional road model into three-dimensional vector data corresponding to the road, and storing the three-dimensional road model and the three-dimensional vector data corresponding to the road (200); acquiring the three-dimensional vector data and the three-dimensional road model corresponding to the road to be displayed from the pre-stored three-dimensional road vector data and three-dimensional road models (201); and according to the three-dimensional vector data and the three-dimensional road model corresponding to the road to be displayed, conducting rendering in a navigation map to obtain a three-dimensional type road to be displayed (202). By means of the method and system, a three-dimensional road can be displayed in a navigation map. Thus, roads with stereoscopic staggered structure, such as overpasses or viaducts, can be displayed in a form of three-dimensional structure, and the staggered relationship between roads becomes relatively clear, thereby improving the navigation guidance effect.

Description

Method and system for displaying navigation map

This application claims priority to Chinese Patent Application No. 201410036424.3, entitled "A Method and System for Displaying Navigation Maps", filed on January 24, 2014, the entire contents of which is incorporated herein by reference. In the application.

Technical field

The present invention relates to the field of computer applications, and in particular, to a method and system for displaying a navigation map.

Background technique

At present, the navigation maps of various navigation devices are mainly in two-dimensional mode. In the two-dimensional mode, the navigation map presented to the user is a two-dimensional figure, that is, each road in the navigation map (including a road with a three-dimensional staggered structure such as an overpass or a viaduct) and a road element (eg, a street sign) , buildings on both sides of the road or flower beds, etc.) are two-dimensional graphics.

In the navigation process, the roads and other road elements in the electronic map are two-dimensional graphics. For roads with a three-dimensional staggered structure such as an overpass or a viaduct, the two-dimensional graphics usually use shadows to represent the staggered relationship of the road. As shown in FIG. 1 , it can be seen that in the navigation process, it is difficult to faithfully reflect the actual staggered relationship between the roads in the electronic map, the navigation effect is poor, and the user experience is low.

Summary of the invention

In order to solve the above technical problem, an embodiment of the present invention provides a method and apparatus for displaying a navigation map to display a three-dimensional form of a navigation map, and improve a navigation effect and a user experience of the navigation map.

According to a first aspect of the embodiments of the present invention, a method for displaying a navigation map is disclosed, which is modeled in advance according to two-dimensional vector data of a road and a preset height of a road, to obtain a three-dimensional road model corresponding to the road; The three-dimensional road model is compiled into three-dimensional vector data corresponding to the road; and a three-dimensional road model and three-dimensional vector data corresponding to the road are stored; the method includes:

Obtaining three-dimensional vector data and a three-dimensional road model corresponding to the road to be displayed from the pre-stored three-dimensional vector data and the three-dimensional road model, where the road to be displayed is a road falling within the screen of the navigation device;

According to the three-dimensional vector data and the three-dimensional road model corresponding to the road to be displayed, the navigation map is rendered to obtain a three-dimensional road to be displayed.

According to a second aspect of the embodiments of the present invention, a navigation system display system includes: a three-dimensional road establishing device, a storage device, and a three-dimensional display device;

The three-dimensional road establishing device comprises a three-dimensional road model establishing module and a three-dimensional road vector data establishing module;

a three-dimensional road model establishing module, configured to model a three-dimensional road model corresponding to the road according to two-dimensional vector data of the road and a preset height of the road;

a three-dimensional road vector data establishing module, configured to compile a three-dimensional road model into three-dimensional vector data corresponding to the road;

a storage device, configured to store a three-dimensional road model and three-dimensional vector data corresponding to the road;

The three-dimensional display device includes: a first acquisition module and a first rendering module;

The first acquiring module is configured to acquire three-dimensional vector data and a three-dimensional road model corresponding to the road to be displayed from the three-dimensional vector data and the three-dimensional road model pre-stored by the storage device, where the road to be displayed falls into the navigation device screen Road within the scope;

The first rendering module is configured to perform rendering in the navigation map according to the three-dimensional vector data and the three-dimensional road model corresponding to the road to be displayed, to obtain a road to be displayed in a three-dimensional form.

