CN108664455B - Map annotation data processing method and device - Google Patents
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Abstract
The invention relates to a method and a device for processing map annotation data, wherein the method comprises the following steps: acquiring a target linear element on a map; searching a line marking pattern and a point marking pattern corresponding to the target linear element; selecting a candidate position for marking on the target linear element according to the line marking style; determining a candidate marking area corresponding to the candidate position according to the point marking style; acquiring a labeling area which corresponds to the candidate position and is around the candidate labeling area; filtering the candidate positions, wherein the position relation between the candidate labeling areas corresponding to the filtered candidate positions and the labeling areas around the corresponding candidate labeling areas accords with an avoidance condition; and determining the marking position of the target linear element according to the residual candidate positions after filtering. The scheme provided by the application improves the map labeling data processing efficiency.
Description
Technical Field
The invention relates to the technical field of computers, in particular to a method and a device for processing map annotation data.
Background
With the continuous development of geographic information systems, the labeling function on maps is widely applied in many fields. As the data of the geographic information system is increased, map elements which need to be marked on the map are increased. At present, when processing labeling data of a linear element on a map, a labeling area on the linear element needs to be determined according to the trend of the linear element, and then labeling avoidance processing is performed according to the determined labeling area.
However, when the conventional labeling method is used to perform labeling data processing on the linear elements, the labeling area is greatly affected by the trend of the linear elements, so that a large amount of workload is introduced when determining the labeling area, and the processing efficiency of map labeling data is low. The problem is particularly serious when the linear elements have a complex course.
Disclosure of Invention
Therefore, it is necessary to provide a map annotation data processing method and device for solving the problem of low efficiency when map annotation data is processed according to the conventional annotation method.
A map note data processing method, the method comprising:
acquiring a target linear element on a map;
searching a line marking pattern and a point marking pattern corresponding to the target linear element;
selecting a candidate position for marking on the target linear element according to the line marking style;
determining a candidate marking area corresponding to the candidate position according to the point marking style;
acquiring a labeling area which corresponds to the candidate position and is around the candidate labeling area;
filtering the candidate positions, wherein the position relation between the candidate labeling areas corresponding to the filtered candidate positions and the labeling areas around the corresponding candidate labeling areas meets an avoidance condition;
and determining the marking position of the target linear element according to the residual candidate positions after filtering.
A map note data processing apparatus, the apparatus comprising:
the acquisition module is used for acquiring a target linear element on a map;
the searching module is used for searching a line marking pattern and a point marking pattern corresponding to the target linear element;
a candidate position selecting module, configured to select a candidate position for labeling on the target linear element according to the line labeling style;
a candidate labeling area determining module, configured to determine, according to the point labeling pattern, a candidate labeling area corresponding to the candidate position;
a marking position determining module, configured to obtain a marking area that corresponds to the candidate position and is around the candidate marking area; filtering the candidate positions, wherein the position relation between the candidate labeling areas corresponding to the filtered candidate positions and the labeling areas around the corresponding candidate labeling areas meets an avoidance condition; and determining the marking position of the target linear element according to the residual candidate positions after filtering.
According to the map labeling data processing method and device, two labeling styles are correspondingly set for the target linear element on the map, and because the linear element needing to be labeled is processed by the labeling data, the candidate position used for labeling on the target linear element can be obtained according to the corresponding line labeling style, and then the candidate labeling area corresponding to the candidate position can be determined according to the corresponding point labeling style. The processing mode avoids the workload introduced by the constraint of the trend of the target linear element when the candidate labeling area is determined according to the line labeling style, and improves the map labeling data processing efficiency. In addition, the processing mode can also directly filter candidate positions needing avoiding according to the position relation between the candidate marking area determined by the point marking pattern and the marking area around the candidate marking area, so that the condition of shielding coverage among different marking areas is avoided.
Drawings
FIG. 1 is a diagram of an application environment of a method for processing map annotation data in one embodiment;
FIG. 2 is a schematic diagram of an internal structure of an electronic device for implementing a map annotation data processing method in one embodiment;
FIG. 3 is a flowchart illustrating a method for processing map annotation data according to an embodiment;
FIG. 4 is a flowchart illustrating the step of filtering candidate locations in one embodiment;
FIG. 5 is a flowchart illustrating a method for processing map annotation data according to another embodiment;
FIG. 6 is a flowchart illustrating a method for processing map annotation data in another embodiment;
FIG. 7 is a diagram illustrating an interface for map annotation in accordance with an embodiment;
FIG. 8 is a schematic diagram of an interface for map annotation in another embodiment;
FIG. 9 is a block diagram showing the structure of a map annotation data processing apparatus according to an embodiment;
FIG. 10 is a block diagram showing a structure of a map annotation data processing apparatus according to another embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
FIG. 1 is a diagram of an application environment of a method for processing annotation data of a map in an embodiment. Referring to fig. 1, the map annotation data processing method is applied to a map annotation data processing system. The map annotation data processing system comprises a terminal 110 and a server 120, wherein the terminal 110 is connected with the server 120 through a network. The terminal 110 may specifically be a desktop terminal or a mobile terminal, and the mobile terminal may specifically be at least one of a mobile phone, a tablet computer, a notebook computer, and the like. The server 120 may be a separate physical server or a cluster of physical servers. The terminal 110 may obtain the target linear element on the map and the line marking style and point marking style corresponding to the target presence element from the server 120, so as to apply the map marking data processing method on the terminal 110. The map annotation data processing method can also be directly applied to the server 120.
