CN118229828A - Point-like ground object element symbol display method and device - Google Patents
Point-like ground object element symbol display method and device Download PDFInfo
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Abstract
The application discloses a dot-shaped ground object element symbol display method and device, which solve the problem of combining multiple graphic primitives into a dot-shaped ground object symbol and displaying the dot-shaped ground object symbol. The dot-shaped ground object element symbol display method comprises the following steps: acquiring a data cluster of the point symbol; determining a first coordinate point; the first coordinate point is a display position of the point symbol; the dynamic control code invokes at least a portion of the primitive data in the primitive group, displays the at least a portion of the primitive data, and forms a graph of the point symbol. The application realizes that a dot symbol can be expressed by various graphic primitives, character labels and other modes, namely, a plurality of symbol patterns are displayed on one dot in practice; the positioning point position of a point symbol is expressed according to any regular position of the symbol.
Description
Technical Field
The application relates to the technical field of data processing and geographic information databases of computers, in particular to a punctiform ground feature element symbol display method and device.
Background
The point ground feature (not according to the scale symbol) has various symbol pattern expressions, the size is regulated for unifying the symbol, the size comprises width, height, positioning point position and the like, the point symbol is also composed of various graphic elements, the comparison analysis is carried out, the analysis is carried out regularly, the direction of the symbol is divided into a direction point and a default direction point (with a preset direction, for example, the north is arranged), the direction is the angle of the point, and the angle can be an radian value or a degree/minute/second value. From the analysis of the expression effect of the points, the points can be divided into marked points and unmarked points (only the point symbols are adopted), and marked contents can be words, numerical values, and scores of combinations of molecules and denominators.
Each point symbol has a locating point according to the specification, namely, the origin (0, 0) of coordinates of the point symbol itself, namely, the abscissa and ordinate values are all 0. The symbol itself is described, such as points, lines, surface primitives, characters, etc. formed by embedding, and the relative position, relative length, relative offset, relative angle, etc. can be calculated according to the origin coordinates. The computer recognizes the rule and displays the graph, and each type of ground feature is regarded as a code, and the code is distinguished by attributes, including but not limited to layer names, colors, line widths and the like, so that various and multi-color punctiform ground feature symbols can be displayed, the symbol requirements of national standard drawings are met, and symbol color schemes can be converted according to actual production requirements. According to the symbols of the point ground feature, three types of point symbols are listed, which can be simply called default direction points (artificial stone mountain and water tower points), directional points (square rainwater grate and flow arrow), and markable points (high points, general elevation points, dam tops Gao Chengdian and triangular points).
How to realize the combination of expression point ground objects in various modes is a problem to be solved at present.
Disclosure of Invention
The application provides a dot-shaped ground object element symbol display method and device, which solve the problem of combining multiple graphic elements into a dot-shaped ground object symbol and displaying the dot-shaped ground object symbol.
In a first aspect, an embodiment of the present application provides a method for displaying punctiform surface feature element symbols, including:
acquiring a data cluster of the point symbol; the data cluster comprises dynamic control codes and static description data; the static description data comprises attribute values and primitive groups; the dynamic control code is used for displaying the graphic elements according to the static description data;
The primitive group includes at least one of the following primitive data: dot pattern element, line pattern element, surface pattern element and character label;
determining a first coordinate point; the first coordinate point is a display position of the point symbol;
the dynamic control code invokes at least a portion of the primitive data in the primitive group, displays the at least a portion of the primitive data, and forms a graph of the point symbol.
In one embodiment, the dot symbols are displayed in a predetermined direction.
In one embodiment, the method further comprises the steps of:
Determining a second coordinate point; the vector between the second coordinate point and the first coordinate point is used to determine the display direction of the dot symbol.
In one embodiment, in response to the inclusion of a text label in the primitive group, the method further comprises the steps of:
Determining at least one marking point;
And displaying the text label at the position of the label point.
In one embodiment, in response to the text contained in the data cluster being marked as a score, determining the score line specifically comprises the steps of:
Determining the minimum circumscribed rectangle of the numerator character and denominator character graph of the character label;
determining a score line; the relation between the length of the score line and the width of the minimum circumscribed rectangle accords with a preset rule.
In one embodiment, the preset rule for displaying the dot symbol includes color expression of the graphic element in the dot symbol;
The change of the dot symbol pattern is realized by changing a preset rule.
In one embodiment, determining the annotation point further comprises the steps of:
Modifying the positions of the marking points;
And refreshing the display position of the text label.
In a second aspect, an embodiment of the present application further provides a punctuation feature element symbol display device, where the punctuation feature element symbol display method according to any one of the embodiments of the first aspect includes: and the acquisition module is used for acquiring the data cluster of the point symbol. And the determining module is used for determining the first coordinate point. And the display module is used for dynamically controlling the code to call at least one part of the primitive data in the primitive group, displaying the at least one part of the primitive data and forming the graph of the point symbol.