In the technical solution of the present invention, a corresponding three-dimensional road model and three-dimensional vector data are established for each road in advance, and stored; when the electronic map is opened for navigation, the navigation is obtained from the pre-stored three-dimensional road model and three-dimensional vector data. The 3D road model and the 3D vector data of the road within the device screen range, and the 3D road to be displayed is rendered in the navigation map according to the acquired 3D road model and the 3D vector data. By adopting the technical scheme of the invention, three-dimensional roads can be displayed in the navigation map, so that the roads of the three-dimensional staggered structure such as an overpass or a viaduct can be displayed in a three-dimensional structure, and the staggered relationship between the road and the road is clearer and improved. The navigation guide effect.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings to be used in the embodiments will be briefly described below. Obviously, the drawings in the following description are only some of the present invention. Embodiments, for those of ordinary skill in the art, without creative labor Further drawings can also be obtained from these drawings.

1 is a view showing a display effect of a flyover in a two-dimensional navigation map in the prior art;

2 is a flow chart of an embodiment of a method for displaying a navigation map according to the present invention;

3 is a diagram showing the effect of the overpass in the three-dimensional navigation map of the present invention;

4 is a flow chart of another embodiment of a method for displaying a navigation map according to the present invention;

FIG. 5 is a flowchart of another embodiment of a method for displaying a navigation map according to the present invention; FIG.

6 is a diagram showing a guide route on a flyover and an overpass in the present invention and a display effect of a current position of the vehicle in a three-dimensional navigation map;

7 is a structural diagram of an embodiment of a navigation map display system according to the present invention;

FIG. 8 is a structural diagram of another embodiment of a navigation map display system according to the present invention; FIG.

FIG. 9 is a structural diagram of another embodiment of a navigation map display system according to the present invention.

detailed description

Embodiments of the present invention provide a method and system for displaying a navigation map. Firstly, based on the two-dimensional vector data of each road and the preset height of each road, a three-dimensional road model corresponding to each road is established, in particular, a three-dimensional road model of a viaduct or an overpass is established. The 3D road model of each road is then compiled into 3D vector data for each road. When the 3D road model and 3D vector data of the road are loaded into the rendering engine for rendering, the road of the three-dimensional structure can be displayed on the navigation map, especially the three-dimensional structure of the viaduct or the overpass.

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Embodiment 1

Please refer to FIG. 2 , which is a flowchart of an embodiment of a method for displaying a navigation map according to the present invention, including the following steps:

Step 200: Perform modeling according to the two-dimensional vector data of the road and the preset height of the road, obtain a three-dimensional road model corresponding to the road, and compile the three-dimensional road model into three-dimensional vector data corresponding to the road. And storing a three-dimensional road model and three-dimensional vector data corresponding to the road (such as latitude and longitude information, road name, height value, etc.);

In this step 200, storing the three-dimensional road model and the three-dimensional vector data corresponding to the road may be implemented by, but not limited to, the following: the road ID or the index relationship between the name and the data file may be established, for example, the data file corresponds to the ID of the road. Or name naming, if the 3D road model and 3D vector data of a road are obtained, the 3D road model and the 3D vector data of the road may be obtained from the file named ID or name of the road according to the ID or name of the road. .

Step 201: Obtain three-dimensional vector data and a three-dimensional road model corresponding to the road to be displayed from the pre-stored three-dimensional vector data and the three-dimensional road model, where the road to be displayed is a road falling within the screen of the navigation device;

Step 202: Perform rendering in the navigation map according to the three-dimensional vector data and the three-dimensional road model corresponding to the road to be displayed, to obtain a road to be displayed in a three-dimensional form.

As shown in Figure 3, it shows the effect of the overpass in the navigation map. Compared with the display effect of the overpass in FIG. 1 in the navigation map, the display effect of the present invention can better reflect the staggered relationship between the roads in the overpass, and has stereoscopic vision, thereby improving the guiding property of the navigation device.

In step 202, the rendering in the navigation map can be performed according to the existing rendering technology, and the present invention does not limit the rendering manner of the rendering engine.

It should be noted that in the present invention, the existing 3D modeling tool can be used to establish a three-dimensional road model for each road. For example, the 2D vector data of the road is first imported into the 3D modeling tool to present a 2D road line for each road in the 3D modeling tool. Then, based on the height information of each road collected in the field, a height value is set on the two-dimensional road line of each road, so that the two-dimensional road line editing of each road is expanded into a two-dimensional road surface, and for each The thickness of the two-dimensional road surface of the road is made. Finally, according to the requirements of aesthetics, the process of collapse, editing, bridging, over-smoothing or model reduction is performed to obtain a three-dimensional road model for each road.

