CN106897321A - The method and device of show map data - Google Patents

Abstract

The invention discloses a method and device for displaying map data, relates to the field of data processing, and is invented for thoroughly solving the problem of data display area overlapping. The method of the present invention includes: responding to the zoom-in operation instruction, determining the local area that needs to be enlarged in the map graphic, the map graphic is composed of a plurality of regional graphics, each regional graphic is correspondingly displayed with a data display area, and the local area covers at least two The data display area of a geographical graph; find the data display area with the highest overlapping degree in the local area to obtain the target data display area; calculate the magnification of the local area according to the area parameters of the target data display area; zoom in on the local area according to the magnification Displayed so that the data display areas in the local area do not overlap each other. The present invention is mainly applied to the client side.

Description

Method and device for displaying map data

technical field

The invention relates to the field of data processing, in particular to a method and device for displaying map data.

Background technique

When displaying regional data, in order to facilitate users to visually view the correlation between data and regions, the prior art provides a data display method based on map graphics. In Figure 1, the map of China is composed of different regions such as provinces, municipalities, and autonomous regions, and each region is graphically displayed with data about the region. Compared with the data display method in the form of a list, the data display method based on map graphics is easier to be accepted by users because of its intuitive and vivid features.

In order to enable users to obtain more useful information from map graphics, the prior art displays data in different shapes of data display areas such as circles or water droplets in the map graphics. In Figure 1, each geographical graph corresponds to a circular radiation area, and the data of the region is displayed in the corresponding circular radiation area, and the data with larger values corresponds to a larger circular radiation area. Through this display method, users can intuitively feel the size of data in each region, which helps users to make subjective comparisons of data in different regions. However, this display mode also has certain defects while bringing convenience to users: when there are many geographical graphics in a small range, multiple data display areas of different sizes will be concentrated in this small range Displayed inside, so that each data display area overlaps with each other. It can be seen from Figure 1 that the overlap between circular radiation areas will cause serious interference to users viewing data.

In order to solve this problem, the prior art provides an improvement method, which reduces the overlapped data display areas according to a certain ratio, so as to reduce the degree of overlap between the data display areas. However, the effect of this method is relatively limited, because although the area of the data display area can be reduced theoretically enough to eliminate the overlap between the areas, the data content will be proportionally reduced with the data display area. In most cases, a data display area that is too small will prevent users from seeing the data content clearly. For the "Beijing-Tianjin-Hebei" region, where the geographic graphics are small and dense, on the premise of ensuring that the user can see the data content clearly, the method of reducing the data display area alone is far from achieving the goal of eliminating area overlap. And if the data of city level, county level or even township level are displayed in the map graphics, the effect of this method is even more stretched. It can be seen from the above that the existing methods of reducing the data display area are not effective in improving the area overlapping.

Contents of the invention

The invention provides a method and device for displaying map data, which can completely solve the problem of overlapping data display areas.

In order to solve the above problems, on the one hand, the present invention provides a method for displaying map data, the method comprising:

In response to the zoom-in operation instruction, determine the local area that needs to be enlarged in the map graphic. The map graphic is composed of a plurality of regional graphics, and each regional graphic is correspondingly displayed with a data display area, and the local area covers at least two data displays of the regional graphics. area;

Find the data display area with the highest overlapping degree in the local area to obtain the target data display area;

Calculate the magnification factor of the local area according to the area parameters of the target data display area;

The local area is enlarged and displayed according to the magnification, so that the data display areas in the local area do not overlap each other.

On the other hand, the present invention also provides a device for displaying map data, the device comprising:

The determining unit is configured to determine a local area that needs to be enlarged in the map graphic in response to the zoom-in operation command. The map graphic is composed of a plurality of regional graphics, and each regional graphic is correspondingly displayed with a data display area, and the local area covers at least two The data display area of the geographical graph;

The search unit is used to find the data display area with the highest overlapping degree in the local area to obtain the target data display area;

a calculation unit, configured to calculate the magnification of the local area according to the area parameters of the target data display area;

The display unit is configured to enlarge and display the local area according to the magnification, so that the data display areas in the local area do not overlap each other.