In a third aspect, embodiments of the present application also provide a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements a method according to any of the embodiments of the first aspect.
In a fourth aspect, an embodiment of the present application further provides an electronic device, including a memory, a processor and a computer program stored on the memory and executable by the processor, where the processor executes the computer program to implement a method according to any embodiment of the first aspect.
The above at least one technical scheme adopted by the embodiment of the application can achieve the following beneficial effects:
The application realizes that a dot symbol can be expressed by various graphic primitives, character labels and other modes, namely, a plurality of symbol patterns are displayed on one dot in practice; the positioning point position of a point symbol is expressed according to any regular position of the symbol.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:
FIG. 1 is a flow chart of a method for displaying punctuation feature element symbols in an embodiment of the application;
FIG. 2-1 is a diagram illustrating a default directional point symbol for a pseudo-stone mountain according to an embodiment of the present application;
FIGS. 2-2 are exemplary diagrams of default directional point symbols for a water tower in accordance with embodiments of the present application;
FIG. 3-1 is a diagram of directional point symbols of a square rain grate according to an embodiment of the present application;
3-2 are diagrams of directional point symbols of flow arrows in accordance with embodiments of the present application;
FIG. 4 is a flow chart showing the display of Chinese character icons in a data cluster according to an embodiment of the present application;
FIG. 5 is a diagram of text labels according to an embodiment of the present application;
FIG. 6 is a flow chart of a display of a determination score line in accordance with an embodiment of the present application;
FIG. 7 is a schematic diagram of editing parameters of a feature element symbol according to an embodiment of the present application;
FIG. 8 is a schematic diagram showing a score line in accordance with an embodiment of the present application;
FIG. 9 is a diagram of an example of text labels after movement in accordance with an embodiment of the present application;
FIG. 10 is a diagram showing a construction of a dot-shaped ground object element symbol display device according to an embodiment of the present application;
fig. 11 is a schematic diagram of a business server system of an application scenario according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be clearly and completely described below with reference to specific embodiments of the present application and corresponding drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The following describes in detail the technical solutions provided by the embodiments of the present application with reference to the accompanying drawings.
It should be noted that, the feature element (national basic scale map drawing GB/T20257.1-2017) of the application is an abstraction of the actual geographic topography and geomorphic features, and is neither geographic mapping data itself nor an image of the original topography. For example, an element may appear as a type (e.g., lake, building) or an entity (e.g., cave lake, building). In the geographic information database, a symbolic representation of data that is a particular geographic feature. A symbol attribute includes a name, a data type, and a value range associated therewith. The elements are classified into dot symbol, face symbol, line symbol, complex symbol, and the like according to geometric features, and graphic codes are respectively assigned thereto.
The symbol ground feature element according to the present application is a composite symbol including a plurality of graphic elements. It should be noted that, instead of processing the original geographic image information to identify punctuation feature element symbol information features, the scheme of the present application creates and generates punctuation feature element symbols. The processing method of editing, copying, storing and using is further carried out, coordinate points are defined in the map, and then the positions of the coordinate points and the associated characteristics of the primitive types are utilized to form a data cluster of punctiform ground feature element symbols, so that the data structure of the geographic information database is optimized.
The application realizes that a dot symbol can be expressed by combining a plurality of modes such as dot elements, straight-line graphic elements, curve elements, circular arc graphic elements, surface graphic elements, character labels and the like, namely, a plurality of symbol patterns are displayed on one dot.
Fig. 1 is a flowchart of a method for displaying punctuation feature element symbols according to an embodiment of the present application, including the steps of: 110-130.
Step 110, acquiring a data cluster of a point symbol; the data cluster comprises dynamic control codes and static description data; the static description data comprises attribute values and primitive groups; the dynamic control code is used for displaying the graphic elements according to the static description data;
The point symbols are ground feature element symbols distributed in a pointing shape, the symbols of one ground feature element are displayed in a graphic mode, and the graphic of one ground feature element is positioned at a set position point.
The data cluster is data which belongs to a ground object code and describes the ground object. The ground object data cluster structure comprises associated dynamic control codes and static description data. Wherein the static description data contains various attribute values and primitive group information. The dynamic control code is used for driving the display module, and the display module compiles the dynamic control code into executable commands. The dynamic control code is expressed in terms of a set grammar and can be entered via GUI editing, including control program code for display. When the ground object data cluster is called, the editing module reads the primitive group information in the data cluster, and after the GUI edits the primitive group information, a new dynamic control code can be generated.
For example, the data cluster includes a dynamic control code and static description data under a feature identifier, where the static description data includes a primitive group embedded in the feature and an attribute value of each primitive in the primitive group. The dynamic control code generates or evolves a display graph corresponding to the static description data by responding to the static description data or GUI instructions. The primitive group includes at least one of the following primitive data: dot pattern element, line pattern element, face pattern element, and character label. The attribute values of the primitives may include: data representing the identity, location, scale, color, etc. of the graphical element.
Each feature element has independent static description data and dynamic control codes.