Fig. 2 is a schematic diagram of an internal structure of an electronic device in one embodiment. As shown in fig. 2, the electronic apparatus includes a processor, a nonvolatile storage medium, an internal memory, a network interface, a display screen, and an input device, which are connected by a system bus. The non-volatile storage medium of the electronic equipment stores an operating system, a database and a map annotation data processing device, the database stores a target linear element on a map and a line annotation style and a point annotation style corresponding to the target current element, and the map annotation data processing device is used for realizing a map annotation data processing method applicable to the electronic equipment. The processor of the electronic device is used for providing calculation and control capability and supporting the operation of the whole electronic device. The internal memory of the electronic device provides an environment for the operation of the map annotation data processing apparatus in the non-volatile storage medium, and the internal memory can store computer readable instructions, and when the computer readable instructions are executed by the processor, the processor can be caused to execute a map annotation data processing method. The network interface of the electronic device is used for transmitting map-related data. The display screen of the electronic device may be a liquid crystal display screen or an electronic ink display screen, and the input device of the electronic device may be a touch layer covered on the display screen, a key, a trackball or a touch pad arranged on a shell of the electronic device, or an external keyboard, a touch pad or a mouse. The electronic device may be the terminal 110 or the server 120 in fig. 1. It will be appreciated by those skilled in the art that the structure shown in fig. 2 is a block diagram of only a portion of the structure associated with the present application, and does not constitute a limitation on the electronic device to which the present application applies, and that a particular electronic device may include more or fewer components than shown in the drawings, or may combine certain components, or have a different arrangement of components.
FIG. 3 is a flowchart illustrating a method for processing annotation data of a map according to an embodiment. The embodiment is mainly illustrated by applying the method to the electronic device in fig. 2. Referring to fig. 3, the map annotation data processing method specifically includes the following steps:
s302, acquiring a target linear element on the map.
Wherein a line element refers to one element type among map elements drawn on a map. The linear elements have a line expression form. Specifically, the linear element may be a subway line, a road line, or a contour line of a river or a mountain, or the like. The target linear element is a linear element that needs to be subjected to data processing.
In one embodiment, the electronic device may acquire a corresponding target linear element on the map when detecting a preset trigger event. The preset trigger event may be a new data event, and when detecting that a map element is newly added to a locally stored map, the electronic device triggers to acquire a corresponding target linear element on the map. The electronic device may also periodically trigger the acquisition of the target linear elements on the map.
In one embodiment, the electronic device may retrieve a corresponding target line element on the map upon detecting the occurrence of a specified triggering event. The specified trigger event may be a request event for performing linear element labeling triggered by the user through the electronic device, and after detecting the request event, the electronic device acquires the linear element specified in the request event as the target linear element.
S304, searching a line marking pattern and a point marking pattern corresponding to the target linear element.
The line marking style refers to a marking style defined according to the line shape of the line-shaped element. The point annotation pattern refers to an annotation pattern defined by a single point. The marking style comprises parameters required for marking the marking content. Such parameters are: text font, character size, character spacing, or character color, etc.
In one embodiment, the electronic device may define element identifications for each line element on the map in advance. The element identification is used to uniquely identify the line element. The electronic equipment can also set corresponding line marking styles and point marking styles for each linear element respectively, correspondingly store the line marking styles and point marking styles corresponding to the linear elements in a file, a database or a cache of the electronic equipment through element identifiers of the linear elements, and acquire the line marking styles and point marking styles from the file, the database or the cache when needed.
After the electronic device obtains the target linear element, the electronic device can obtain the element identifier of the linear element, and locally search a line marking style and a point marking style which have a corresponding relation with the element identifier according to the element identifier of the linear element.
For example, for the beijing city subway line No. 14, the electronic device may define an element identifier of "050202" of the subway line to identify the subway line. The electronic apparatus may set a corresponding line mark pattern "linetextsymbolozer" and a dot mark pattern "pointtextsymbolozer" to the map line, respectively, and store the "linetextsymbolozer" and the "pointtextsymbolozer" in correspondence to "050202".
S306, selecting a candidate position for marking on the target linear element according to the line marking style.
Specifically, since the line-shaped element appears as a line on the map and has a certain spatial span, when the line-shaped element is labeled on the map, the label is generally dispersed at a plurality of positions on the line-shaped element. The electronic device may define a manner of selecting a candidate location for annotation in an online annotation style in advance.
In one embodiment, the candidate position selection mode defined by the electronic device in the online annotation style may be a uniform point selection mode. The electronic device may define a starting position for selecting the candidate position and a length interval for uniformly selecting the point in the online annotation pattern. The electronic device may select the candidate positions for marking on the target linear element from the start position defined in the line marking style according to the length interval defined in the line marking style when the candidate positions need to be selected.
In one embodiment, the selection mode of the candidate position defined in the online annotation pattern by the electronic device may also be a random point selection mode. The electronic device may define a random function for selecting the candidate location and the number of candidate locations to be selected in the online annotation pattern. When the candidate position needs to be selected, the electronic device may randomly select the candidate positions for labeling on the target linear elements of the number defined in the line marking pattern according to the random function defined in the line marking pattern.
