CN101197094B - Guiding method for continuous branching in electronic map - Google Patents

Abstract

The invention discloses a guiding method for continuous divergence in electric map, including the following procedures that: a related network model is built based on actual road conditions; high speed divergences in the network model are provided with single divergence 3D pictures; roads related to two high speed divergences which are relatively close are provided with continuous divergence 3D pictures; the current position of a car is known by positioning; when the car runs near the first divergence point of the high speed continuous divergence, continuous 3D pictures related to the high speed continuous divergence are displayed; when the car passes the first divergence point, the single divergence 3D pictures of next divergence point is displayed. Adopting the technical proposal of the invention can accurately tell actual road conditions, let a driver know in advance the road of continuous divergence and make navigation more accurate.

Description

The bootstrap technique of continuous branching in the electronic chart

Technical field

The present invention relates to the map of navigation electronic field, refer to the bootstrap technique of continuous branching in a kind of electronic chart especially.

Background technology

Along with the continuous development of airmanship, use tri-dimensional picture auxiliary electron digital map navigation to become ingredient very important in the navigational system, make that guidance path is directly perceived more accurately, navigation screen is more vivid.Described tri-dimensional picture is the picture of virtual road reality and annexation and the spatial relationship that reflects road.

Vehicular navigation system can call the tri-dimensional picture assisting navigation at complex crossing and high speed parting.The bootstrap technique of the single difference of prior art is:

A, set up its corresponding network model according to the real road situation;

B, be equipped with outlet information at the branch point place of network model and do not put the single difference tri-dimensional picture of high speed;

C, determine the vehicle current location by locator meams;

D, when vehicle ' during apart from described branch point certain distance, show described single difference tri-dimensional picture, use described branch point until vehicle.

Described certain distance can be for about 1 km.

Be a real road situation as shown in Figure 1, Fig. 2 is exactly its corresponding network model, and wherein, node A is a branch point, is equipped with outlet information and the setting single difference tri-dimensional picture of high speed as shown in Figure 3 at this some place.In the process that vehicle is travelling, determine the current location of vehicle by locator meamss such as GPS.If show described single difference tri-dimensional picture during vehicle distances A1000 rice, roll the A outlet away from until described vehicle.

For common high speed outlet, use the single difference tri-dimensional picture of high speed can reach good navigation effect, but, use annexation and correct guided vehicle navigation that the single difference tri-dimensional picture of simple high speed can not fine reflection real road for the high speed outlet of the viaduct of more complicated or continuous branching.Real road situation as shown in Figure 4, its corresponding network model as shown in Figure 5, it has two branch point A and B,

In traditional making navigation electronic map method, be made into the network model of Fig. 5 according to the real road situation of Fig. 4, be equipped with the single difference tri-dimensional picture of high speed of Fig. 6 and Fig. 7 then respectively at A point and B point, if the distance of AB is longer, making can reach navigation effect preferably like this, but, if the actual range between AB is less than 300 meters, what vehicle faced after using from the A branch point at once is the B branch point, because of the actual range of AB very short, leave the driver judges travel route in the B branch point limited time like this for, and the time that the single difference tri-dimensional picture of the high speed at B place shows in navigational system is very short, be not easy to the driver and judge travel route, influence navigation quality.

Summary of the invention

The problem to be solved in the present invention provides a kind of bootstrap technique that can accurately reflect the road actual conditions and improve continuous branching in the electronic chart of navigation accuracy.

In order to address the above problem, the technical scheme of the bootstrap technique of continuous branching is in the electronic chart of the present invention:

Set up its corresponding network model according to the real road situation;

High speed parting in described network model is equipped with single difference tri-dimensional picture;

On the road that is associated at a distance of two nearer high-speed ramification points, be equipped with the continuous branching tri-dimensional picture;

Determine the position that vehicle is current by locator meams;

If vehicle ' during apart from first branch point certain distance of high-speed and continuous difference, shows the continuous branching tri-dimensional picture related with it;

After vehicle rolls first branch point away from, show the single difference tri-dimensional picture of next branch point.

Described certain distance is 1 km.

Described locator meams is the GPS location.

Compared with prior art, the beneficial effect of the bootstrap technique of continuous branching is in the electronic chart of the present invention:

Owing to adopt on the road that is associated at a distance of two nearer high-speed ramification points and be equipped with the continuous branching tri-dimensional picture, reflected the road actual conditions exactly, make the driver predict the path that the continuous branching place is about to travel, make that navigation is more accurate.