The dynamic control code contains indication information for configuring or activating the static description data. The configuration is to select, set or modify the types, the number and the attribute values of the primitive groups in the static description data; the activation is to cause a number of primitive group data in the static description data to drive a display. That is, the display is performed according to the kind, number, and attribute values of the primitive groups selected in the static description data.
Preferably, the dynamic control code may further include indication information for supplementing the static description data, where the supplementing refers to supplementing the types, the numbers and the attribute values of the primitive groups that are not included in the static description data.
Preferably, the dynamic control code may further include indication information for replacing the static description data, where the replacement refers to replacing at least a part of the primitive groups in the static description data with types, numbers and attribute values.
Preferably, the dynamic control code may further include indication information of a combination mode of each graphic element in the display graph of the feature element. When the symbol of the ground object element is formed by a plurality of primitives in the primitive group, different symbol patterns can be presented according to different combination modes.
Preferably, the dynamic control code may further include indication information of display effects of each graphic element in the display graph of the feature element. The indication information of the display effect is attribute data for supplementing or replacing the display effect of the related graphic element in the static description data.
Preferably, the dynamic control code may further include a program code for displaying the graphics (i.e. symbols) of the feature elements according to the indication information, and the program code is used for driving a display program running module capable of identifying the code, i.e. a display module.
It should be noted that, the data priority of the dynamic control code is higher than that of the static description data, and the data of the primitive may be stored in the static description data or may be stored in the dynamic control data. For example, if the data of the same primitive contains attribute data in both the dynamic control code and the static description data, and there is a conflict between the two, the attribute data in the dynamic control code is used to display the graphics.
In an embodiment of the present application, the editing module displays static description data or dynamic control codes of the data clusters, and edits at least a part of the data clusters. At this time, in response to the GUI, the static description data is changed, or various pieces of instruction information in the dynamic control code are changed or the program code is displayed. The data cluster of the dot symbol comprises associated dynamic control codes and static description data, wherein the static description data comprises various attribute values and primitive groups which can be used for constructing a dot symbol display graph; the dynamic control code is used for driving the display module, and the display module compiles the dynamic control code into executable commands. A primitive group of one dot symbol may be composed of one primitive or may be composed of a plurality of primitives. For example, a primitive group of a dot symbol is composed of one primitive, and there may be a plurality of primitives.
Step 120, determining a first coordinate point; the first coordinate point is a display position of the point symbol;
A coordinate point (i.e., a first coordinate point) is determined by the GUI instructions, and the point symbol is displayed according to the coordinates of the coordinate point.
The data of the first coordinate point may be stored in static description data or may be stored in a dynamic control code.
The first coordinate point stored in the dynamic control code has a higher priority than the first coordinate point stored in the static description data. The data of the first coordinate is dynamic control code, the attribute value can be changed in an editing way, and the attribute value of the static description data can be changed in an editing way or not.
For example, as shown in fig. 2-1, the symbolized display of the artificial stone mountain, the symbolized display after being selected and the positioning point entity display effect are respectively from top to bottom.
For example, as shown in fig. 2-2, the symbolized display of the water tower, the symbolized display after being selected and the positioning point entity display effect are respectively from top to bottom.
The symbolized display means that the dynamic control code calls at least a part of the primitive data in the primitive group, displays the at least a part of the primitive data, and forms a display graph of the symbol.
The symbolized display after being selected means that the display graph is represented in a dotted line mode when the ground feature element is selected in the GUI instruction.
The positioning point is the first coordinate point and is the display position of the point symbol, and the entity display effect according to the positioning point is that the display position of the point symbol is displayed in the form of a point element.
And 130, the dynamic control code calls at least one part of the primitive data in the primitive group, displays the at least one part of the primitive data and forms the graph of the point symbol.
The at least one part refers to part or all of the primitive data.
When the at least one part of primitive data is displayed, corresponding to the indication information in the dynamic control code in step 110, the primitive data in the static description data is configured and/or supplemented, so that the corresponding primitive data is activated.
When the ground object data cluster is called, the editing module reads the primitive group information in the data cluster, and after the GUI edits the primitive group information, a new dynamic control code can be generated.
The preset rule is a display rule of different primitive data in the point symbol, for example, a display direction of the primitive in the point symbol, a position relationship between the primitive and a coordinate point of the point symbol, and a display effect of the primitive such as color.
It should be noted that, as shown in fig. 2-1 and 2-2, the positioning points 21 and 22 (i.e., the first coordinate points) of the dot symbol in the drawings are not located at the exact center of the dot symbol, nor at the center of the bottom edge of the dot symbol.
In one embodiment, in step 130A, the dot symbol is displayed according to a preset direction. The embodiment realizes convenient drawing of the directional points and the points in the default direction.
Preferably, if the dot symbol is a dot in the default direction, only the first coordinate point needs to be determined, and the dot symbol is displayed in the preset direction.