In order to further improve the display effect of the navigation map, it is also possible to further supplement the three-dimensional model of the road element with a three-dimensional model of the road element, such as a three-dimensional model such as a flower pot, a pool, a landmark, a street sign and a street lamp.

After the 3D road model of each road is established, the 3D road model of each road needs to be further compiled into 3D vector data, for example, compiled into the mqo standard format.

In order to further enhance the stereoscopic effect of the three-dimensional road, a more preferable implementation method is: before the three-dimensional road model is compiled into three-dimensional vector data, the three-dimensional road model is subjected to shadow baking, and then the three-dimensional road after the shadow baking process is performed. The model is compiled into three-dimensional vector data.

It should be noted that, in addition to the navigation engine in the navigation device, the execution body of the present invention may also be a dedicated function module in the navigation device for completing the three-dimensional display of the navigation map.

By adopting the technical scheme of the invention, three-dimensional roads can be displayed in the navigation map, so that the roads of the three-dimensional staggered structure such as an overpass or a viaduct can be displayed in a three-dimensional structure, and the staggered relationship between the road and the road is clearer and improved. The navigation guide effect.

Embodiment 2

Preferably, since the number of roads in the navigation map is very large, if a three-dimensional road model is established for all the roads, a large amount of storage space may be required. To save storage space, the embodiment of the present invention may not establish a road with a simple structure. The three-dimensional road model can still be displayed in two-dimensional form in the navigation map. For a road with a complex structure such as a viaduct or an overpass, it is necessary to express a road-to-road relationship, and a corresponding three-dimensional road model is established in advance.

In view of the above, the present embodiment provides a method for taking into consideration the two-dimensional form of some roads and the three-dimensional form of other roads, which differs from the first embodiment in that a three-dimensional vector of the road to be displayed cannot be obtained. The data and the three-dimensional road model further acquire two-dimensional vector data of the road to be displayed. Please refer to FIG. 4 , which is a flowchart of another embodiment of a method for displaying a navigation map according to the present invention, including the following steps:

Step 400: Modeling a three-dimensional road model corresponding to the road according to the two-dimensional vector data of the road and the preset height of the road, and compiling the three-dimensional road model into three-dimensional vector data corresponding to the road, and Storing a three-dimensional road model and three-dimensional vector data corresponding to the road;

Step 401: Determine whether the three-dimensional vector data and the three-dimensional road model corresponding to the road to be displayed can be obtained from the pre-stored three-dimensional vector data and the three-dimensional road model, and if yes, proceed to step 402, otherwise, proceed to step 404;

For example, for roads in which three-dimensional vector data and three-dimensional road models are stored in advance, the IDs of these roads may be recorded in a list in advance. By judging whether there is an ID of the road to be displayed in the list, it can be known whether the three-dimensional vector data and the three-dimensional road model of the road to be displayed can be obtained.

Step 402: Obtain three-dimensional vector data and a three-dimensional road model corresponding to the road to be displayed from the pre-stored three-dimensional vector data and the three-dimensional road model;

Step 403: According to the three-dimensional vector data and the three-dimensional road model corresponding to the road to be displayed, Rendering in the navigation map, obtaining the road to be displayed in three dimensions, ending the process;

Step 404: Obtain two-dimensional vector data of the road to be displayed, and perform rendering in the navigation map according to the two-dimensional vector data of the road to be displayed to obtain a two-dimensional road to be displayed, and end the process.

By adopting the technical solution of the present invention, on the one hand, a three-dimensional road can be displayed in a navigation map, so that a road with a three-dimensional staggered structure such as an overpass or a viaduct can be displayed in a three-dimensional structure, and the staggered relationship between the road and the road is relatively Clearly, the navigation guidance effect is improved; on the other hand, for a road with a relatively simple structure, it is still displayed in two dimensions, and it is not necessary to establish a three-dimensional model of the road in advance, thereby saving storage space.

Embodiment 3

In order to further improve the navigation guidance effect, in addition to displaying the road in a three-dimensional form in the navigation map, the third embodiment of the present invention can also display the guidance route on the target road in a three-dimensional form in the navigation map, and two-dimensionally The guiding route of the form is different, and the guiding route of the three-dimensional form is not flat, but has a certain height. The difference between this embodiment and the first embodiment is that after displaying the three-dimensional form of the road, the three-dimensional form of the guiding route is further displayed on the target road in the three-dimensional form.