Further, in one embodiment, the electronic device defines a distance threshold between adjacent candidate locations in a random point selection manner. When the electronic equipment randomly selects the candidate positions according to the random function defined in the line marking pattern, the candidate positions with the distance between the randomly selected candidate positions smaller than the distance threshold value are filtered, so that the distance between the randomly selected candidate positions accords with the distance threshold value defined in advance by the electronic equipment, and the aims that the randomly selected candidate positions are concentrated and cannot be dispersedly marked on the line-shaped element are avoided.
And S308, determining a candidate marking area corresponding to the candidate position according to the point marking pattern.
Specifically, the candidate labeling area refers to a display area that needs to be occupied when labeling is performed at the candidate position. In an embodiment, the electronic device may obtain the annotation content annotated on the target linear element, and read the parameter included in the point annotation pattern, which is required for annotating the annotation content, and the electronic device may calculate the display size that the annotation content needs to occupy when annotated according to the obtained annotation content and the read parameter.
The electronic device may directly use the calculated display size as a display size that needs to be occupied when labeling the candidate position on the target linear element, so as to determine a candidate labeling area corresponding to the candidate position. The electronic device may also determine a display size obtained by enlarging the calculated display size as a display size to be occupied when labeling the candidate position on the target linear element, so as to determine a candidate labeling area corresponding to the candidate position.
Wherein the predefined length may be predefined by the electronic device in the dot labeling pattern. The length may specifically be a pixel coordinate distance or a coordinate distance of another preset positioning manner. A pixel refers to the smallest unit that can be displayed on a computer screen. In the present embodiment, the pixel may be a logical pixel or a physical pixel.
S310, a labeling area corresponding to the candidate position and around the candidate labeling area is obtained.
The labeling area around the candidate labeling area is a labeling area included in an area formed by outwards extending a certain distance by taking the candidate labeling area as a center. For example, the labeling area intersecting the candidate labeling area, the labeling area adjacent to the candidate labeling area and in the area formed by expanding with the candidate labeling area as the center, or the labeling area separated from the candidate labeling area and in the area formed by expanding with the candidate labeling area as the center may be the labeling area around the candidate labeling area.
In one embodiment, the electronic device may set a preset region for selecting a labeling region around the candidate labeling region in advance, where the preset region is formed by extending a preset length outward with the candidate position as a center. The electronic device may use the label area falling within the preset area as a label area around the candidate label area corresponding to the candidate position.
S312, the candidate positions are filtered, and the position relation between the candidate labeling areas corresponding to the filtered candidate positions and the labeling areas around the corresponding candidate labeling areas accords with avoidance conditions.
Specifically, the avoidance condition refers to a condition under which the candidate position needs to be filtered out to achieve avoidance. The position relation between the candidate labeling area and the labeling areas around the candidate labeling area is used for configuring avoidance conditions for screening the candidate positions. In one embodiment, the avoidance condition may be that the candidate labeling area and the labeling area around the candidate labeling area have an overlapping area. When the candidate labeling area and the labeling area around the candidate labeling area have an overlapping area, it is determined that the avoidance condition is satisfied, and the electronic device may filter out a candidate position corresponding to the candidate area.
And S314, determining the labeling position of the target linear element according to the residual candidate positions after filtering.
Specifically, the electronic device may directly use the remaining candidate positions after filtering as the labeling positions of the target linear elements, or may perform custom offset on the remaining candidate positions after filtering, and use the candidate positions after offset as the labeling positions of the target linear elements. For example, the left-shifted candidate positions after filtering are shifted by 2pd (device independent pixels) to the left to obtain the labeled positions of the target line elements.
According to the map labeling data processing method, two labeling styles are correspondingly set for the target linear element on the map, and because the linear element needing to be subjected to labeling data processing is the linear element, the candidate position for labeling on the target linear element can be obtained according to the corresponding line labeling style, and then the candidate labeling area corresponding to the candidate position can be determined according to the corresponding point labeling style. The processing mode avoids the workload introduced by the constraint of the trend of the target linear element when the candidate labeling area is determined according to the line labeling style, and improves the map labeling data processing efficiency. In addition, the processing mode can also directly filter candidate positions needing avoiding according to the position relation between the candidate marking area determined by the point marking pattern and the marking area around the candidate marking area, so that the condition of shielding coverage among different marking areas is avoided.
In one embodiment, step S306 specifically includes: determining initial coordinates used for selecting candidate positions on the target linear elements according to the line marking pattern; sequentially selecting candidate coordinates from the initial coordinate according to length intervals included in the line marking pattern; and taking the candidate coordinates as candidate positions for labeling on the target linear element.
Specifically, the electronic device may define a start coordinate for selecting the candidate location and a length interval for uniformly selecting the point in the online annotation pattern. The starting coordinate can be the coordinate of the midpoint position of the linear element or the coordinate of the end point position of the linear element; the length interval may be a pixel coordinate distance or a coordinate distance of other predetermined positioning means.
For example, when the candidate position needs to be selected, the electronic device may select candidate pixel points from pixel points corresponding to the target linear element in sequence according to the pixel coordinate distance defined in the line marking pattern from the starting pixel coordinate defined by the midpoint pixel position in the line marking pattern to both sides of the target linear element, and then use the pixel coordinates of the candidate pixel points as the candidate position for marking on the target linear element.