The method and device for displaying map data provided by the present invention can determine the local area that needs to be enlarged according to the zoom-in operation instruction, calculate the magnification factor based on the area parameters of the data display area with the highest overlapping degree in the local area, and adjust the local area according to the magnification factor to zoom in. Since the magnification factor is calculated based on the area parameters of the data display area with the highest degree of overlap, no overlap between the data display areas can be ensured after the local area is enlarged. Compared with the prior art, the present invention does not need to reduce the data display area, so the problem of overlapping data display areas can be completely solved on the premise that the user can clearly view the data content.

The above description is only an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, it can be implemented according to the contents of the description, and in order to make the above and other purposes, features and advantages of the present invention more obvious and understandable , the specific embodiments of the present invention are enumerated below.

Description of drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiment. The drawings are only for the purpose of illustrating a preferred embodiment and are not to be considered as limiting the invention. Also throughout the drawings, the same reference numerals are used to designate the same components. In the attached picture:

Fig. 1 shows a schematic diagram of an interface for displaying map data in the prior art;

Fig. 2 shows a flow chart of a method for displaying map data provided by an embodiment of the present invention;

FIG. 3 shows a flowchart of another method for displaying map data provided by an embodiment of the present invention;

Fig. 4 shows a schematic diagram of determining a local area in an embodiment of the present invention;

Fig. 5 shows a schematic diagram of an enlarged local area in an embodiment of the present invention;

FIG. 6 shows a block diagram of a device for displaying map data provided by an embodiment of the present invention;

FIG. 7 shows a block diagram of another device for displaying map data provided by an embodiment of the present invention.

detailed description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

An embodiment of the present invention provides a method for displaying map data, as shown in Figure 2, the method includes:

201. In response to a zoom-in operation instruction, determine a local area that needs to be zoomed-in in a map graphic.

This embodiment is mainly applied to the client side, and the client may be, but not limited to, installed on a mobile phone, a personal computer (Personal Computer, PC for short), a tablet computer, and a wearable smart device. In practical applications, all electronic products with data processing functions and visualized human-computer interaction functions are applicable to the method flow given in the embodiments of the present invention.

In the visual interface for data query, the client displays a map graphic for data display. The map graphic is composed of multiple regional graphics, and each regional graphic corresponds to a data display area. The data content of the corresponding geographical graph is displayed in the display area.

Taking the map of China as an example, refer to Figure 1. The map graphics of China are composed of regional graphics corresponding to different provinces, municipalities or autonomous regions such as Beijing, Shanxi, Shanghai, and Qinghai. There is a circular radial data display area corresponding to each geographical graph, and the data content of the corresponding geographical graph is displayed in the data display area. The data display area is larger, and the data display area with smaller data value is smaller.

In this embodiment, the client receives a zoom-in operation instruction triggered externally by the device, and the operation instruction is used to zoom in and display a part of the map graphic. In practical applications, the client may receive the zoom-in operation instruction through peripheral devices such as a keyboard, a mouse, and a touch screen.

After receiving the zoom-in operation instruction, the client determines the local area to be zoomed in according to the zoom-in operation instruction. The so-called determining the local area includes determining the position of the local area and determining the size (including shape and size) of the local area. In this embodiment, the position and size of the local area are determined by the user through the zoom-in operation command. However, in order to simplify the complexity of the user's operation, the client can also limit the shape of the local area in actual applications, such as generating rectangles, squares, etc. by default. Or a circular local area, the user only needs to determine the position and size of the local area.

The purpose of selecting a local area is to enlarge and display part of the regional graphics in the map graphic, so the local area usually covers at least two data display areas of the regional graphics. The so-called "covering the data display area" in this embodiment includes the following two situations: the data display area as a whole is located in the local area; 2. The data display area is partially located in the local area. In practical applications, the client can also identify the regional graphics covered by the local area. For the regional graphics that partially or completely fall in the local area, the client equally determines that the data display area corresponding to these regional graphics is covered by the local area. This embodiment will be described later by taking a partial area covering the data display area as an example.

In practical applications, the user may only select a data display area corresponding to a geographical graph to zoom in, that is, a partial area covers only one data display area. In this case, the client can enlarge and display the content in the local area according to the preset magnification factor. The preset magnification can be determined based on the size of the data display area, or can be determined based on the overall size of the map graphics, or just a fixed value written in the computer program. This embodiment does not specify the specific magnification of the preset magnification. Values are limited.