Please refer to FIG. 5 , which is a flowchart of another embodiment of a method for displaying a navigation map according to the present invention. Includes the following steps:

Step 500: Modeling a two-dimensional road model corresponding to the road according to the two-dimensional vector data of the road and the preset height of the road, and compiling the three-dimensional road model into three-dimensional vector data corresponding to the road, and Storing a three-dimensional road model and three-dimensional vector data corresponding to the road;

Step 501: The two-dimensional vector data of the guiding route of the road is loaded into a three-dimensional road model corresponding to the road in advance, and a preset height corresponding to the road is extracted from the three-dimensional road model, and the two-dimensional a combination of vector data and the preset height as three-dimensional vector data of a guiding route of the road, and storing three-dimensional vector data of a guiding route of the road;

Step 502: Obtain three-dimensional vector data and a three-dimensional road model corresponding to the road to be displayed from the pre-stored three-dimensional vector data and the three-dimensional road model, and the road to be displayed is a road falling within the screen of the navigation device;

Step 503: Perform rendering in the navigation map according to the three-dimensional vector data and the three-dimensional road model corresponding to the road to be displayed, to obtain a road to be displayed in a three-dimensional form;

Step 504: Obtain three-dimensional vector data of a guiding route of the target road from the three-dimensional vector data of the guiding route of the pre-stored road, where the target road refers to a screen falling into the navigation device included in the planned navigation path. Inside the road;

Step 505: Perform rendering in the navigation map according to the three-dimensional vector data of the guiding route of the target road to obtain a guiding route of the target road in a three-dimensional form.

After the 3D vector data of the guiding route of the target road is loaded into the rendering engine and rendered by the rendering engine, the guiding route can be displayed on the road surface of the target road in the navigation map.

Further, in the navigation map, the current position of the navigation vehicle can also be drawn on the guiding route of the target road.

Preferably, in order to satisfy the user's real-time knowledge of the location of the navigation vehicle, after step 505, the method further includes: positioning the navigation vehicle, and determining a foothold point of the navigation vehicle to the guiding route of the target road, and The navigation vehicle is drawn at a footing point.

Wherein, as shown in FIG. 6, it not only displays the guiding route on the overpass and the overpass, but also draws the current position of the navigation vehicle on the guiding route. Among them, the arrow in FIG. 6 is used to mark the current position of the navigation vehicle, and the thick line passing through the arrow is the guiding route on the overpass.

It can be seen from the above embodiment that the navigation vehicle can display a three-dimensional road when driving, especially when driving to an overpass or viaduct road, which can truly reflect the staggered relationship between the roads, improve the guiding effect of the navigation map and the user. Experience.

Moreover, the three-dimensional vector data based on the guiding route generates three-dimensional vector data, and according to the three-dimensional vector data of the guiding route, a guiding route with a height can be displayed on the three-dimensional road, so as to guide the path more intuitively for the user, further ensuring that the navigation vehicle can be accurate. On the navigation path.

Embodiment 4

Corresponding to the above-mentioned display method of the navigation map, the embodiment of the invention further provides a display system for the navigation map. Please refer to FIG. 7, which is a structural diagram of an embodiment of a navigation map display system according to the present invention. The system includes a three-dimensional road establishing device 71, a storage device 72, and a three-dimensional display device 73. The following describes the working principle of the device. Its internal structure and connection relationship.

The three-dimensional road building device 71 includes a three-dimensional road model establishing module 711 and a three-dimensional road vector data establishing module 712;

a three-dimensional road model establishing module 711, configured to perform a three-dimensional road model corresponding to the road according to the two-dimensional vector data of the road and the preset height of the road;

a three-dimensional road vector data establishing module 712, configured to compile a three-dimensional road model into three-dimensional vector data corresponding to the road;

a storage device 72, configured to store a three-dimensional road model and three-dimensional vector data corresponding to the road;

In the embodiment of the present invention, the storage device 72 stores the three-dimensional road model and the three-dimensional vector data corresponding to the road. For details, refer to the description in the first embodiment, and details are not described herein again.

