CN1996038B - A road network indication method, device and equipment in GPS navigation - Google Patents

Abstract

The present invention is applicable to the field of navigation, and provides a road network indication method, device and equipment in GPS navigation. The method includes the following steps: receiving a scale switching instruction; according to the current scale corresponding to the scale switching instruction, and a navigation image The display control information generates a navigation image including road indication information, and the road indication information includes road driving direction information; and displays the navigation image. The invention adds road driving direction signs in the road network of the electronic map, and displays the road running direction to the user according to the navigation scale selected by the user during navigation. At the same time, the present invention also uses hollow lines to mark roads, and the width of the hollow lines and the width of the sides of the hollow lines are used to visually mark the grade of the road, so that users can easily know the driving direction of the road, road grade and other information.

Description

A road network indication method, device and equipment in GPS navigation

technical field

The invention belongs to the field of navigation, and in particular relates to a road network indication method, device and equipment in GPS navigation.

Background technique

The Global Positioning System (GPS) uses navigation satellites for timing, positioning and ranging, and can provide real-time and high-precision three-dimensional space and speed for sea, land and air users in an all-weather and all-round way all over the world. and time information. The system is mainly composed of three parts, namely the space part, the ground control part and the user device part. The space part is composed of 24 satellites, distributed in 6 track planes. The ground control part is composed of the main control station responsible for managing and coordinating the work of the entire ground control system, the ground antenna that injects the search message into the satellite under the control of the main control station, the monitoring station as the automatic data collection center, and the communication auxiliary system. The user equipment part is mainly composed of GPS receiver and satellite antenna. GPS receivers are divided into geodetic type, total station type, timing type, handheld type, and integrated type according to the model, and are divided into vehicle type, ship type, airborne type, satellite type, and missile type according to the application.

At present, the GPS system has been widely used in land applications such as vehicle navigation, emergency response, atmospheric physical observation, geophysical resource exploration, engineering survey, deformation monitoring, crustal movement monitoring, municipal planning control, ocean-going ship optimal voyage route determination, ship real-time Dispatch and navigation, ocean rescue, ocean treasure exploration, hydrogeological survey, ocean platform positioning, sea level rise and fall monitoring and other marine applications, as well as aircraft navigation, aviation remote sensing attitude control, low-orbit satellite orbit determination, missile guidance, aviation rescue and manned Aerospace applications such as spacecraft protection and detection.

In car navigation, the GPS navigation device used by the user can be a personal digital assistant (Personal Digital Assistant, PDA), mobile terminal, MP3, MP4, electronic wrist device and various electronic devices such as miniature electronic instruments, and the GPS navigation device is installed in the device. system. During navigation, the system calculates a navigation route according to the corresponding navigation route planning principles, such as expressway priority, shortest time principle, shortest distance principle, etc. During the driving process of the vehicle, the system determines the current location, moving direction, speed, etc. to navigate.

At present, when displaying the calculated path, different navigation systems adopt different display methods. In the graphical display of various existing navigation systems, lines are used to mark the road on the map, and the shape of the road changes. It is basically irrelevant or not strongly related to the change of the scale. The lines marking the road have no direction indication, and cannot indicate the direction of the one-way line and its direction, the direction of the double-way line and its two sides, especially when the user crosses an area with different traffic rules. If you are not familiar with the traffic rules, it is difficult for users to know which direction to drive on both sides of the two-way street.

Contents of the invention

The purpose of the embodiments of the present invention is to provide a road network indication method in GPS navigation, aiming to solve the problem that the existing GPS navigation system lacks road network indication information such as driving direction, which causes inconvenience for users to navigate.

The embodiment of the present invention is achieved like this, a road network indication method in GPS navigation, described method comprises the following steps:

Receive scale switching command;

According to the current scale corresponding to the scale switching instruction and the navigation image display control information, a navigation image including road indication information is generated, and the road indication information includes the driving direction information of the road. When the road is marked with a hollow line, the The road indication information further includes width information of a hollow line or a hollow line side, and the width of the hollow line or a hollow line side corresponds to the scale and the level of the road;

Display the navigation image.

Another object of the embodiments of the present invention is to provide a road network indication device in GPS navigation, the device comprising:

The electronic map database is used to store road network attribute data and road indication information in the electronic map;

A scale switching command receiving module, configured to receive a scale switching command;

A navigation image generation module, configured to generate a navigation image containing road indication information according to the current scale corresponding to the scale switching instruction and the navigation image display control information, the road indication information includes the driving direction information of the road, when the road adopts When the hollow line is marked, the road indication information further includes width information of the hollow line or the edge of the hollow line, and the width of the hollow line or the edge of the hollow line corresponds to the scale and the level of the road; and

The navigation image display module is used to display the navigation image.