The indication information of the preset direction can be static description data or dynamic control codes, and the priority of the preset direction indication information in the dynamic control codes is higher than that of the preset direction indication information in the static description data.
The data of the indication information of the preset direction can be an attribute value in a dynamic control code, can be changed in an editing way, or can be an attribute value in static description data, and can be configured to be changed in an editing way or not according to the requirement.
Further preferably, the preset direction is a default display direction in which the dot symbol does not pass through the GUI instruction.
Further preferably, the shapes of the primitive components constituting the dot symbol are different, and the preset directions are different.
To further understand the meaning of the display direction, for example, the display pattern of the dot symbol is a circle, and the display pattern is undirected, the preset direction is not required to be defined.
For another example, the displayed graphic of the dot symbol is an arrow, and the displayed graphic is directional, and there is a preset direction, and the preset direction may be a direction pointed by the arrow or a direction pointed by an opposite direction pointed by the arrow.
Also, for example, the dot symbol is rectangular in shape, and the display pattern is directional, and there is a predetermined direction. For example, the preset direction determines the direction in which the longitudinal direction or the width direction of the rectangle refers.
After the terminal operates, the symbols of different ground feature elements generated by the display module are stored in the form of data clusters of point symbols, and the graphical evolution of the generated ground feature element symbols is realized through the evolution of dynamic control codes. And embedding various primitive data into the point symbol, editing indication information or display program codes in the dynamic control codes, and driving the dynamic control codes to display through the static description data.
For example, the dynamic control code confirms the directionality of the dot symbol pattern itself, and associates the north-south east-west direction of the map with the directionality of the dot symbol pattern by a preset rule, and displays the dot symbol on the map in the determined display direction.
In one embodiment, in step 130, a vector direction passing through the first coordinate point is determined as a display direction of the dot symbol, and the position point of the dot symbol is a directional point.
For example, determining a second coordinate point; the vector between the second coordinate point and the first coordinate point is used to determine the display direction of the dot symbol.
The GUI instruction for determining the second coordinate point may be to determine a point as the second coordinate point by clicking the mouse at any position other than the first coordinate point, or may be to suspend the mouse outside the first coordinate point after determining the first coordinate point, and determine a vector with the first coordinate point by using the suspended position as the second coordinate point.
The number of the determined coordinate points is two, the first coordinate point is a point symbol display position, and the second coordinate point is used for determining the display direction of the point symbol.
The directional point determines its locating position when the first point (coordinate point) is plotted, and the second point is plotted to determine its direction. The second point is only used to determine the direction, which is actually still the point of one node.
The directional points are directional and unlabeled point symbols.
For example, as shown in fig. 3-1, the symbolized display of the square rain grate, the symbolized display after being selected and the entity display effect according to the positioning point are respectively performed from top to bottom, and the positioning point of the square rain grate can be seen to be at the center of the symbol.
As another example, as shown in fig. 3-2, from top to bottom, the symbolized display of the flow arrow, the symbolized display after being selected, and the entity display effect of the anchor point are respectively displayed, and the anchor point of the flow arrow can be seen to be at the tail position of the arrow symbol.
As can be seen from fig. 2 and 3, the first coordinate point of the point symbol is used for locating the position of the point symbol, but the positional relationship between the primitive and the first coordinate point in the point symbol is determined according to a preset rule.
The symbolized display, the symbolized display after being selected, and the entity display at the anchor point in fig. 2 and 3 are operated by GUI instructions and can be converted from each other.
The positioning point position of a point symbol is expressed according to any regular position of the symbol, such as the center of the symbol, the center of the lower edge, the center of the upper edge and the like, and can completely meet the specification of standards such as GB/T-20257.1 (2, 3) and the like.
Step 130C, in one embodiment of the present application, in step 130, the change of the dot symbol pattern is implemented by changing the preset rule.
For example, the preset rule for displaying the dot symbol comprises a color representation of the primitive in the dot symbol;
The preset rule of colors contains color expressions of primitive attribute values in static description data. Color representations of primitive attribute values in dynamic control code may also be included. The dynamic control code has a higher priority than the static description data, and the attribute value of the dynamic control code may be editable, and the attribute value of the static description data may or may not be editable and changed.
For example, when a dynamic control code driven by static description data runs in the first terminal in accordance with a control string edited by a set syntax, the static description data may be edited. By editing the static description data, the colors of the primitives in the map display dot symbol are modified. However, when the system runs in the second terminal, the static description data cannot be edited, and at the moment, the colors of the primitives in the map display point symbol are modified by editing the dynamic control codes.
For another example, the preset rule for displaying the dot symbol includes a positional relationship of the graphic element in the dot symbol;
The preset rule of the position relation comprises the position relation expression of the primitive attribute value in the static description data. Positional relationship expressions of primitive attribute values in dynamic control code may also be included. The dynamic control code has a higher priority than the static description data, and the attribute value of the dynamic control code may be editable, and the attribute value of the static description data may or may not be editable and changed.