For the case where the local area covers at least two data display areas, the client continues to perform subsequent steps 202 to 204 .

202. Find the data display area with the highest overlapping degree in the local area to obtain the target data display area.

When the local area covers at least two data display areas, the client acquires the position parameter and size parameter of each data display area. The position parameter includes the coordinate parameter of the data display area in the interface, such as the coordinates of the center point of the area; the size parameter includes the shape information of the area (rectangle, circle) and the size value corresponding to the specific shape, for example, for a square shape, the side The length is XXX, and for a circular shape, the radius is XX. According to the position parameter and the size parameter, the client side calculates the degree of overlap between the data display areas.

This embodiment can calculate the degree of overlap between two or more data display areas. Taking the calculation of the degree of overlap between two data display areas as an example, it is first necessary to qualitatively define whether there is an overlap between the data display areas, and only if there is an overlap, will the degree of overlap be further quantitatively calculated. Taking the circular data display area as an example, the client can define whether there is overlap between the circular areas through the size relationship between the sum of the circular radii and the distance between the centers of the circles. If the center distance of the circular area (obtainable through the position parameter) is greater than or equal to the sum of the radii of the circular areas (obtainable through the size parameter), then it is determined that there is no overlap between the circular areas, otherwise there is an overlap.

For data display areas with overlapping parts, the client calculates the degree of overlap that can be quantified by numerical values based on the position parameters and size parameters of each data display area, and then selects the data display area with the highest degree of overlap and determines it as Target data display area.

The purpose of selecting the data display area with the highest degree of overlap is to calculate the magnification factor used to enlarge the local area. The reason why the data display area with the highest degree of overlap is selected to calculate the magnification factor is because this can ensure that after the local area is enlarged, there will be no overlap between the data display areas with the highest degree of overlap. Since the overlapping parts between the regions with the highest degree of overlapping can be eliminated, the overlapping parts between other regions must also be eliminated, so that there is no region overlapping phenomenon in the local region.

This situation may also be encountered in practical applications: there is no overlapping relationship between the data display areas in the partial area cover. In this case, theoretically, local amplification is unnecessary, so the client may not perform subsequent steps 203 to 204 . However, considering that the user has an actual need to zoom in on a local area, in an implementation of this embodiment, the client can select the two closest data display areas as the target data display area, and continue to perform steps 203 to 204 . The client can determine the distance between the data display areas through the following methods: 1. Determine the distance between the coordinates of the center point of the data display area; 2. Determine the distance between the edges of the data display area.

203. Calculate the magnification factor of the local area according to the area parameter of the target data display area.

The area parameters are used to reflect the size of the data display area, and the area parameters of different forms of data display areas are different. For example, the area parameters of a circular data display area may include radius and center distance; the area parameters of a square data display area may include side length, diagonal length, and center distance; the area parameters of a rectangular data display area may include length, width Diagonal length and center distance.

The principle for the client to calculate the magnification factor is: in the enlarged local area, there is no overlap between the target data display areas, that is, there is no overlap between the data display areas with the highest degree of overlap. Based on this principle, the minimum value of the magnification factor should ensure that after partial zoom-in, the edges of the original overlapping positions of the target data display areas are tangent. If the magnification factor is smaller than the minimum value, there will still be partial overlap between the target data display areas. In practical applications, it may be considered that there is a certain margin between the target display areas, so the calculated magnification factor may be appropriately greater than the above minimum value by adjusting the weight or increasing the adjustment coefficient. This embodiment does not limit the specific numerical value of the weight value or the adjustment coefficient.

204. Enlarge and display the local area according to the magnification, so that the data display areas in the local area do not overlap each other.

The so-called enlarged display of the local area according to the magnification refers to enlarging the size of the local area and the content displayed in the local area according to the magnification. Exemplarily, for a square local area, the original side length of the local area can be multiplied by the magnification factor to obtain the enlarged side length; or for a circular local area, the radius of the local area can be multiplied by the magnification factor to obtain the enlarged side length of the radius.

After zooming in on the local area, the client can switch the displayed map graphic to the enlarged local area, so that only the enlarged local area is displayed in the visual interface; or, the enlarged local area can also be displayed in the preset The fixed position, such as the upper left corner of the interface, does not affect the user to view the rest of the map graphics.

