CN110930857A - Method and device for drawing scattered points - Google Patents
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Abstract
The invention relates to the technical field of data processing, in particular to a method and a device for drawing scatter points, wherein the method comprises the following steps: the method comprises the steps of obtaining geographic coordinates of a plurality of engineering machines, converting the geographic coordinates into plane coordinates corresponding to a map selected by a user, wherein the plane coordinates comprise a first plane coordinate and a second plane coordinate, the first plane coordinate represents the engineering machines in a non-working state, the second plane coordinate guarantees the engineering machines in a working state, finally, the first plane coordinate and the second plane coordinate are drawn on different layers in a scattered point mode according to a preset frequency in sequence, and all the layers are displayed in an overlapping mode. The geographic coordinate of this scheme can be according to the planar coordinate that different maps convert the adaptation, and the range of application is wider, according to predetermined frequency when playing up planar coordinate simultaneously, is unlikely to the volume of playing up too big, leads to the picture card to pause, has guaranteed the effect of playing up.
Description
Technical Field
The invention relates to the technical field of data processing, in particular to a method and a device for drawing scattered points.
Background
At present, a scatter diagram showing engineering machinery distribution dynamics is drawn by adopting a geographic information visualization open source library MapV, the MapV plug-in is a plug-in produced by a Baidu company, the MapV plug-in must be matched with a Baidu map for use, and with the increase of the number of scattered points representing the engineering machinery, after more than 10 ten thousand scattered points are reached, a rendered page becomes very stuck, and the time for opening the page is further prolonged until a browser crashes. Therefore, it is necessary to provide a new method for rendering scatter points to adapt to different maps while ensuring rendering efficiency.
Disclosure of Invention
The invention aims to provide a method for drawing scatter points, which is suitable for different maps and ensures the rendering effect.
Another objective of the present invention is to provide a device for drawing scatter points, so as to adapt to different maps and ensure the rendering effect.
In order to achieve the above purpose, the embodiment of the present invention adopts the following technical solutions:
in a first aspect, an embodiment of the present invention provides a method for drawing a scatter, where the method includes: acquiring geographic coordinates of a plurality of engineering machines; converting the geographic coordinates to planar coordinates corresponding to a selected map, the planar coordinates including a first planar coordinate and a second planar coordinate; the first plane coordinate represents the engineering machinery in a non-working state, and the second plane coordinate represents the engineering machinery in a working state; and respectively drawing the first plane coordinate and the second plane coordinate on the layers in a scatter point mode according to a preset frequency, and superposing and displaying all the layers.
In a second aspect, an embodiment of the present invention further provides an apparatus for mapping a scatter point, where the apparatus includes: the receiving and transmitting module is used for acquiring geographic coordinates of a plurality of engineering machines; a processing module for converting the geographic coordinates to planar coordinates corresponding to a selected map, the planar coordinates including a first planar coordinate and a second planar coordinate; the first plane coordinate represents the engineering machinery in a non-working state, and the second plane coordinate represents the engineering machinery in a working state; and respectively drawing the first plane coordinate and the second plane coordinate on different layers in a scatter point mode according to a preset frequency, and superposing and displaying all the layers.
The embodiment of the invention provides a method and a device for drawing scattered points, wherein the method comprises the following steps: the method comprises the steps of obtaining geographic coordinates of a plurality of engineering machines, converting the geographic coordinates into plane coordinates corresponding to a map selected by a user, wherein the plane coordinates comprise a first plane coordinate and a second plane coordinate, the first plane coordinate represents the engineering machines in a non-working state, the second plane coordinate guarantees the engineering machines in a working state, finally, the first plane coordinate and the second plane coordinate are sequentially drawn on different layers in a scattered point mode according to a preset frequency, and finally, all the layers are overlaid and displayed. The geographic coordinate of this scheme can be according to the planar coordinate that different maps convert the adaptation, and the range of application is wider, according to predetermined frequency when playing up planar coordinate simultaneously, is unlikely to the volume of playing up too big, leads to the picture card to pause, has guaranteed the effect of playing up.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic flow chart illustrating a method for drawing scatter according to an embodiment of the present invention.