For example, when a dynamic control code driven by static description data runs in the first terminal in accordance with a control string edited by a set syntax, the static description data may be edited. And modifying the position relation between the graphic element and the positioning point in the map display point symbol by editing the static description data. When the system runs in the second terminal, the static description data can not be edited, and the position relation between the graphic element and the positioning point in the map display point symbol is modified by editing the dynamic control code.
The graphical style of the symbol is changed by changing the positional relationship of the primitives.
For example, the cross symbol and the mouth symbol each include four line symbols, but the positional relationship between each line symbol and the anchor point is different, so that the patterns of the two symbols are different.
Change of preset rules:
the preset rule comprises the expression of preset primitive groups in static description data and also comprises selected primitive groups in dynamic control codes, wherein the priority of the dynamic control codes is higher than that of the static description data, the attribute values of the dynamic control codes can be edited, and the attribute values of the static description data can be changed and/or can not be edited.
For example, when a control string edited according to a set syntax in a dynamic control code driven by static description data is run in the first terminal, the static description data at this time may be edited. And modifying the preset rule of the map display point symbol by editing the static description data.
For another example, the static description data is not editable while the second terminal is running, and the preset rule is changed by editing the dynamic control code.
For example, creating point symbols, generating original symbols, statically describing the editing process of data, and optionally editing data clusters of point symbols to form different symbols. For another example, after the control string edited according to the set grammar is run in the terminal, a different symbol is displayed.
Fig. 4 is a flowchart showing a method for displaying a Chinese character in a data cluster according to an embodiment of the present application, including steps 210 to 230.
Step 210, acquiring a data cluster of a point symbol;
For example, the data cluster includes a dynamic control code and static description data under a feature identifier, where the static description data includes a primitive group embedded in the feature and an attribute value of each primitive in the primitive group.
Specifically, for example, the primitive group includes a dot primitive, a line primitive, a face primitive, and a text label, and is used for constructing a specific primitive that displays label information, such as a lead-out line, a score line, an identifier, a triangle, and a prompt.
For example, the attribute values of the primitives may include: and constructing data representing the identification, the position, the scale, the color and the like of the graphic elements of the labeling information.
In order to implement the text labeling of this embodiment, the static description data includes: marking points, character marking and attribute information of score lines. The primitive group comprises: text labels and primitives of score lines.
The dynamic control code generates or evolves a display graph corresponding to the static description data by responding to the static description data or GUI instructions.
In one embodiment of the application, at least a portion of the primitive data in the primitive group that the dynamic control code invokes contains a literal label.
The dynamic control code includes:
The method comprises the steps of configuring or activating static description data, supplementing the static description data, replacing the static description data, indicating the combination mode of all the primitives in the display graph of the feature elements, indicating the display effect of all the primitives in the display graph of the feature elements, and displaying the graph (namely, the symbol) of the feature elements according to the indicating information.
In order to implement the text labeling of this embodiment, the dynamic control code includes indication information for configuring, activating, supplementing, replacing, combining and displaying the labeling points, text labels and score lines, and also includes program code for displaying text labels.
Step 220, determining a first coordinate point; the first coordinate point is the display position of the point symbol, and at least one marking point related to the first coordinate point is determined;
Determining at least one marking point;
The dot symbol may have a plurality of the noted points, e.g., high elevation points, dam tops Gao Chengdian, triangular points, for expressing different symbol requirements.
Determining the marking point, and further comprising the steps of:
Modifying the positions of the marking points;
The positions of the marking points can comprise preset positions in static description data and can also comprise positions selected in dynamic control codes.
The priority of the dynamic control code is higher than that of the static description data, so that the positions of the marking points in the dynamic control code are edited, and the positions selected by the dynamic control code are used for replacing the preset positions or the positions selected by the static description data.
The attribute values of the dynamic control code may be editable, and the attribute values of the static description data may or may not be editably changed.
For example, when a dynamic control code driven by static description data runs in the first terminal in accordance with a control string edited by a set grammar, the static description data of the mark point position may be edited. When the second terminal operates, the static description data of the positions of the marking points can not be edited, and at the moment, the display rules are modified by editing the dynamic control codes, so that the positions of the marking points are changed.
As can be seen by comparing fig. 5 and fig. 9, the position of the text label is changed, and the display position of the text label can be modified by dragging the label point.
For example, the location of the annotation point is modified by dragging the annotation point via a GUI instruction.
And refreshing the display position of the text label.
Text labels are generated at new label point locations.
Or when the character label is dragged, the character label is dragged to a new position along with the label point.
In response to the text contained in the data cluster being marked as a score, determining the score line specifically comprises the steps of:
step 610, determining the minimum circumscribed rectangle of the numerator character and denominator character graph of the character label;
Step 620, determining a score line; the relation between the length of the score line and the width of the minimum circumscribed rectangle accords with a preset rule.
The preset rule is a display rule of different primitive data in the point symbol.
Further, the preset rule further comprises a display rule of scores in the text labels; the display rules of the score include display rules of score lines.