The method for displaying map data provided by this embodiment can determine the local area that needs to be enlarged according to the zoom-in operation instruction, calculate the magnification factor based on the area parameters of the two data display areas with the highest overlapping degree in the local area, and adjust the local area according to the magnification factor. area to zoom in. Since the magnification factor is calculated based on the area parameters of the data display area with the highest degree of overlap, no overlap between the data display areas can be ensured after the local area is enlarged. Compared with the prior art, this embodiment does not need to reduce the data display area, so the problem of overlapping data display areas can be completely solved on the premise that the user can clearly view the data content.

Further, as a refinement and extension of the method shown in FIG. 2 , the embodiment of the present invention also provides a method for displaying map data. As shown in Figure 3, the method includes:

301. In response to a zoom-in operation instruction, determine a local area that needs to be zoomed-in in a map graphic.

In this embodiment, the zoom-in operation instruction may specifically be a click operation instruction. The user clicks or double-clicks a certain position in the map graphic through the mouse (for the touch screen, a finger can also be used) to trigger the click operation command. The client responds to the instruction, acquires the coordinates of the operation focus, and then determines the area with the first preset size centered on the coordinates as the local area. The preset size is determined by the size parameters pre-written in the client. In practical applications, the preset size can be limited to a rectangular area with a length of 4 cm and a width of 3 cm, or a square area with a side length of 4 cm, or a radius 2.5 cm circular area. No matter which position the user clicks, the shape of the pop-up local area in the interface is consistent.

The above numerical values are used for illustrative purposes only, and are not intended as specific limitations to this embodiment.

In another implementation manner of this embodiment, the zoom-in operation instruction may also be a drag operation instruction. The user starts from a certain position in the map graphics, and drags in any direction with the mouse or finger to form a rectangular, square or circular area. The client obtains the coordinates of the start point and the end point of the drag operation, and determines the position and size of the local area according to the positions of the two coordinates and the preset area shape. Different from the above method, in this method, the size of the local area can be set by the user. The larger the dragging distance, the larger the size of the local area formed. This embodiment does not set the size of the local area formed by the drag operation. Size is limited.

Further, in another implementation manner of this embodiment, the zoom-in operation instruction may also be a move operation instruction. The client monitors the position of the mouse cursor, and determines an area with a second preset size centered on the position of the cursor as the local area. The second preset size is similar to the first preset size, and its size is also predetermined on the client side, and the user cannot change it through manual operation. Both the first preset size and the second preset size may be the same or different, which is not limited in this embodiment. In practical applications, when the user is operating the mouse, the mouse cursor is in the process of continuous movement, and the client can execute the process shown in Figure 3 based on the new cursor position when the cursor position changes. From the user's point of view, its The effect is similar to the magnifying glass function.

In an example of this embodiment, the local area determined by the client is shown as a rectangular area in FIG. 4 .

302. In the local area, calculate an overlap coefficient between each data display area.

In this embodiment, a circular data display area is taken as an example for illustration. After determining the partial area, the client calculates the overlap coefficient between the data display areas covered by the partial area, and the overlap coefficient is used to represent the degree of overlap between two data display areas. Specifically, the client can calculate the overlap coefficient according to the following formula:

S=r ₁ +r ₂ -d ₁₂

Among them, S is the overlap coefficient, r ₁ and r ₂ are the radii of the two data display areas respectively, and d ₁₂ is the distance between the centers of the two data display areas. The larger the value of S, the more overlapping parts of the two data display areas, that is, the higher the degree of overlap.

In this embodiment, the client can pair all the data display areas covered by the local area in pairs to obtain area pair. Among them, n is the number of data display areas covered by the local area, Indicates the number of all permutations and combinations of a pair of data display areas randomly extracted from n data display areas. Then, according to the implementation of step 202 in Figure 2, the client detects whether there is an overlapping relationship between each pair of data display areas, eliminates the area pairs that do not have an overlapping relationship, and calculates the overlapping coefficients for the remaining area pairs using the above formula .

Exemplarily, it is assumed that the local area covers four data display areas A, B, C, and D. The client pairs these 4 data display areas in pairs, and obtains 6 area pairs: "A+B", "A+C", "A+D", "B+C", "B+D" and "C+D". The client side removes the area pairs whose sum of the radii of the data display area is less than or equal to the distance between the centers of the circles, and keeps the area pairs whose sum of the radii is greater than the distance between the centers of the circles. Assume that the zone pairs reserved by the client are "A+D", "B+C", "B+D" and "C+D". Then the client calculates the overlapping coefficients of each region pair separately, and obtains 4 overlapping coefficients corresponding to the 4 region pairs.