Fig. 2 is a functional block diagram of an apparatus for mapping scatter according to an embodiment of the present invention.
The figure is as follows: 200-a device for drawing scatter; 210-a transceiver module; 220-processing module.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present invention, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
The engineering machinery is a large-scale machine mainly applied to construction sites, such as a crane and the like, is widely applied to areas needing construction, can know which areas are more constructed and have large infrastructure requirements by monitoring the distribution condition of each engineering machinery, and further can set a service network point in the areas. Therefore, the geographical coordinates sent by the sold working machines can be displayed on the map in a centralized manner, so that the distribution state of the working machines can be known conveniently, and reference can be provided for implementation of subsequent strategies. The method for drawing the scattered points is a method for visually displaying the geographical coordinates of the engineering machinery, is suitable for different maps, gradually renders according to a certain frequency, and ensures the rendering effect.
Fig. 1 is a schematic flow chart of a method for drawing scatter plots according to an embodiment of the present invention, where the method includes:
s110, geographic coordinates of a plurality of engineering machines are obtained.
Specifically, the construction machine is generally sold to different regions, but each construction machine is provided with a control device, a positioning device and a communication module, the positioning device is mainly a device capable of acquiring geographic coordinates of the construction machine, such as a GPS module, the control device is a processing chip capable of processing the geographic coordinates and working state data of the construction machine, and the communication module is a module for sending out the geographic coordinates and the working state data of the construction machine, and may be, but not limited to, an SIM card.
Further, the system connected to the work machine may receive the geographical coordinates (i.e., the longitude and latitude of the work machine) and the operation status data (i.e., whether the work machine is in operation) sent from the communication module on the work machine. The geographical coordinates can reflect the distribution states of the engineering machinery in different areas, and the working state data can reflect the use conditions of the engineering machinery in different areas, if more engineering machinery is in working state, the larger the use amount of the engineering machinery is, the more frequent the infrastructure of the area is, and further the demand of the engineering machinery is large.
And S120, converting the geographic coordinates into plane coordinates corresponding to the selected map, wherein the plane coordinates comprise a first plane coordinate and a second plane coordinate, the first plane coordinate represents the engineering machinery in the non-working state, and the second plane coordinate represents the engineering machinery in the working state.
Specifically, the method provided by the embodiment of the invention is not limited to map types, namely, the method is suitable for all maps, and the acquired geographic coordinates of the engineering machinery need to be converted into plane coordinates matched with the selected map through a projection algorithm due to different coordinate precisions of different maps. Further, the plane coordinates are divided into a first plane coordinate and a second plane coordinate according to the working state data of the engineering machinery, the first plane coordinate represents the engineering machinery in a non-working state, such as the engineering machinery which does not work or has a fault, and the second plane coordinate represents the engineering machinery in a working state, i.e. the engineering machinery which is working. And the two types of plane coordinates are drawn and displayed in a distinguishing way subsequently, so that a user can visually know the state of the engineering machine and more effective information is provided for making a strategy.
S130, respectively drawing the first plane coordinate and the second plane coordinate on different layers in a scatter point mode according to a preset frequency, and superposing and displaying all the layers.
Specifically, because the number of the engineering machines is huge, the number of the plane coordinates obtained through conversion is also huge, and if a large number of plane coordinates are rendered at one time, the problems of page blockage, frame skipping and the like are caused, so that the embodiment of the invention gradually renders the plane coordinates according to the preset frequency, for example, renders the plane coordinates at the frequency of 3000 scattered points per frame, and the preset frequency can be configured according to the user requirements, so as to achieve a better display effect. The invention adopts a canvas method to draw plane coordinates in a scattered point form, and the specific implementation mode is as follows:
the first plane coordinate is drawn on the first layer of map layer (i.e. the first canvas layer) in a scattered point form, and the first plane coordinate represents the engineering machinery in a non-working state, so that the scattered point can be drawn by using a darker color, such as grey.