Another object of the present invention is to provide a GPS navigation device, the device includes a road network indicating device, and the device includes:

The electronic map database is used to store road network attribute data and road indication information in the electronic map;

A scale switching command receiving module, configured to receive a scale switching command;

A navigation image generation module, configured to generate a navigation image containing road indication information according to the current scale corresponding to the scale switching instruction and the navigation image display control information, the road indication information includes the driving direction information of the road, when the road adopts When the hollow line is marked, the road indication information further includes width information of the hollow line or the edge of the hollow line, and the width of the hollow line or the edge of the hollow line corresponds to the scale and the level of the road; and

The navigation image display module is used to display the navigation image.

The invention adds road driving direction signs in the road network of the electronic map, and displays the road running direction to the user according to the navigation scale selected by the user during navigation. At the same time, the present invention also uses hollow lines to mark roads, and the width of the hollow lines and the width of the sides of the hollow lines are used to visually mark the level of the road, so that users can easily know the driving direction of the road, road level and other information.

Description of drawings

Fig. 1 is a flow chart of the implementation of the road network indication method provided by the embodiment of the present invention;

Fig. 2 is a structural diagram of a road network indicating device in a navigation mode provided by an embodiment of the present invention;

Fig. 3 is a structural diagram of a road network indicating device in browsing mode provided by an embodiment of the present invention.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

In the embodiment of the present invention, road driving direction signs are added to the road network of the electronic map, and the driving direction of the road is displayed to the user according to the navigation scale selected by the user during navigation.

Figure 1 shows the implementation process of the road network indication method provided by the embodiment of the present invention, which is described in detail as follows:

In step S101 , a scale switching instruction issued by a user is received.

In step S102, a navigation image including road indication information is generated according to the current scale corresponding to the scale switching command input by the user and the image display control information.

In the navigation mode, the system calculates the image content for smooth display when the image moves with the navigation object according to the current scale, time, moving direction, position, speed and other parameters corresponding to the scale switching command input by the user. Then the system generates corresponding navigation images according to the calculated image content and the local area of the electronic map where the image is located, the driving direction of the road corresponding to the current scale and other road indication information. In order to increase the smooth display effect of the image, the generated image is stored in the buffer. During actual navigation, the current location, moving direction and speed information of the navigation object is judged according to the GPS signal received by the GPS signal receiver. During simulated navigation, the current location, moving direction and speed information of the navigation object are set by the user.

In the browsing mode, the system generates corresponding information according to the current scale and the current location information browsed by the user, according to the local area where the current location is located and the surrounding adjacent local areas, and according to the road indication information such as the driving direction corresponding to the current scale. The navigation image and store it in the buffer. The number of images in the surrounding adjacent local areas is related to the capacity of the buffer. If the capacity of the buffer is larger, the number of images in the adjacent local areas will be more.

In the embodiment of the invention, the driving direction of the road may be represented by arrows or other signs.

In step S103, the temporary navigation image temporarily stored in the buffer is displayed seamlessly and continuously at the inherent display frequency of the hardware where the navigation system is located, and picture animation is coordinated with the hardware display device to achieve the navigation image moving with the navigation object or the user's browsing position. The effect of moving continuously and smoothly changing with the scale.

In order to improve the aesthetic effect of the road network and conveniently add more road indication information in the road network, as another embodiment of the present invention, hollow lines are used to mark the roads in the road network, the width of the hollow line or the width of the side of the hollow line The width is determined by the selected scale. For roads of the same level, the larger the scale, the wider the hollow line and the side of the hollow line marking the road. Under the same scale, the higher the level of the road (for example, the level of the expressway is higher than that of ordinary roads), the wider the hollow line marking the road and the side of the hollow line. The width of the hollow line or the width of the hollow line edge depends on the road width factor corresponding to the scale and road class.

Fig. 2 shows the structure of the road network indicating device in the navigation mode provided by the embodiment of the present invention. For the convenience of description, only the parts related to the present invention are shown. The device can be a software unit built in the GPS navigation device, a hardware unit, or a unit combining software and hardware.