Description of drawings

Fig. 1 is a kind of real road synoptic diagram of single difference;

Fig. 2 is the network model synoptic diagram of Fig. 1;

Fig. 3 is the single difference tri-dimensional picture synoptic diagram of Fig. 2;

Fig. 4 is a kind of real road synoptic diagram of continuous branching;

Fig. 5 is the network model synoptic diagram of Fig. 4;

Fig. 6 and Fig. 7 be the bootstrap technique of prior art continuous branching be equipped with the tri-dimensional picture synoptic diagram;

Fig. 8 is the bootstrap technique process flow diagram of continuous branching in the electronic chart of the present invention;

Fig. 9 is the network model synoptic diagram that has path tag of Fig. 4;

Figure 10 is a kind of continuous branching tri-dimensional picture synoptic diagram;

Figure 11 is another continuous branching tri-dimensional picture synoptic diagram;

Figure 12 is the real road synoptic diagram of another continuous branching;

Figure 13 is the corresponding network model synoptic diagram of Figure 12;

Figure 14 is the continuous branching tri-dimensional picture synoptic diagram of Figure 13;

Figure 15 is another continuous branching tri-dimensional picture synoptic diagram of Figure 13.

Embodiment

As shown in Figure 8, the bootstrap technique of continuous branching comprises the steps: in the electronic chart of the present invention

1) sets up its corresponding network model according to the real road situation;

2) the high speed parting in described network model is equipped with single difference tri-dimensional picture;

3) on the road of two nearer high speed branched knot spot correlation connection, be equipped with the continuous branching tri-dimensional picture;

4) determine the position that vehicle is current by locator meams;

5) if vehicle ' during apart from first branch point certain distance of high-speed and continuous difference, shows the continuous branching tri-dimensional picture related with it;

6) after vehicle rolls first branch point away from, show the single difference tri-dimensional picture of next branch point.

Wherein, described certain distance is 1 km or the distance that can know demonstration.Described locator meams can adopt GPS location or other locator meams.

As shown in Figure 4, be real road with continuous branching point A and B, make its corresponding network model as shown in Figure 9 according to this real road.Judge the distance of the internodal road b of AB, if the distance of b is less, then be equipped with high-speed and continuous difference tri-dimensional picture, because of A node and B node place have disposed the single difference tri-dimensional picture of corresponding high speed, single difference is the relation between a node (as the A node) and related two road (as road a and the b), so the high speed single branched graph is directly on this node of typing (as the A node), but continuous branching be two nodes (as node A and B) with related three roads (as road a, b and c) between relation, so be configured on the road that is associated, road a in Fig. 9, b and c are provided with high-speed and continuous difference tri-dimensional picture, are high-speed and continuous difference tri-dimensional picture on the middle road abc direction as Figure 10.Figure 11 is the high-speed and continuous difference tri-dimensional picture of road abe direction.

This example is determined the current location of vehicle in electronic chart by gps signal.Enter actual navigational state behind the vehicle launch, when A point 1 km of vehicle ' in Fig. 9, the high-speed and continuous difference tri-dimensional picture that shows Figure 10, and can follow corresponding voice suggestion, the path situation that the driver is grasped in advance be about to travel, when vehicle ' to the A point, high-speed and continuous difference tri-dimensional picture disappears, though driver's this moment has understood the selection problem of using after the A branch point in B branch point travel direction in advance, the single difference tri-dimensional picture of displayed map 3 then, further the prompting driver passes through the high-speed and continuous parting smoothly until vehicle.

Technique scheme is suitable for is not only high-speed and continuous difference in the example, high-speed and continuous difference for ordinary road complex crossing, viaduct and following Figure 12 also is suitable for, concrete implementation step is same as the previously described embodiments, and Figure 13 is its corresponding network model.Figure 14 and 15 is continuous branching tri-dimensional pictures.

Claims (3)

1. the bootstrap technique of continuous branching in the electronic chart is characterized in that, comprises the steps:

Set up its corresponding network model according to the real road situation;

High speed parting in described network model is equipped with single difference tri-dimensional picture;

On the road that is associated at a distance of two nearer high-speed ramification points, be equipped with the continuous branching tri-dimensional picture;

Determine the position that vehicle is current by locator meams;

If vehicle ' during apart from first branch point certain distance of high-speed and continuous difference, shows the continuous branching tri-dimensional picture related with it;

After vehicle rolls first branch point away from, show the single difference tri-dimensional picture of next branch point.

2. bootstrap technique as claimed in claim 1 is characterized in that, described certain distance is 1 km.

3. as claim 1 or 2 described bootstrap techniques, it is characterized in that described locator meams is the GPS location.

Images