In this embodiment, by setting a line marking mode for the target linear element and uniformly selecting the candidate positions for marking on the target linear element according to the line marking mode, the selection of the candidate positions is more reasonable, and the requirement for marking the linear element is met.
In one embodiment, step S308 specifically includes: determining the size of a background frame for displaying the marked content according to the point marking style; extracting the distance between the boundary of the candidate marking area obtained by expanding the background frame and the boundary of the corresponding background frame from the point marking pattern; and determining a candidate marking area when marking the candidate position according to the size of the background frame and the distance.
Specifically, the electronic device may define in advance that the annotation content is displayed using the background frame in the point annotation style, and associate the point annotation style with the background frame parameter. The background frame parameter may be specifically a distance between a boundary of the background frame obtained by enlarging a display area that needs to be occupied by the annotation content and a boundary of the display area that needs to be occupied by the corresponding annotation content.
In this embodiment, the electronic device may acquire the annotation content annotated on the target linear element, and read the parameters included in the point annotation pattern and required for annotating the annotation content. The electronic equipment can calculate the display area occupied by the marked content according to the acquired marked content and the read parameters; and calculating the size of the background frame according to the background frame parameters associated with the point marking style, and determining the display area of the background frame.
The electronic device may further calculate a display size when labeling the candidate position according to a distance between a boundary of the candidate labeling area obtained by expanding the background frame and a boundary of the corresponding background frame defined in the point labeling style, and determine the labeling area when labeling the candidate position according to the display size.
In the embodiment, the candidate marking area corresponding to the candidate position is determined through the point marking pattern, so that the workload introduced by the constraint of the trend of the target linear element when the candidate marking area is determined according to the line marking pattern is avoided, and the map marking data processing efficiency is improved. Moreover, the marked content is displayed in the form of the background frame, so that the integrity of the marked content display can be ensured.
As shown in fig. 4, in an embodiment, the step S312 specifically includes the following steps:
s402, selecting out the corresponding candidate marking area and the candidate position of the marking area with the overlapping area around the corresponding candidate marking area.
S404, determining the map elements corresponding to the labeling areas which correspond to the picked candidate positions, have overlapping areas with the corresponding candidate labeling areas and are around the corresponding candidate labeling areas.
Specifically, when the electronic device performs position labeling and area labeling processing on each geographic element, the electronic device stores the position labeling and the area labeling corresponding to the map element. The electronic equipment can locally search for the map elements which correspond to the selected candidate position and have the corresponding relation with the labeling areas around the candidate position and have the overlapping areas with the candidate labeling areas of the candidate position. The map elements include point elements, line elements, planar elements, and the like. The Point element may be a Point of Interest (Point of Interest POI) and the planar element may be a sea level.
S406, the importance corresponding to the map element and the importance corresponding to the target linear element are obtained.
Specifically, each map element on the map has a corresponding importance level, and the greater the value corresponding to the importance level, that is, the higher the importance level, the more important the corresponding map element is in displaying the map.
In one embodiment, the electronic device may store the importance corresponding to each geographic pixel on the map in advance, and the electronic device may read the importance as needed. For example, the electronic device may define that the importance of the point of interest "Beijing university" is 1000 and the importance of the road line "four rings" is 800.
In one embodiment, the electronic device may store a calculation mode for calculating the importance degree corresponding to the map element in advance, and the electronic device may calculate the importance degree corresponding to the map element in real time when needed. When the electronic equipment performs importance calculation on map elements, the calculation can be performed by taking a plurality of dimensions as references. Specifically, two dimensions of a self attribute and an environment attribute of a map element can be used as references, wherein the self attribute refers to the type of the map element, and the environment attribute refers to the use scene of the map.
For example, the point of interest "Beijing university" and the road route "four rings" are map elements with different attributes, respectively. When the application scene of the map is route navigation, the importance of the four rings of the road line is higher than that of the interest point Beijing university; when the application scene of the map is used for searching the interest points, the importance of the interest points 'Beijing university' is higher than that of the road line 'four rings'.
S408, when the corresponding importance of the target linear element is smaller than that of the map element, filtering out the selected candidate position.
Specifically, the electronic device may compare the importance degree corresponding to the target linear element with the importance degree corresponding to the map element, determine that the target linear element is more important in the display of the map when the importance degree corresponding to the target linear element is greater than the importance degree corresponding to the map element, and retain the selected candidate position. And when the importance degree corresponding to the target linear element is smaller than the importance degree corresponding to the map element, judging that the map element corresponding to the labeling area around the candidate area is more important in the display of the map, and filtering out the selected candidate position.
In this embodiment, the marked positions are screened according to the importance of the map elements corresponding to the marked positions, and the marked positions corresponding to the map elements with high importance are reserved, so that the screening of the marked positions is more reasonable.
In one embodiment, after step S408, the map annotation data processing method further comprises: acquiring alternative positions corresponding to the filtered candidate positions; determining an alternative labeling area corresponding to the alternative position according to the point labeling style; acquiring a marking area which corresponds to the alternative position and is around the alternative marking area; and when the position relation between the alternative labeling area corresponding to the alternative position and the labeling area around the corresponding alternative labeling area does not accord with the avoidance condition, determining the labeling position of the target linear element according to the alternative position.