Furthermore, in another implementation of this embodiment, the client may not separately judge whether there is an overlapping relationship between the data display areas, but directly calculate the overlap coefficient between any two data display areas, by The numerical properties of the overlap coefficients identify and eliminate overlap coefficients for pairs of regions that do not have an overlapping relationship. specific:

The client pairs all the data display areas covered by the local area in pairs to obtain area pair. Then the client calculates the overlap coefficients for all the area pairs using the above formula, and removes the overlap coefficients that are less than or equal to 0.

Exemplarily, it is assumed that the client still obtains 6 region pairs: "A+B", "A+C", "A+D", "B+C", "B+D" and "C+D". The client calculates the overlapping coefficients of each region pair separately, and obtains 6 overlapping coefficients corresponding to 6 region pairs: "-1.1", "0", "-2", "3", "3.4" and "5". Then the client removes the overlapping coefficients "-1.1", "0" and "-2", and keeps the overlapping coefficients "3", "3.4" and "5".

303. Determine a pair of data display areas with the largest overlapping coefficients as target data display areas.

In the above example, the client selects the overlap factor "5" among the reserved overlap factors "3", "3.4" and "5", and determines a pair of data display areas corresponding to the overlap factor as the target data display area.

In another implementation manner of this embodiment, the client may not eliminate overlapping coefficients less than or equal to 0, but directly select the largest overlapping coefficient from all obtained overlapping coefficients.

304. Calculate the magnification factor of the local area according to the area parameter of the target data display area.

The client calculates the magnification factor according to the following formula:

Wherein, N is the magnification factor, r _t1 and r _t2 are the radii of the two target data display areas respectively, and d _t1t2 is the distance between the centers of the two target data display areas.

Exemplarily, assuming that the radii of the two target data display areas are 3 and 4 respectively, and the center-to-center distance is 5, then the magnification factor N calculated according to this formula is 1.4.

305. Move the enlarged local area to the center of the visual interface for display.

The client enlarges the local area according to the obtained magnification factor, and then moves the enlarged local area to the center of the visual interface for display. When moving the local area, the coordinates of the center point of the local area can coincide with the coordinates of the center point of the visual interface, so as to ensure that the local area is located at the center of the visual interface. As shown in Figure 5, the visual interface displays the enlarged local area, and no map graphics are displayed anymore.

306. In response to the restoration operation instruction, display the map graphic in the display mode before zooming in.

Further, as an optional step of the method shown in FIG. 3 , after zooming in and displaying a local area, in order to facilitate the user to view the originally displayed map graphics, the client terminal may also provide the user with an interface rollback function. When the user triggers a recovery operation command, the client responds to the command and displays the map graphics displayed before the partial zoom-in.

In practical application, the user can trigger the recovery operation instruction by clicking, double-clicking, long-pressing, sliding and other operations at any position in the visual interface. Alternatively, the client may also provide a control dedicated to triggering the rollback function, and the user triggers a recovery operation instruction by clicking the control.

Furthermore, in another implementation manner of this embodiment, the client may also reduce or eliminate the problem of area overlap by reducing the number of data display areas in the map graphic. The client provides the user with the function of filtering the data display area, and the user can select the geographic graphics that do not want to display data content, or select the geographic graphics that want to display data content. The client terminal only displays the corresponding data display area and data content on the geographical graph where the user wants to display data content in the map graph. In practical application, the user can directly click on the region graph in the map graph, or can also select the region to display or not display the data content in the drop-down list provided by the client. Make specific restrictions.