As shown in fig. 6, the preset rule of the score line may be static description data or dynamic control code, and the priority of the dynamic control code is higher than that of the static description data.
The data is an editable change for a dynamic attribute value, and a static attribute value may or may not be editable change.
Step 230, the dynamic control code invokes at least a portion of the primitive data in the primitive group, displays the at least a portion of the primitive data, forms a graph of the dot symbol, and displays a text label at the position of the label dot.
And displaying the text label at the position of the label point.
For example, as shown in fig. 5, the noted dot symbols are respectively: high points 51, general elevation points 52, dam top elevation points 53, and triangular points 54. Symbolized display (up). And displaying (middle) symbolized after being selected, and displaying (lower) the effect according to the entity of the mark point.
The symbolized display refers to a display pattern for dynamically controlling the ground feature elements.
The symbolized display after being selected means that the display graph is represented in a dotted line mode when the ground feature element is selected.
The display effect of the entity according to the positioning point is that the display position of the point symbol is displayed in the form of a point element.
In special cases, the pattern of a dot symbol is degraded into a locating point plus a text label at the location of the labeled dot.
Further, the display direction of the text label is determined according to the point with the dot symbol being directional or the point with the default direction.
Further, regarding the rule of displaying the score line, for example, the triangle point symbolizing display, as shown in the right-most diagram of fig. 5, after the elevation value of the triangle point is changed, the denominator of the text label is shortened or lengthened, and as the denominator is shortened or lengthened, the minimum circumscribed rectangle length direction of the numerator character and the denominator character pattern is shortened or lengthened, so that the score line is automatically shortened and lengthened along with the elevation value change.
As shown in fig. 7, the preset rule is determined according to the parameters depicted by the symbols in the figure.
Taking the display of score lines as an example, the parameters depicted by the symbols in the figures are:
G,110102101 0.000,0.000
&T,1990001,<N>8.500,2.000
&T,1990002,<ZZZZ.ZZZ>8.500,-2.000
&1,110102103 [0,3,0.5,0.5,0.0] [1,2,0.5,-0.5,0.0]
The four points of the minimum circumscribed rectangle 82 marked by the text are set as four points of 0, 1,2 and 3, and '0,3,0.5,0.5,0.0' in the above parameters is in the preset rule of identification: 0,3,0.5, which indicates that one end of the score line 81 is set at 0.5 at both points 0 and 3, i.e., at the center. The latter 0.5 represents the left-right offset of this end of the score line on the line connecting 0 and 3. Where positive is biased to the left and negative is biased to the right, so 0.5 here means that the end of the score line is biased 0.5 units to the left at the line of 0 and 3. The last 0.0 label indicates the up-down shift of the digit line, positive for upward shift and negative for downward shift.
"1,2,0.5, -0.5,0.0" In the above parameters is the positional relationship between the line connecting the two points of 1 and 2 and the other end of the score line. The reading is identical to the foregoing and will not be repeated here.
Here 0.0 means no up-down offset. The resulting score line is shown in fig. 8.
The minimum bounding rectangle in the drawing is shown for ease of understanding, and there is no actual figure in practice.
It should be noted that, the parameter described by the symbol in the figure is the dynamic control code of the dot symbol, and the display rule of the primitive in the dot symbol is modified by editing the parameter.
Fig. 10 is a schematic diagram of a dot-shaped ground object element symbol display device according to an embodiment of the present application, where the dot-shaped ground object element symbol display method according to any one of the embodiments of the first aspect includes:
a geographic information database/outcome map database 100 for storing data of point symbols in the target area and static description data and dynamic control codes of the first coordinate points.
An acquisition module 101, configured to acquire a data cluster of a dot symbol.
A determining module 102, the determining module comprising a first determining unit for determining a first coordinate point.
And the display module 103 comprises a first display unit, and is used for dynamically controlling the code to call at least one part of the primitive data in the primitive group, displaying the at least one part of the primitive data and forming the graph of the point symbol.
In one embodiment, the determining module includes a second determining unit configured to determine a vector formed with the first coordinate point.
In one embodiment, the determining module includes a third determining unit, configured to determine a labeling point;
the display module comprises a second display unit for displaying text labels at the positions of the labeling points.
In one embodiment, the display module includes a score line display unit, configured to display a score line by determining a minimum circumscribed rectangle of the numerator character and denominator character graphic of the text label; determining a score line; the score line is positioned between the numerator and the denominator of the character label, and the relation between the score line and the minimum circumscribed rectangle accords with a preset rule.
In one embodiment, the display module includes a style display unit, and the preset rule for displaying the dot symbol at the coordinate point includes color expression of a primitive in the dot symbol; and is also used for realizing the change of the dot symbol pattern by changing the preset rule.
In one embodiment, the determining module includes a fourth determining unit for modifying the location of the annotation point in response to the GUI instructions; and refreshing the display position of the text label.