The three-dimensional display device 73 includes: a first obtaining module 731 and a first rendering module 732,

The first obtaining module 731 is configured to obtain three-dimensional vector data and a three-dimensional road model corresponding to the road to be displayed from the three-dimensional vector data and the three-dimensional road model prestored by the storage device 72, and the road to be displayed falls within the range of the navigation screen. path of;

The first rendering module 732 is configured to perform rendering in the navigation map according to the three-dimensional vector data and the three-dimensional road model corresponding to the road to be displayed, to obtain a road to be displayed in a three-dimensional form.

Preferably, as shown in FIG. 8, the system further includes a three-dimensional guiding route establishing device 74 for pre-loading two-dimensional vector data of the guiding route of the road onto the three-dimensional road model corresponding to the road, from the three-dimensional Extracting a preset height corresponding to the road in the road model, and combining the two-dimensional vector data and the preset height as three-dimensional vector data of a guiding route of the road;

The storage device 72 is further configured to store three-dimensional vector data of a guiding route of the road;

The three-dimensional display device 73 further includes: a second obtaining module 733 and a second rendering module 734,

a second obtaining module 733, configured to acquire three-dimensional vector data of a guiding route of the target road from the three-dimensional vector data of the guiding route of the pre-stored road, where the target road refers to a road included in the planned navigation path Enter the road within the screen of the navigation device;

The second rendering module 734 is configured to perform rendering in the navigation map according to the three-dimensional vector data of the guiding route of the target road to obtain a guiding route of the target road in a three-dimensional form.

Further preferably, as shown in FIG. 9, the system further includes: a navigation vehicle drawing device 75,

The navigation vehicle drawing device 75 is configured to position the navigation vehicle, and determine a footing point of the guiding route of the current position of the navigation vehicle to the target road, and draw the navigation vehicle at the footing point.

Preferably, the system further includes a two-dimensional display device, if the first acquisition module 731 The three-dimensional vector data and the three-dimensional road model of the road to be displayed cannot be obtained, and the two-dimensional vector data of the road to be displayed is obtained, and the two-dimensional vector data of the road to be displayed is rendered in the navigation map to obtain a two-dimensional form to be displayed. the way.

Preferably, the three-dimensional road establishing device 71 further includes:

a shadow baking module, configured to perform shadow baking on the three-dimensional road model before the three-dimensional road vector data establishing module compiles the three-dimensional road model into three-dimensional vector data corresponding to the road;

The three-dimensional road vector data establishing module 712 is specifically configured to: compile the three-dimensional road model after the shadow baking process into three-dimensional vector data corresponding to the road.

It should be noted that those skilled in the art can understand that all or part of the process of implementing the foregoing embodiments can be completed by a computer program to instruct related hardware, and the program can be stored in a computer readable storage. In the medium, the program, when executed, may include the flow of an embodiment of the methods as described above. The storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

The method and apparatus for displaying a navigation map provided by the present invention are described in detail above. The principles and embodiments of the present invention are described herein with reference to specific embodiments. The description of the above embodiments is only for helping to understand the present invention. The method and its core idea; at the same time, those skilled in the art, according to the idea of the present invention, there will be changes in the specific implementation and application scope. In summary, the content of the specification should not be understood as Limitations of the invention.

Claims

A method for displaying a navigation map, characterized in that: modeling a two-dimensional vector data of a road and a preset height of a road in advance to obtain a three-dimensional road model corresponding to the road; compiling the three-dimensional road model into The three-dimensional vector data corresponding to the road; and storing a three-dimensional road model and three-dimensional vector data corresponding to the road; the method includes:

Obtaining three-dimensional vector data and a three-dimensional road model corresponding to the road to be displayed from the pre-stored three-dimensional vector data and the three-dimensional road model, where the road to be displayed is a road falling within the screen of the navigation device;

According to the three-dimensional vector data and the three-dimensional road model corresponding to the road to be displayed, the navigation map is rendered to obtain a three-dimensional road to be displayed.
The method according to claim 1, wherein the two-dimensional vector data of the guidance route of the road is previously loaded onto the three-dimensional road model corresponding to the road, and the three-dimensional road model is extracted from the three-dimensional road model a preset height, a combination of the two-dimensional vector data and the preset height as three-dimensional vector data of a guiding route of the road; and storing three-dimensional vector data of a guiding route of the road; the method further includes :