The second plane coordinate is drawn on the second layer of the layer (i.e. the second canvas layer) in a scatter point form, and at this time, only the ground color of the second plane coordinate is drawn on the second layer of the layer, further, because the second plane coordinate represents the engineering machinery in a working state, in order to perform the differential display, the scatter point of the second plane coordinate is subjected to the pattern setting, that is, the scatter point type of the second plane coordinate is drawn on the third layer of the layer, and the pattern setting mode comprises: and randomly selecting second plane coordinates in a plurality of second layer image layers every frame, and drawing points in a high brightness state at corresponding positions so as to ensure that the points in the high brightness state can directly cover the second plane coordinates of the second layer image layers at the same positions. Meanwhile, a rectangle with extremely low transparency is drawn to cover the third layer of layer through canvas synthetic attributes, so that the transparency of the highlight flash point drawn before is reduced, the highlight flash point drawn before after a plurality of frames is gradually faded down, and the second plane coordinate on the second layer of layer becomes more and more obvious. Further, a nearly fully transparent rectangle is drawn each frame to cover the entire canvas layer, and the drawn highlight is continuously darkened to adjust the brightness of the scatter point.
And then, the first layer image layer, the second layer image layer and the third layer image layer are displayed in an overlapping mode, and scattered points of a representation with darker colors in a non-working state and scattered points of a representation with brighter colors in a working state can be displayed in an overlapping mode.
If the user moves (such as drags) the layer in the drawing process, stopping drawing the first plane coordinate and the second plane coordinate in the layer in a scattered point mode in response to the moving operation of the user on the layer so as to avoid the pause of the user in the dragging process and resuming the drawing after the user stops the moving operation on the layer. In addition, a user can select any one area in the map layer through a regular graph or an irregular graph, and as the scheme converts the geographic coordinate of the engineering machinery into a planar coordinate and marks the planar coordinate on the map, the user can know which engineering machinery is specifically included in the area, and the method is different from the prior art that after the area is selected, the user needs to know the longitude and latitude of the area first to compare the longitude and latitude with the longitude and latitude of the engineering machinery according to the longitude and latitude so as to judge which engineering machinery is included in the area, and the method is more efficient and convenient.
Therefore, according to the method for drawing scattered points, the geographical coordinates of the engineering machinery distributed in different areas are obtained, the geographical coordinates are converted into the plane coordinates of the map suitable for the user to select, the plane coordinates are drawn in the map layers of different layers in sequence, and finally the map layers are overlaid and displayed to distinguish and display the distribution states of different engineering machinery. The method is equivalent to covering a layer of scatter diagram (formed by overlapping multiple layers of layers) on the map to display the distribution state of the engineering machinery, and then the map can be selected according to the needs, and only the plane coordinate obtained by converting the geographic coordinate of the engineering machinery needs to be matched with the map, so that the application range is expanded. Meanwhile, the layers can be gradually drawn according to a certain frequency (such as 3000 scattered points per frame), so that the rendering frequency is ensured, and the phenomenon that the image is blocked due to too much rendering at one time is avoided.
Referring to fig. 2, a functional module diagram of an apparatus 200 for mapping scatter plots according to an embodiment of the present invention is shown, and the apparatus includes a transceiver module 210 and a processing module 220.
The transceiver module 210 is configured to acquire geographic coordinates of a plurality of working machines.
In the embodiment of the present invention, S110 may be performed by the transceiver module 210.
A processing module 220 for converting the geographic coordinates to planar coordinates corresponding to the selected map, the planar coordinates including a first planar coordinate and a second planar coordinate; the first plane coordinate represents the engineering machinery in a non-working state, and the second plane coordinate represents the engineering machinery in a working state; and respectively drawing the first plane coordinate and the second plane coordinate in different layers in a scatter point mode according to a preset frequency, and superposing and displaying all the layers.
In the embodiment of the present invention, S120 and S130 may be executed by the processing module 220.
Since the method for drawing the scatter dots is already described in detail, it is not described herein again.