Specifically, the electronic device may set candidate positions on the corresponding target linear element in advance for each candidate position. The alternative locations are used for labeling when the corresponding candidate locations are filtered out. In one embodiment, the electronic device may specifically set a coordinate distance of the candidate location from the corresponding candidate location. For example, the coordinate distance from the candidate position to the corresponding candidate position may be specifically one half of the length of the background frame to be displayed at the candidate position.
After acquiring the candidate position corresponding to the selected candidate position, the electronic device may correspondingly process the relevant data of the candidate position according to a data processing manner for the candidate position, determine the candidate labeling area corresponding to the candidate position, acquire the labeling area corresponding to the candidate position and around the candidate labeling area, judge whether the position relationship between the candidate labeling area corresponding to the candidate position and the labeling area around the corresponding candidate labeling area meets the avoidance condition, and determine the labeling position of the target linear element according to the candidate position when judging that the avoidance condition is not met.
The avoidance condition is configured that an overlapping area exists between the candidate labeling area corresponding to the candidate position and the corresponding labeling area around the candidate labeling area, and the importance of the target linear element corresponding to the candidate labeling area is lower than that of the map element corresponding to the labeling area around the candidate labeling area.
In this embodiment, when the candidate position needs to be filtered out to implement avoidance, the annotation position is determined according to the candidate position corresponding to the filtered candidate position that does not need to be avoided, so that the annotation position is more reasonable to select, and the flexibility is strong.
In one embodiment, after step S314, the map annotation data processing method further comprises: acquiring the labeled content corresponding to the target linear element; rendering a background frame for displaying the marked content at the marked position according to the point marking style; and displaying the annotation content in the background frame.
Specifically, when a target linear element needs to be labeled on a map, the electronic device may obtain labeled content corresponding to the target linear element, render, by a map rendering engine, a background frame for displaying the labeled content at a labeled position of the target linear element according to a point labeling style corresponding to the target linear element, and display the labeled content in the background frame.
In this embodiment, the subway line is rendered in a point style manner, so that the marked content can be completely displayed on a small scale, and the display effect of the marked content is optimized. As shown in fig. 5, in a specific embodiment, the map annotation data processing method specifically includes the following steps:
s502, acquiring the target linear element on the map.
S504, a line marking pattern and a point marking pattern corresponding to the target linear element are searched.
S506, determining initial coordinates used for selecting candidate positions on the target linear element according to the line marking pattern; sequentially selecting candidate coordinates from the initial coordinate according to length intervals included in the line marking pattern; and taking the candidate coordinates as candidate positions for marking on the target linear element.
S508, determining the size of a background frame for displaying the marked content according to the point marking style; extracting the distance between the boundary of the candidate marking area obtained by expanding the background frame and the boundary of the corresponding background frame from the point marking pattern; and determining a labeling area when the candidate position is labeled according to the size and the distance of the background frame.
S510, a labeling area corresponding to the candidate position and around the candidate labeling area is obtained.
S512, selecting a corresponding candidate marking area, wherein the candidate position of the marking area which is overlapped with the marking area around the corresponding candidate marking area is selected; determining map elements corresponding to the labeling areas around the selected candidate labeling areas, which correspond to the selected candidate positions, have overlapping areas with the corresponding candidate labeling areas and are in a labeling area; acquiring the importance corresponding to the map elements and the importance corresponding to the target linear elements; and when the importance degree corresponding to the target linear element is smaller than that corresponding to the map element, filtering out the selected candidate position.
S514, judging whether the corresponding importance of the target linear element is smaller than that of the map element; if yes, go to step S516; if not, go to step S524.
S516, acquiring alternative positions corresponding to the filtered candidate positions; determining an alternative labeling area corresponding to the alternative position according to the point labeling style; and acquiring a marking area which corresponds to the alternative position and is around the alternative marking area.
S518, judging whether the position relation between the alternative labeling area corresponding to the alternative position and the labeling area around the corresponding alternative labeling area meets an avoidance condition or not; if yes, go to step S520; if not, go to step S522.
And S520, determining the labeling position of the target linear element according to the remaining candidate positions after filtering.
And S522, determining the labeling position of the target linear element according to the remaining candidate positions and the alternative positions after filtering.
And S524, determining the labeling position of the target linear element according to the candidate position.
S526, obtaining the labeled content corresponding to the target linear element; rendering a background frame for displaying the marked content at the marked position according to the point marking style; segmenting the tagged content to obtain tagged words; and displaying the label words in the background frame in a line.
Wherein the annotation content may be the name of the target line element. In one embodiment, the electronic device can set a simplified way for simplifying the annotation content in advance. The simplified mode may specifically be a feature word extraction mode. For example, "line 10" is extracted from "line 10 of the subway" as the name of the simplified target linear element.
In one embodiment, the electronic device may further establish a word segmentation bank in advance, where the word segmentation bank includes a plurality of candidate words. After the tagging content corresponding to the target linear element is obtained, the electronic equipment can select a candidate word matched with the tagging content from the word segmentation word bank as the tagging word. For example, "subway line 4 and great line" can be divided into "line 4" and "great line".
The electronic equipment can render at the labeling position according to the determined size of the background frame after completing the word segmentation of the labeling content, and then display each labeling word obtained by the word segmentation in the rendered background frame in a line.
In this embodiment, the annotation content is displayed in the background frame, and the annotation content is displayed in the background frame in a line, so that the annotation content can be completely displayed on a small scale, and the display effect of the annotation content is optimized.