The road network attribute data in the navigation electronic map is stored in the electronic map database 21, such as the length, road name, level and traffic regulation information of the road in the road network. Instructions. In the embodiment of the invention, the driving direction of the road may be represented by arrows or other signs.

In order to improve the aesthetic effect of the road network and conveniently add more road indication information in the road network, as another embodiment of the present invention, hollow lines are used to mark the roads in the road network, the width of the hollow line or the width of the side of the hollow line The width is determined by the selected scale. For roads of the same level, the larger the scale, the wider the hollow lines marking the road and the sides of the hollow lines. Under the same scale, the higher the level of the road (for example, the level of the expressway is higher than that of ordinary roads), the wider the hollow line marking the road and the side of the hollow line. The width of the hollow line or the width of the hollow line edge depends on the road width factor corresponding to the scale and road class. The road width coefficient is stored in the electronic map database 21 .

The scale switching instruction receiving module 22 receives a scale switching instruction issued by the user. The navigation image content calculation module 23 calculates the image content for smooth display when the image moves with the navigation object according to the received values such as current scale, time, moving direction and speed of the navigation object.

During actual navigation, the current location, moving direction and speed information of the navigation object is judged by the navigation information judging module 24 according to the GPS signal received by the GPS signal receiver. During simulated navigation, the current position, moving direction and speed information of the navigation object are judged by the simulated navigation control module 25 according to the moving speed of the navigation object set by the user, the departure time and the current time of the navigation object.

The navigation mode image calculation processing module 26 generates a corresponding navigation image according to the image content calculated by the navigation image content calculation module 23, the local area of the electronic map where the image is located, the road indication information corresponding to the current scale, or the road width coefficient. In order to ensure the seamless and continuous display of the navigation images, the navigation images are stored in a buffer.

The navigation image display module 27 plays the temporary images temporarily stored in the buffer to the user in a seamless and continuous manner at the inherent display frequency of the hardware of the navigation system, so that the navigation image moves with the navigation object or the user's browsing position moves smoothly with the scale The effect of the change.

Fig. 3 shows the structure of the road network indicating device in the browsing mode provided by the embodiment of the present invention. For the convenience of description, only the parts related to the present invention are shown. The device can be a software unit built in the GPS navigation device, a hardware unit, or a unit combining software and hardware.

The road network attribute data in the navigation electronic map is stored in the electronic map database 21, such as the length, road name, level and traffic regulation information of the road in the road network. Instructions. In the embodiment of the invention, the driving direction of the road may be represented by arrows or other signs.

As mentioned above, in order to improve the aesthetic effect of the road network and conveniently add more road indication information in the road network, as another embodiment of the present invention, hollow lines are used to mark the roads in the road network.

The scale switching instruction receiving module 22 receives a scale switching instruction issued by the user. The browsing mode image calculation and processing module 31 generates a corresponding navigation image according to the current location information browsed by the user, the road indication information, the local area of the electronic map where the current location browsed by the user, and the adjacent local area information. In order to ensure the seamless and continuous display of the navigation images, the navigation images are stored in a buffer. The number of images in the adjacent local area is related to the capacity of the GPS navigation equipment buffer, the larger the buffer capacity, the more images in the adjacent local area.

The navigation image display module 27 plays the temporary images temporarily stored in the buffer to the user in a seamless and continuous manner at the inherent display frequency of the hardware of the navigation system, so that the navigation image moves with the navigation object or the user's browsing position moves smoothly with the scale The effect of the change.

In the embodiment of the invention, road indication information such as driving direction is added to the road in the electronic map, and the road is marked with a hollow line, and the level of the road is marked by the width of the hollow line and the width of the side of the hollow line, so that the user can easily know the road level. Driving direction, road level and other information provide users with great convenience.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the embodiments of the invention should be included in the embodiments of the invention. within the scope of protection.

Claims (15)