In summary, the method and apparatus for drawing scatter plots provided in the embodiments of the present invention include: the method comprises the steps of obtaining geographic coordinates of a plurality of engineering machines, converting the geographic coordinates into plane coordinates corresponding to a map selected by a user, wherein the plane coordinates comprise a first plane coordinate and a second plane coordinate, the first plane coordinate represents the engineering machines in a non-working state, the second plane coordinate guarantees the engineering machines in a working state, finally, the first plane coordinate and the second plane coordinate are sequentially drawn on different layers in a scattered point mode according to a preset frequency, and finally, all the layers are overlaid and displayed. The geographic coordinate of this scheme can be according to the planar coordinate that different maps convert the adaptation, and the range of application is wider, according to predetermined frequency when playing up planar coordinate simultaneously, is unlikely to the volume of playing up too big, leads to the picture card to pause, has guaranteed the effect of playing up.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method can be implemented in other ways. The apparatus embodiments described above are merely illustrative, and for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, the functional modules in the embodiments of the present invention may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, 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 an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A method of mapping scatter, the method comprising:
acquiring geographic coordinates of a plurality of engineering machines;
converting the geographic coordinates to planar coordinates corresponding to a selected map, the planar coordinates including a first planar coordinate and a second planar coordinate; the first plane coordinate represents the engineering machinery in a non-working state, and the second plane coordinate represents the engineering machinery in a working state;
and respectively drawing the first plane coordinate and the second plane coordinate in different layers in a scatter point mode according to a preset frequency, and superposing and displaying all the layers.
2. The method according to claim 1, wherein the step of plotting the first planar coordinate and the second planar coordinate in different layers in a scatter-point manner according to a predetermined frequency and displaying all the layers in an overlapping manner comprises:
drawing the first plane coordinate on a first layer of map layer in a scatter mode;
drawing the second plane coordinate on a second layer of image layer in a scatter mode;
drawing the scattered sample type of the second plane coordinate on a third layer of the layer;
and displaying the first layer image layer, the second layer image layer and the third layer image layer in an overlapping manner.
3. The method of claim 2, wherein the step of spotting the second planar coordinates onto a third layer comprises:
and randomly selecting a plurality of second plane coordinates from the second layer of image layer, and setting the brightness pattern of the second plane coordinates at the same position of the third layer of image layer.
4. The method of claim 1, wherein the method further comprises:
and stopping drawing the first plane coordinate and the second plane coordinate in different layers in a scatter mode in response to the moving operation of the layer by the user, and recovering after the moving operation of the layer by the user is stopped.
5. The method of claim 1, wherein the method further comprises:
and selecting any area in the image layer to determine a plurality of engineering machines in the area.
6. An apparatus for mapping scatter, the apparatus comprising:
the receiving and transmitting module is used for acquiring geographic coordinates of a plurality of engineering machines;
a processing module for converting the geographic coordinates to planar coordinates corresponding to a selected map, the planar coordinates including a first planar coordinate and a second planar coordinate; the first plane coordinate represents the engineering machinery in a non-working state, and the second plane coordinate represents the engineering machinery in a working state; and
and respectively drawing the first plane coordinate and the second plane coordinate on different layers in a scatter point mode according to a preset frequency, and superposing and displaying all the layers.
7. The apparatus of claim 6, wherein the processing module is specifically configured to:
drawing the first plane coordinate on a first layer of map layer in a scatter mode;
drawing the second plane coordinate on a second layer of image layer in a scatter mode;
drawing the scattered sample type of the second plane coordinate on a third layer of the layer;
and displaying the first layer image layer, the second layer image layer and the third layer image layer in an overlapping manner.
8. The apparatus of claim 7, wherein the processing module is specifically configured to:
and randomly selecting a plurality of second plane coordinates from the second layer of image layer, and setting the brightness pattern of the second plane coordinates at the same position of the third layer of image layer.
9. The apparatus of claim 6, wherein the processing module is further to:
and stopping drawing the first plane coordinate and the second plane coordinate in the layer in a scatter mode in response to the moving operation of the layer by the user, and recovering after the moving operation of the layer by the user is stopped.
10. The apparatus of claim 6, wherein the processing module is further to:
and selecting any area in the image layer to determine a plurality of engineering machines in the area.
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