As shown in fig. 6, in an embodiment, the map annotation data processing method specifically includes the following steps:
s602, acquiring the target linear element on the map.
S604, judging whether the target linear element is a subway line or a road line; if the subway line is adopted, the step S606 is executed; if the road route is determined, step S612 is executed.
S606, finding a line marking pattern and a point marking pattern corresponding to the target linear element; selecting candidate positions for marking on the target linear element according to the line marking style; and determining a candidate marking area corresponding to the candidate position according to the point marking style.
S608, acquiring a labeling area corresponding to the candidate position and around the candidate labeling area; filtering the candidate positions, wherein the position relation between the candidate labeling areas corresponding to the filtered candidate positions and the labeling areas around the corresponding candidate labeling areas meets an avoidance condition; and determining the labeling position of the target linear element according to the residual candidate positions after filtering.
S610, acquiring the labeled content corresponding to the target linear element; rendering a background frame for displaying the marked content at the marked position according to the point marking style; and displaying the annotation content in the background frame.
S612, searching a line marking style corresponding to the target linear element; and determining a marking position used for marking on the target linear element according to the line marking style.
In one embodiment, the step of determining, by the electronic device, a labeling position for labeling on the target linear element according to the line labeling style specifically includes: determining a candidate position used for marking on the target linear element and a candidate marking position corresponding to the candidate position according to the line marking style; acquiring a labeling area which corresponds to the candidate position and is around the candidate labeling area; filtering the candidate positions, wherein the position relation between the candidate labeling areas corresponding to the filtered candidate positions and the labeling areas around the corresponding candidate labeling areas accords with an avoidance condition; and determining the labeling position of the target linear element according to the remaining candidate positions after filtering.
Specifically, the electronic device may obtain the annotation content corresponding to the target linear element, determine each character included in the annotation content, and determine the display coordinate corresponding to each character in the annotation content according to the determined candidate position. The electronic equipment can determine the deflection angle of each character in the marked content relative to the horizontal direction according to the trend of the target linear element, determine the marked area corresponding to each character according to the parameter for marking the marked content and the display coordinate corresponding to each character defined in the linear marking style, and obtain the candidate marked area corresponding to the candidate position according to each marked area.
S614, obtaining the labeled content corresponding to the target linear element; according to the line marking style and the marking position, determining the corresponding display position of each character included in the marking content; and displaying the corresponding characters included in the annotation content at the determined display position.
Specifically, when the target linear element is a road line, the electronic device may draw a corresponding character at a display position corresponding to each character in the labeled content, and display the labeled content in a character string form.
In the embodiment, the subway line and the road line which are the same linear elements are marked in different marking modes, so that the discrimination between different types of lines is improved, and the line marking effect is optimized.
FIG. 7 illustrates an interface diagram for a map annotation on a small scale in one embodiment. Referring to fig. 7, the interface includes a subway line label 710 in a point label style and a road line label 720 in a line label style. The subway line labels 710 are displayed through a background frame, the occupied display area is small, and the related subway line information can be fully displayed under a small scale. FIG. 8 illustrates an interface diagram for large scale map labeling in one embodiment. Referring to fig. 8, the interface includes a subway line label 810 in a point label style and a road line label 820 in a line label style. Under the large scale, the road line and the subway line are marked in different marking modes, and can be clearly distinguished.
FIG. 9 is a block diagram of an embodiment of a device 900 for processing annotation data. Referring to fig. 9, the map annotation data processing apparatus 900 includes:
an obtaining module 901 is configured to obtain a target linear element on a map.
The searching module 902 is configured to search for a line marking style and a point marking style corresponding to the target line-shaped element.
And a candidate position selecting module 903, configured to select a candidate position for labeling on the target linear element according to the line labeling style.
And a candidate labeling area determining module 904, configured to determine a candidate labeling area corresponding to the candidate position according to the point labeling style.
A labeling position determining module 905, configured to obtain a labeling area corresponding to the candidate position and around the candidate labeling area; filtering the candidate positions, wherein the position relation between the candidate labeling areas corresponding to the filtered candidate positions and the labeling areas around the corresponding candidate labeling areas meets an avoidance condition; and determining the labeling position of the target linear element according to the remaining candidate positions after filtering.
The map annotation data processing apparatus 900 sets two annotation patterns for a target linear element on a map, and since the linear element to be annotated is to be processed by annotation data, a candidate position for annotation on the target linear element can be obtained according to the corresponding line annotation pattern, and then a candidate annotation area corresponding to the candidate position can be determined according to the corresponding point annotation pattern. The processing mode avoids the workload introduced by the constraint of the trend of the target linear element when the candidate labeling area is determined according to the line labeling style, and improves the map labeling data processing efficiency. In addition, the processing mode can also directly filter candidate positions needing avoiding according to the position relation between the candidate marking area determined by the point marking pattern and the marking area around the candidate marking area, so that the condition of shielding coverage among different marking areas is avoided.
In one embodiment, the candidate position selecting module 903 is further configured to determine, according to the line marking style, a start coordinate on the target linear element for selecting the candidate position; sequentially selecting candidate coordinates from the initial coordinate according to length intervals included in the line marking pattern; and taking the candidate coordinates as candidate positions for marking on the target linear element.
In this embodiment, a line marking mode is set for the target linear element, and the candidate positions for marking on the target linear element are uniformly selected according to the line marking mode, so that the selection of the candidate positions is more reasonable, and the requirement for marking the linear element is met.