Obtaining three-dimensional vector data of a guiding route of the target road from the three-dimensional vector data of the guiding route of the pre-stored road, where the target road refers to a road that falls within the screen of the navigation device included in the planned navigation path ;

According to the three-dimensional vector data of the guiding route of the target road, rendering is performed in the navigation map to obtain a guiding route of the target road in three-dimensional form.
The method of claim 2, wherein the method further comprises:

The navigation vehicle is positioned and a foothold point of the navigation vehicle's current position to the guidance route of the target road is determined, and the navigation vehicle is drawn at the footing point.
The method according to any one of claims 1 to 3, wherein if the three-dimensional vector data and the three-dimensional road model of the road to be displayed are not acquired, the method further comprises:

Obtaining two-dimensional vector data of the road to be displayed, and rendering in the navigation map according to the two-dimensional vector data of the road to be displayed, to obtain a two-dimensional road to be displayed.
The method according to any one of claims 1 to 3, further comprising: before compiling the three-dimensional road model into three-dimensional vector data corresponding to the road, further comprising:

Performing a shadow baking on the three-dimensional road model;

Then, the three-dimensional road model is compiled into three-dimensional vector data corresponding to the road, specifically:

The three-dimensional road model after the shadow baking process is compiled into three-dimensional vector data corresponding to the road.
A display system for a navigation map, comprising: a three-dimensional road establishing device, a storage device, and a three-dimensional display device; wherein

The three-dimensional road establishing device comprises a three-dimensional road model establishing module and a three-dimensional road vector data establishing module;

a three-dimensional road model establishing module, configured to model a three-dimensional road model corresponding to the road according to two-dimensional vector data of the road and a preset height of the road;

a three-dimensional road vector data establishing module, configured to compile a three-dimensional road model into three-dimensional vector data corresponding to the road;

a storage device, configured to store a three-dimensional road model and three-dimensional vector data corresponding to the road;

The three-dimensional display device includes: a first acquisition module and a first rendering module;

The first acquiring module is configured to acquire three-dimensional vector data and a three-dimensional road model corresponding to the road to be displayed from the three-dimensional vector data and the three-dimensional road model pre-stored by the storage device, where the road to be displayed falls into the navigation device screen Road within the scope;

The first rendering module is configured to perform rendering in the navigation map according to the three-dimensional vector data and the three-dimensional road model corresponding to the road to be displayed, to obtain a road to be displayed in a three-dimensional form.
The system according to claim 6, wherein the system further comprises three-dimensional guidance route establishing means for pre-loading two-dimensional vector data of the guidance route of the road onto the three-dimensional road model corresponding to the road, Extracting a preset height corresponding to the road from the three-dimensional road model, and combining the two-dimensional vector data and the preset height as three-dimensional vector data of a guiding route of the road;

The storage device is further configured to store three-dimensional vector data of a guiding route of the road;

The three-dimensional display device further includes: a second acquisition module and a second rendering module,

The second acquiring module is configured to acquire three-dimensional vector data of a guiding route of the target road from the three-dimensional vector data of the guiding route of the pre-stored road, where the target road refers to the planned a road within the road included in the navigation path that falls within the screen of the navigation device;

The second rendering module is configured to perform rendering in the navigation map according to the three-dimensional vector data of the guiding route of the target road to obtain a guiding route of the target road in a three-dimensional form.
The system of claim 7 wherein said system further comprises: navigating vehicle rendering means for locating the navigation vehicle and determining a foothold point of the navigation vehicle's current location to the guidance route of the target road, And drawing the navigation vehicle at the footing point.
The system according to any one of claims 6 to 8, wherein the system further comprises: a two-dimensional display device,

The two-dimensional display device is configured to: if the first acquisition module cannot acquire the three-dimensional vector data and the three-dimensional road model of the road to be displayed, obtain two-dimensional vector data of the road to be displayed, and according to the two-dimensional vector of the road to be displayed The data is rendered in the navigation map to obtain a two-dimensional road to be displayed.
The system according to any one of claims 6 to 8, wherein the three-dimensional road establishing device further comprises:

a shadow baking module, configured to perform shadow baking on the three-dimensional road model before the three-dimensional road vector data establishing module compiles the three-dimensional road model into three-dimensional vector data corresponding to the road;

The three-dimensional road vector data establishing module is specifically configured to: compile the three-dimensional road model after the shadow baking process into three-dimensional vector data corresponding to the road.