Further, as an implementation of the method shown in FIG. 2 or FIG. 3 , an embodiment of the present invention also provides a device for displaying map data. The device can be located inside the client, or can be independent of the client but connected to the client. establish data interactions. It should be noted that this device embodiment corresponds to the foregoing method embodiment, and can realize all the content in the foregoing method embodiment. For ease of reading, this device embodiment only briefly describes the content in the foregoing method embodiments, and does not repeat details in the method embodiments one by one. As shown in FIG. 6 , the device includes: a determination unit 61 , a search unit 62 , a calculation unit 63 and a display unit 64 . in,

The determining unit 61 is configured to determine a local area that needs to be enlarged in the map graphic in response to the zoom-in operation instruction. The map graphic is composed of a plurality of regional graphics, each regional graphic is correspondingly displayed with a data display area, and the local area covers at least two The data display area of a geographic graph;

A search unit 62, configured to search for the data display area with the highest overlapping degree in the local area to obtain the target data display area;

A calculation unit 63, configured to calculate the magnification factor of the local area according to the area parameters of the target data display area;

The display unit 64 is configured to enlarge and display the local area according to the magnification, so that the data display areas in the local area do not overlap each other.

Further, as shown in FIG. 7, the determining unit 61 includes:

The first determining module 611 is configured to determine, in response to the click operation instruction, an area centered on the operation focus and having a first preset size as a local area.

Further, as shown in FIG. 7, the determining unit 61 includes:

The second determining module 612 is configured to determine an area formed by dragging as a local area in response to a dragging operation instruction.

Further, as shown in FIG. 7, the determining unit 61 includes:

The third determining module 613 is configured to determine, in response to the movement operation instruction, an area centered on the position of the cursor and having a second preset size as a local area.

Further, as shown in FIG. 7, the search unit 62 includes:

Calculation module 621, used to calculate the overlap coefficient between each data display area in the local area when the data display area is a circular area, the size of the overlap coefficient is used to represent the degree of overlap between two data display areas ;

The determining module 622 is configured to determine a pair of data display areas with the largest overlap coefficient as the target data display area.

Further, the calculation module 621 is used to calculate the overlap coefficient according to the following formula:

S=r ₁ +r ₂ -d ₁₂

Among them, S is the overlap coefficient, r ₁ and r ₂ are the radii of the two data display areas respectively, and d ₁₂ is the distance between the centers of the two data display areas.

Further, the calculation unit 63 is used to calculate the magnification according to the following formula:

Wherein, N is the magnification factor, r _t1 and r _t2 are the radii of the two target data display areas respectively, and d _t1t2 is the distance between the centers of the two target data display areas.

Further, the display unit 64 is configured to move the enlarged local area to the center of the visual interface for display.

Further, the display unit 64 is configured to display the map graphic in the display mode before zooming in in response to the restoration operation instruction.

The device for displaying map data provided in this embodiment can determine the local area that needs to be enlarged according to the zoom-in operation instruction, calculate the magnification factor based on the area parameters of the data display area with the highest overlapping degree in the local area, and perform the local region according to the magnification factor. Zoom in on the display. Since the magnification factor is calculated based on the area parameters of the data display area with the highest degree of overlap, no overlap between the data display areas can be ensured after the local area is enlarged. Compared with the prior art, this embodiment does not need to reduce the data display area, so the problem of overlapping data display areas can be completely solved on the premise that the user can clearly view the data content.

The device for displaying map data includes a processor and a memory. The above-mentioned determination unit 61, search unit 62, calculation unit 63, and display unit 64 are all stored in the memory as program units, and the above-mentioned program stored in the memory is executed by the processor. unit to achieve the corresponding function.

The processor includes a kernel, and the kernel fetches corresponding program units from the memory. One or more kernels can be set, and the problem of overlapping data display areas can be completely solved by adjusting kernel parameters.

Memory may include non-permanent memory in computer-readable media, random access memory (RAM) and/or non-volatile memory, such as read-only memory (ROM) or flash memory (flashRAM), and memory includes at least one storage chip.

The present application also provides a computer program product, which, when executed on a data processing device, is adapted to execute a program code that is initialized with the following method steps: in response to a zoom-in operation instruction, determine a local area that needs to be zoomed in on a map graphic, and the map The graph is composed of multiple regional graphs, and each regional graph corresponds to a data display area, and the local area covers at least two data display areas of the regional graph; find the data display area with the highest overlapping degree in the partial area to obtain the target data Display area; calculate the magnification factor of the local area according to the area parameters of the target data display area; enlarge and display the local area according to the magnification factor, so that the data display areas in the local area do not overlap each other.

Those skilled in the art should understand that the embodiments of the present application may be provided as methods, systems, or computer program products. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present application is described with reference to flowcharts and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the present application. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and a combination of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing equipment produce a An apparatus for realizing the functions specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby The instructions provide steps for implementing the functions specified in the flow chart or blocks of the flowchart and/or the block or blocks of the block diagrams.