In one embodiment, the candidate annotation region determination module 904 is further configured to determine a size of a background frame for displaying the annotation content according to the point annotation style; extracting the distance between the boundary of the candidate marking area obtained by expanding the background frame and the boundary of the corresponding background frame from the point marking pattern; and determining a labeling area when the candidate position is labeled according to the size and the distance of the background frame.
In the embodiment, the candidate marking area corresponding to the candidate position is determined through the point marking pattern, so that the workload introduced by the constraint of the trend of the target linear element when the candidate marking area is determined according to the line marking pattern is avoided, and the map marking data processing efficiency is improved. Moreover, the marked content is displayed in the form of the background frame, so that the integrity of the marked content display can be ensured.
In one embodiment, the labeling position determining module 905 is further configured to select a corresponding candidate labeling region, where there is a candidate position of an overlapping region with the labeling region around the corresponding candidate labeling region; determining map elements corresponding to the labeling areas which correspond to the selected candidate positions, have overlapping areas with the corresponding candidate labeling areas and are around the corresponding candidate labeling areas; acquiring the importance corresponding to the map elements and the importance corresponding to the target linear elements; and when the importance degree corresponding to the target linear element is greater than that corresponding to the map element, filtering out the selected candidate position.
In this embodiment, the marked positions are screened according to the importance of the map elements corresponding to the marked positions, and the marked positions corresponding to the map elements with high importance are reserved, so that the screening of the marked positions is more reasonable.
In one embodiment, the annotation position determination module 905 is further configured to obtain alternative positions corresponding to the filtered candidate positions; determining an alternative labeling area corresponding to the alternative position according to the point labeling style; acquiring a marking area which corresponds to the alternative position and is around the alternative marking area; and when the position relation between the candidate marking area corresponding to the candidate position and the marking area around the corresponding candidate marking area does not accord with the avoidance condition, determining the marking position of the target linear element according to the candidate position.
In this embodiment, when the candidate position needs to be filtered to implement avoidance, the annotation position is determined according to the candidate position corresponding to the filtered candidate position that does not need to be avoided, so that the selection of the annotation position is more reasonable and the flexibility is strong.
Fig. 10 is a block diagram of a map annotation data processing apparatus 900 according to another embodiment. Referring to fig. 10, the map annotation data processing apparatus 900 further includes: a labeling module 906, configured to obtain labeled content corresponding to the target linear element; rendering a background frame for displaying the marked content at the marked position according to the point marking style; and displaying the annotation content in the background frame.
In this embodiment, the subway line is rendered in a point style manner, so that the marked content can be completely displayed on a small scale, and the display effect of the marked content is optimized.
In one embodiment, the tagging module 906 further performs word segmentation on the tagged content to obtain tagged words; and displaying the label words in the background frame in rows.
In this embodiment. The marked content is displayed by using the background frame and is displayed in the background frame in a line mode, so that the marked content can be completely displayed under a small scale, and the display effect of the marked content is optimized.
In one embodiment, when the target linear element is a road line, the searching module 902 is further configured to search for a line marking pattern corresponding to the target linear element; the labeling position determining module 905 is further configured to determine a labeling position used for labeling on the target linear element according to the line labeling style; the labeling module 906 is further configured to obtain the labeled content corresponding to the target linear element; determining the display position corresponding to each character included in the marked content according to the line marking style and the marking position; and displaying the corresponding characters included in the annotation content at the determined display position.
In the embodiment, the subway line and the road line which are the same linear elements are marked in different marking modes, so that the discrimination between different types of lines is improved, and the line marking effect is optimized.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above may be implemented by a computer program, which may be stored in a non-volatile computer readable storage medium, and when executed, may include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), or the like.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is specific and detailed, but not to be understood as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (12)
1. A map annotation data processing method, the method comprising:
acquiring a target linear element on a map;
searching a line marking pattern and a point marking pattern corresponding to the target linear element, wherein a mode of selecting candidate positions for carrying out dispersed marking on the target linear element is defined in the line marking pattern, and the defined selection mode is a uniform point selection mode or a random point selection mode; the point annotation pattern comprises background frame parameters required for annotating the annotation content;
selecting a candidate position for marking on the target linear element according to the line marking style;
acquiring marked content corresponding to the target linear element, reading the size of a background frame used for displaying the marked content in the point marking style, extracting the distance between the boundary of a candidate marking area obtained by expanding the background frame and the boundary of the corresponding background frame from the point marking style, and determining the candidate marking area corresponding to the candidate position according to the size of the background frame and the distance;
acquiring a labeling area which corresponds to the candidate position and is around the candidate labeling area;
filtering the candidate positions, wherein the position relation between the candidate labeling areas corresponding to the filtered candidate positions and the labeling areas around the corresponding candidate labeling areas meets an avoidance condition;
acquiring an alternative position corresponding to the filtered candidate position, determining an alternative labeling area corresponding to the alternative position, and acquiring a labeling area corresponding to the alternative position and around the alternative labeling area;
when the candidate labeling area corresponding to the candidate position does not accord with the avoidance condition with the labeling area around the candidate labeling area, determining the labeling position of the target linear element according to the candidate position corresponding to the filtered candidate position and the remaining candidate positions after filtering;
and rendering a background frame for displaying the marked content at the marked position according to the point marking style, and displaying the marked content in the background frame.