1. a road network indication method in GPS navigation, it is characterized in that, described method comprises the following steps: Receive scale switching command; According to the current scale corresponding to the scale switching instruction and the navigation image display control information, a navigation image including road indication information is generated, and the road indication information includes the driving direction information of the road. When the road is marked with a hollow line, the The road indication information further includes width information of a hollow line or a hollow line side, and the width of the hollow line or a hollow line side corresponds to the scale and the level of the road; Display the navigation image. 2. The road network indication method in GPS navigation as claimed in claim 1, wherein the display control information of the navigation image includes the intrinsic value of the system hardware calculated according to the current position, moving direction and speed of the navigation object. Under the display frequency, the image content displayed with the movement of the navigation object, the local area of the electronic map where the navigation object is located, and the road indication information. 3. The road network indication method in GPS navigation as claimed in claim 1, wherein the display control information of the navigation image comprises the current position information browsed by the user, the road indication information, the electronic map where the current position browsed by the user The local area and the information of adjacent local areas. 4. The road network indication method in GPS navigation as claimed in claim 1, 2 or 3, wherein said navigation image display control information also includes road width coefficient information corresponding to the scale and road level corresponding to the road level. Wide coefficient information. 5. The road network indication method in GPS navigation as claimed in claim 1, 2 or 3, is characterized in that, for the roads with the same level, the larger the scale, the wider the hollow line or the side of the hollow line marking the road, the same Under the scale, the higher the level of the road, the wider the hollow line or the side of the hollow line marking the road. 6. A road network indicating device in GPS navigation, characterized in that said device comprises: The electronic map database is used to store road network attribute data and road indication information in the electronic map; A scale switching command receiving module, configured to receive a scale switching command; A navigation image generation module, configured to generate a navigation image containing road indication information according to the current scale corresponding to the scale switching instruction and the navigation image display control information, the road indication information includes the driving direction information of the road, when the road adopts When the hollow line is marked, the road indication information further includes width information of the hollow line or the edge of the hollow line, and the width of the hollow line or the edge of the hollow line corresponds to the scale and the level of the road; and The navigation image display module is used to display the navigation image. 7. The road network indication device in GPS navigation as claimed in claim 6, is characterized in that, described navigation image generation module further comprises: The navigation image content calculation module is used to calculate the image content displayed with the movement of the navigation object under the inherent display frequency of the hardware where the system is located according to the current scale, time, moving direction and speed of the navigation object; and The navigation mode image calculation and processing module is used to generate a corresponding navigation image according to the calculated image content, the local area of the electronic map where the image is located, and the road indication information corresponding to the current scale. 8. The road network indication device in GPS navigation as claimed in claim 6, is characterized in that, described navigation image generation module further comprises: The browsing mode image calculation and processing module is used to generate corresponding navigation images according to the current location information browsed by the user, the road indication information, the local area of the electronic map where the current location browsed by the user is located, and the adjacent local area information. 9 . The road network indicating device in GPS navigation according to claim 6 , 7 or 8 , wherein the navigation image display control information further includes road width coefficient information corresponding to road grades. 10. The road network indicating device in GPS navigation as claimed in claim 6, 7 or 8, characterized in that, for roads with the same level, the larger the scale, the wider the hollow line or the side of the hollow line marking the road, the same Under the scale, the higher the level of the road, the wider the hollow line or hollow line marking the road. 11. A GPS navigation device, characterized in that the device comprises a road network indicating device, and the device comprises: The electronic map database is used to store road network attribute data and road indication information in the electronic map; A scale switching command receiving module, configured to receive a scale switching command; A navigation image generation module, configured to generate a navigation image containing road indication information according to the current scale corresponding to the scale switching instruction and the navigation image display control information, the road indication information includes the driving direction information of the road, when the road adopts When the hollow line is marked, the road indication information further includes width information of the hollow line or the edge of the hollow line, and the width of the hollow line or the edge of the hollow line corresponds to the scale and the level of the road; and The navigation image display module is used to display the navigation image. 12. GPS navigation equipment as claimed in claim 6, is characterized in that, described navigation image generation module further comprises: The navigation image content calculation module is used to calculate the image content displayed with the movement of the navigation object under the inherent display frequency of the hardware where the system is located according to the current scale, time, moving direction and speed of the navigation object; and The navigation mode image calculation and processing module is used to generate a corresponding navigation image according to the calculated image content, the local area of the electronic map where the image is located, and the road indication information corresponding to the current scale. 13. GPS navigation equipment as claimed in claim 11, is characterized in that, described navigation image generation module further comprises: The browsing mode image calculation and processing module is used to generate corresponding navigation images according to the current location information browsed by the user, the road indication information, the local area of the electronic map where the current location browsed by the user is located, and the adjacent local area information. 14. The GPS navigation device according to claim 11, 12 or 13, wherein the navigation image display control information further includes road width coefficient information corresponding to the road level. 15. GPS navigation device as claimed in claim 11, 12 or 13, it is characterized in that, for the roads of the same level, the larger the scale, the wider the hollow line or the side of the hollow line marking the road, under the same scale, the road The higher the level, the wider the hollow lines or hollow lines marking the road.

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