In a typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.

Memory may include non-permanent storage in computer readable media, in the form of random access memory (RAM) and/or nonvolatile memory, such as read only memory (ROM) or flash RAM. The memory is an example of a computer readable medium.

Computer-readable media, including both permanent and non-permanent, removable and non-removable media, can be implemented by any method or technology for storage of information. Information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read only memory (ROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Flash memory or other memory technology, Compact Disc Read-Only Memory (CD-ROM), Digital Versatile Disc (DVD) or other optical storage, Magnetic tape cartridge, tape magnetic disk storage or other magnetic storage device or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, computer-readable media excludes transitory computer-readable media, such as modulated data signals and carrier waves.

The above are only examples of the present application, and are not intended to limit the present application. For those skilled in the art, various modifications and changes may occur in this application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the scope of the claims of the present application.

Claims (10)

1. A method of displaying map data, the method comprising:

responding to an amplification operation instruction, determining a local area needing to be amplified in a map graph, wherein the map graph is composed of a plurality of regional graphs, each regional graph is correspondingly displayed with a data display area, and the local area at least covers the data display areas of two regional graphs;

searching a data display area with the highest overlapping degree in the local area to obtain a target data display area;

calculating the magnification of the local area according to the area parameters of the target data display area;

and amplifying and displaying the local area according to the amplification factor so that the data display areas in the local area are not overlapped.

2. The method of claim 1, wherein the determining a local area in the map graphic that needs to be magnified in response to the magnification operation instruction comprises:

and responding to a click operation instruction, and determining an area with an operation focus as a center and a first preset size as the local area.

3. The method of claim 1, wherein the determining a local area in the map graphic that needs to be magnified in response to the magnification operation instruction comprises:

and determining the area formed by dragging as the local area in response to the dragging operation instruction.

4. The method of claim 1, wherein the determining a local area in the map graphic that needs to be magnified in response to the magnification operation instruction comprises:

and responding to the movement operation instruction, and determining an area with a second preset size and the position of the cursor as the center as the local area.

5. The method according to claim 1, wherein the data display area is a circular area, and the searching for the data display area with the highest overlapping degree in the local area to obtain the target data display area comprises:

in the local area, calculating an overlapping coefficient between the data display areas, wherein the overlapping coefficient is used for representing the degree of overlapping between the two data display areas;

and determining a pair of data display areas with the largest overlapping coefficient as target data display areas.

6. The method of claim 5, wherein calculating the overlap factor between the data display regions comprises:

the overlap factor is calculated according to the following formula:

S＝r₁+r₂-d₁₂

wherein S is an overlap coefficient, r₁And r₂Radii of two data display areas, d, respectively₁₂The center distance of the two data display areas.

7. The method of claim 1, wherein said calculating a magnification of said local region based on region parameters of said target data display region comprises:

the magnification was calculated according to the following formula:

$N=\frac{\left(r_{t1}+r_{t2}\right)}{d_{t1t2}}$

wherein N is the magnification factor, r_t1And r_t2Radii of two target data display areas, d, respectively_t1t2The center distance of the two target data display areas.

8. The method of claim 1, wherein said magnifying the local area by the magnification comprises:

and moving the enlarged local area to the central position of the visual interface for displaying.

9. The method according to any one of claims 1 to 8, wherein after the magnifying displaying of the partial area by the magnification, the method further comprises:

and responding to the recovery operation instruction, and displaying the map graph in a display mode before zooming.

10. An apparatus for displaying map data, the apparatus comprising:

the map graphic comprises a determining unit, a display unit and a display unit, wherein the determining unit is used for responding to an amplifying operation instruction and determining a local area needing to be amplified in a map graphic, the map graphic consists of a plurality of region graphics, a data display area is correspondingly displayed on each region graphic, and the local area at least covers the data display areas of two region graphics;

the searching unit is used for searching the data display area with the highest overlapping degree in the local area to obtain a target data display area;

the calculation unit is used for calculating the magnification of the local area according to the area parameters of the target data display area;

and the display unit is used for amplifying and displaying the local area according to the amplification factor so as to enable the data display areas in the local area not to be overlapped.