2. The method according to claim 1, wherein said selecting a candidate position for labeling on the target line element according to the line labeling style comprises:
determining initial coordinates used for selecting candidate positions on the target linear element according to the line marking pattern;
sequentially selecting candidate coordinates from the initial coordinate according to length intervals included in the line marking pattern;
and taking the candidate coordinates as candidate positions for marking on the target linear element.
3. The method according to claim 1, wherein the filtering the candidate positions, and the position relationship between the candidate labeling areas corresponding to the filtered candidate positions and the labeling areas around the corresponding candidate labeling areas meets an avoidance condition, comprises:
selecting a corresponding candidate marking area, wherein the candidate position of the marking area which is overlapped with the marking area around the corresponding candidate marking area is selected;
determining map elements corresponding to the labeling areas around the selected candidate labeling areas, which correspond to the selected candidate positions, have overlapping areas with the corresponding candidate labeling areas, and are positioned in the corresponding candidate labeling areas;
acquiring the importance corresponding to the map element and the importance corresponding to the target linear element;
and when the importance degree corresponding to the target linear element is smaller than the importance degree corresponding to the map element, filtering out the selected candidate position.
4. The method of claim 1, wherein the displaying the annotation content in the background frame comprises:
performing word segmentation on the labeled content to obtain labeled words;
and displaying the label words in the background frame in a line.
5. The method of claim 1 wherein after said obtaining a target line element on a map, said method further comprises:
when the target linear element is a subway line, continuing to execute the step of searching the line marking pattern and the point marking pattern corresponding to the target linear element;
when the target linear element is a road line, then
Searching a line marking pattern corresponding to the target linear element;
determining a marking position used for marking on the target linear element according to the line marking style;
acquiring the marked content corresponding to the target linear element;
determining the display position corresponding to each character included in the marked content according to the line marking style and the marking position;
and displaying the corresponding characters included in the annotation content at the determined display position.
6. A map note data processing apparatus, characterized in that the apparatus comprises:
the acquisition module is used for acquiring a target linear element on a map;
the searching module is used for searching a line marking pattern and a point marking pattern corresponding to the target linear element, wherein a mode of selecting candidate positions for performing dispersed marking on the target linear element is defined in the line marking pattern, and the defined selecting mode is a uniform point selecting mode or a random point selecting mode; the point annotation pattern comprises background frame parameters required for annotating the annotated content;
a candidate position selecting module, configured to select a candidate position for labeling on the target linear element according to the line labeling style;
a candidate labeling area determining module, configured to obtain labeling content corresponding to the target linear element, read a size of a background frame used for displaying the labeling content in the point labeling style, extract, from the point labeling style, a distance between a boundary of a candidate labeling area obtained by expanding the background frame and a boundary of the corresponding background frame, and determine, according to the size of the background frame and the distance, a candidate labeling area corresponding to the candidate position;
a marking position determining module, configured to obtain a marking area that corresponds to the candidate position and is around the candidate marking area; filtering the candidate positions, wherein the position relation between the candidate labeling areas corresponding to the filtered candidate positions and the labeling areas around the corresponding candidate labeling areas meets an avoidance condition; acquiring an alternative position corresponding to the filtered candidate position, determining an alternative labeling area corresponding to the alternative position, and acquiring a labeling area which corresponds to the alternative position and is around the alternative labeling area; when the candidate marking region corresponding to the candidate position does not accord with the avoidance condition with the marking region around the candidate marking region, determining the marking position of the target linear element according to the candidate position corresponding to the filtered candidate position and the remaining candidate positions after filtering;
and the marking module is used for rendering a background frame for displaying the marked content at the marking position according to the point marking style, and displaying the marked content in the background frame.
7. The apparatus according to claim 6, wherein the candidate position selecting module is further configured to determine, according to the line marking pattern, a start coordinate on the target linear element for selecting a candidate position; sequentially selecting candidate coordinates from the initial coordinate according to length intervals included in the line marking pattern; and taking the candidate coordinates as candidate positions for marking on the target linear element.
8. The apparatus according to claim 6, wherein the annotation position determination module is further configured to select a candidate annotation region, where there is a candidate position of an overlapping region with the annotation region around the candidate annotation region; determining map elements corresponding to the labeling areas around the selected candidate labeling areas, which correspond to the selected candidate positions, have overlapping areas with the corresponding candidate labeling areas, and are positioned in the corresponding candidate labeling areas; acquiring the importance corresponding to the map elements and the importance corresponding to the target linear elements; and when the importance degree corresponding to the target linear element is greater than the importance degree corresponding to the map element, filtering out the selected candidate position.
9. The device of claim 6, wherein the tagging module is further configured to perform word segmentation on the tagged content to obtain tagged words; and displaying the label words in the background frame in a line.
10. The apparatus according to claim 6, wherein when the target linear element is a road line, the search module is further configured to search for a line marking pattern corresponding to the target linear element; the marking position determining module is further used for determining a marking position used for marking on the target linear element according to the line marking pattern; the labeling module is further used for acquiring the labeled content corresponding to the target linear element; determining the display position corresponding to each character included in the marked content according to the line marking style and the marking position; and displaying the corresponding characters included in the annotation content at the determined display position.
11. An electronic device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor realizes the steps of the method of any of claims 1 to 5 when executing the computer program.
12. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 5.
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