The device further comprises an editing module (not shown in the figure) for reading the tuple information in the data cluster, and generating a new dynamic control code after the GUI edits the tuple information.
In particular, static description data and/or dynamic control data are modified, at least a part of the primitive data in the primitive group is changed, and then the graph forming the point symbol is changed.
As shown in fig. 7, the editing module includes a coding property description and a symbol description, where the coding property description specifically includes: name, line type, epsCE code, layer, line width, use, code, color, additional information, symbol type, object type, remark, alias, thickness, coded control information. Also contains instructions for breaking up, filtering and reversing.
And the symbol description receives the input control character string through the interactive window as a GUI instruction, and modifies the dynamic control code by editing the symbol description in the interactive window, thereby realizing the editing modification of the point symbol graph.
FIG. 11 is a schematic diagram of a business server system of an application scenario of the present application. The embodiment of the application also provides a processing system of the geographic information data, which is used for realizing the method of any one embodiment of the application, and comprises the following steps: an original geographic information database 111, a data processor 112, a GUI operation interface 113, an application terminal 114, at least one outcome map database 115.
The original geographic information database is used for storing geographic information entity data.
The GUI operation interface and/or the application terminal are used for inputting setting conditions. And triggering the acquisition module, the determination module, the editing module or the display module. And is also used for accessing the result data set according to the set application range (the space range and the attribute range) to acquire data. And receiving a GUI instruction through a GUI operation interface, determining the position coordinates of the coordinate points, and determining the display positions of the symbols according to the coordinates. The data processor responds to the instruction of the GUI and acquires the data cluster of the point symbol; determining a first coordinate point; the dynamic control code invokes at least a portion of the primitive data in the primitive group, displays the at least a portion of the primitive data, and forms a graph of the point symbol.
The result graph data set is used for storing geographic information related data.
The generation of the geographic information database ground object element template is realized through a GUI operation interface and/or an application terminal:
The feature element template is an original data cluster for generating various features of an original geographic information database and comprises a plurality of primitives. Static description data is created, the static description data containing attribute values and primitive groups containing primitives that make up the template.
For example, the artificial stone mountain (left) ground element template shown in fig. 2-1 includes at least two surface elements (forming a triangle with a large size and a small size), and two line elements (vertical lines respectively arranged in the middle of the two surface elements).
The attribute value is an attribute of a primitive constituting the template, for example, a size parameter of the primitive, a color of the primitive, a positional relationship between the primitive and a coordinate point, and the like.
The ground feature element template may further include location information of the graphic element, for example, as shown in fig. 2-1, two isosceles triangles are arranged side by side, and the bases of the triangles are on the same line. A connecting line is arranged from the top of each triangle to the midpoint of the bottom.
It should be noted that, one feature element template may be used for evolving into a data cluster of multiple feature elements, and the more feature elements that can evolve, the more primitive information that is contained. It will be appreciated that a generic ground feature element template can be designed for use in developing all types of ground feature elements. Or in order to reduce the data volume of one ground feature element template, a plurality of ground feature element templates can be designed, each ground feature element template is applicable to ground feature elements in a certain range, or a data cluster of a specific ground feature element is selected, so that the ground feature element template of the geographic information database is formed.
A specifically encoded surface feature element template may be generated, obtained, or edited. For example, the geographic information database ground element template is encoded as X.
The method can also realize the process of editing the ground feature elements of the original geographic information database through the GUI operation interface and/or the application terminal, and modify the static description data and the dynamic control codes through editing. The data clusters of a specific feature element are formed by recombination.
For example, modifying the attribute value in the static description data or modifying the dynamic control code, so as to modify the size, color and position relation between the coordinate point and at least one primitive in the primitive group, and further change the feature elements of the original geographic information database.
For another example, the static description data feature code field of the feature element code is Y, and the dynamic control code field of the feature element is Z.
Specifically, the object identifier may be represented as CODE (X, Y, Z), that is, the CODE value is a CODE corresponding to one object element of (X, Y, Z), and (Y, Z) is indicating information (identifier or pointer) of a data cluster or a data cluster constituting the object element.
The application process of the original geographic information system database ground feature elements can be realized through the GUI operation interface and/or the application terminal, so that the original geographic information system database ground feature elements are different from the editing process of the ground feature elements, at the moment, the static description data cannot be edited, the dynamic control codes can be edited, that is, the process limitation is carried out in the editing module, the response of the updating function of the static description data to the GUI is enabled or disabled, and the ground feature element template or a edited specific ground feature element is protected.
For example, static description data may be edited when retrieving a feature element data cluster. When the control code operates in the terminal according to the control character string edited by the set grammar, the static description data can not be edited, and only the dynamic control data can be edited. It will be appreciated that different dynamic control codes may be applicable to different surface features, or to different display states of the same surface feature, to support a variety of engineering applications.
For another example, when the original geographic information database calls the ground object element data cluster from the application data set, static description data of the data cluster is triggered, when the static description data works, a control character string edited according to a set grammar in a dynamic control code driven by the static description data corresponds to corresponding engineering management software, and the engineering management software runs in an application terminal. And editing the static description data and the dynamic control codes of the data clusters after operation, and storing the static description data and the dynamic control codes in a result graph database.
It should be noted that, by editing the static description data and the dynamic control code of the data cluster, the attribute of the feature is modified, so as to form a new feature element.
For example, by editing static description data and dynamic control codes of the data clusters, the preset directions of the dot symbols are modified, so that the ground feature elements with different display directions are formed. And if the preset direction of the point symbol is not modified, adopting the direction in the original geographic information database as the preset direction.
For example, by editing static description data and dynamic control codes of the data clusters, a marking point is determined, so that the display position of the text marking is determined.
For example, the display condition of the score line is determined by editing static description data and dynamic control codes of the data cluster.
Determining a color representation of the primitive data in the point symbol, for example, by editing static description data and dynamic control code of the data cluster;
For example, by editing the static description data and dynamic control code of the data clusters, the graphical changes of the primitive data in the point symbols are determined.
For example, by editing static description data and dynamic control codes of the data clusters, the positions of the annotation points are modified, and the display positions of the text annotations are refreshed.
It is to be understood that the above list of specific relevance is for illustrative purposes only and should not be taken as limiting the application in any way.
The specific method for implementing the above module function is described in the embodiments of the methods of the first aspect of the present application, and will not be described herein.
It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention 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, and the like) having computer-usable program code embodied therein.
The application therefore also proposes a computer-readable storage medium, on which a computer program is stored, which program, when being executed by a processor, implements a method according to any of the embodiments of the application.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Further, the present application also proposes an electronic device (or computing device) comprising a memory, a processor and a computer program stored on the memory and executable by the processor, said processor implementing a method according to any of the embodiments of the present application when said computer program is executed.
In one typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory. The memory may include volatile memory in a computer-readable medium, random Access Memory (RAM) and/or nonvolatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). Memory is an example of computer-readable media. Computer readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of storage media for a computer 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 Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium, which can be used to store information that can be accessed by a computing device. Computer-readable media, as defined herein, does not include transitory computer-readable media (transmission media), such as modulated data signals and carrier waves.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element. The term "at least one" in the present application includes one or more.
The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and variations of the present application will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the application are to be included in the scope of the claims of the present application.
Claims (10)
1. A dot-shaped ground object element symbol display method is characterized by comprising the following steps:
acquiring a data cluster of the point symbol; the data cluster comprises dynamic control codes and static description data; the static description data comprises attribute values and primitive groups; the dynamic control code is used for displaying the graphic elements according to the static description data;
The primitive group includes at least one of the following primitive data: dot pattern element, line pattern element, surface pattern element and character label;
determining a first coordinate point; the first coordinate point is a display position of the point symbol;
the dynamic control code invokes at least a portion of the primitive data in the primitive group, displays the at least a portion of the primitive data, and forms a graph of the point symbol.
2. The method of displaying punctuation feature element symbols according to claim 1, wherein the punctuation symbols are displayed in a predetermined direction.
3. The method of displaying punctuation marks of ground object elements according to claim 1, further comprising the steps of:
A vector direction passing through the first coordinate point is determined as a display direction of the point symbol.
4. The method of displaying punctuation feature element symbols of claim 1, further comprising the steps of, in response to the inclusion of a text label in the primitive group:
Determining at least one marking point;
And displaying the text label at the position of the label point.
5. The method of displaying punctuation feature element symbols of claim 1, wherein determining a score line specifically comprises the steps of:
Determining the minimum circumscribed rectangle of the numerator character and denominator character graph of the character label;
determining a score line; the relation between the length of the score line and the width of the minimum circumscribed rectangle accords with a preset rule.
6. The method for displaying dot-shaped ground object element symbols according to claim 1, wherein the preset rule for displaying the dot-shaped symbols comprises color expression of primitives in the dot-shaped symbols;
The change of the dot symbol pattern is realized by changing a preset rule.
7. The method of displaying punctuation feature element symbols of claim 4, wherein determining the annotation point further comprises the steps of:
Modifying the positions of the marking points;
And refreshing the display position of the text label.
8. A punctuation feature element symbol display device, characterized in that it uses the punctuation feature element symbol display method according to any one of claims 1 to 7, comprising:
the acquisition module is used for acquiring the data cluster of the point symbol;
A determining module, configured to determine a first coordinate point;
and the display module is used for dynamically controlling the code to call at least one part of the primitive data in the primitive group, displaying the at least one part of the primitive data and forming the graph of the point symbol.
9. A computer readable storage medium, on which a computer program is stored, characterized in that the program, when being executed by a processor, implements the method according to any of claims 1-7.
10. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the method of any of claims 1-7 when executing the computer program.
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| CN1731475A (en) * | 2005-06-08 | 2006-02-08 | 武汉虹信通信技术有限责任公司 | Method for realizing dynamic point ground feature annotation of GIS |
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