CN112231609A - Method, device and storage medium for rapidly rendering map based on WebGIS map - Google Patents
Method, device and storage medium for rapidly rendering map based on WebGIS map Download PDFInfo
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Abstract
The application discloses and provides a method, a device and a storage medium for rapidly rendering a map based on a WebGIS map, wherein the method comprises the following steps: responding to user login in a browser interface; judging whether a local GeoJson data corresponding to the user exists in a local database, directly acquiring the local GeoJson data when the local GeoJson data exists, and generating the local GeoJson data when the local GeoJson data does not exist; obtaining the local GeoJson data as rendering data, and rendering a map according to the rendering data; displaying the rendered map in the browser page. According to the method and the device, when GeoJson data required by the map rendering exist, the data are directly used for rendering, the time required by the map rendering is greatly shortened, the data are quickly presented to a user, and the user experience is improved.
Description
Technical Field
The invention relates to the technical field of geographic information, in particular to a method and a device for quickly rendering a map based on a WebGIS map and a storage medium.
Background
WebGIS is a technology for expanding and perfecting geographic information system by using Web technology. It is a network-based client/server system; information exchange between the client and the server is performed by using the internet; it is a distributed system where users and servers can be distributed in different locations and on different computer platforms. WebGIS is mainly used for issuing spatial data, inquiring and retrieving space, serving space models, organizing Web resources and the like.
When static KML document data is loaded by using the WebGIS map, the data rendering map needs to be acquired again each time, the process is slow, the consumed time is long, and the user experience is poor.
Disclosure of Invention
The embodiment of the invention provides a method for quickly rendering a map based on a WebGIS map and a related product, which can quickly finish map rendering by shortening the time required by loading static KML document data on the WebGIS map and improve the experience and the sensibility of a user.
In a first aspect, an embodiment of the present invention provides a method for quickly rendering a map based on a WebGIS map, where the method includes the following steps:
responding to user login in a browser interface;
judging whether a local GeoJson data corresponding to the user exists in a local database, directly acquiring the local GeoJson data when the local GeoJson data exists, and generating the local GeoJson data when the local GeoJson data does not exist;
obtaining the local GeoJson data as rendering data, and rendering a map according to the rendering data; displaying the rendered map in the browser page.
In a second aspect, an electronic device is provided, the electronic device comprising:
the login unit is used for responding to user login in the browser interface;
the acquisition unit is used for judging whether a local database has local GeoJson data corresponding to the user or not, directly acquiring the local GeoJson data when the local GeoJson data exists, and generating the local GeoJson data when the local GeoJson data does not exist;
the processing unit is used for acquiring the local GeoJson data as rendering data and rendering a map according to the rendering data; displaying the rendered map in the browser page.
In a third aspect, an embodiment of the present application provides an electronic device, including a processor, a memory, a communication interface, and one or more programs, where the one or more programs are stored in the memory and configured to be executed by the processor, and the program includes instructions for performing some or all of the steps described in the first aspect of the embodiment of the present application.
In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, where the computer-readable storage medium stores a computer program for electronic data exchange, where the computer program enables a computer to perform some or all of the steps described in the first aspect of the embodiment of the present application.
In a fifth aspect, embodiments of the present application provide a computer program product, where the computer program product includes a non-transitory computer-readable storage medium storing a computer program, where the computer program is operable to cause a computer to perform some or all of the steps as described in the first aspect of the embodiments of the present application. The computer program product may be a software installation package.
The embodiment of the invention has the following beneficial effects:
the rapid map rendering method based on the WebGIS map comprises the steps that before the map is rendered, whether local GeoJson data corresponding to a current user exist in a local database is judged, and when the GeoJson data needed by the map rendering exist, the data are directly used for rendering, so that the time needed by the map rendering is greatly shortened, the map is rapidly presented to the user, and the user experience is improved; when the local database does not have the GeoJson data, the GeoJson data are generated and stored, so that the user can conveniently log in the local database to be directly used, and the GeoJson data are prevented from being generated every time, and a large amount of time is consumed.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic flowchart of a method for quickly rendering a map based on a WebGIS map according to an embodiment of the present application.
Fig. 2 is a functional block diagram of a WebGIS-based map fast rendering device 200 according to an embodiment of the present application.
Fig. 3 is a schematic structural diagram of an electronic device provided in an embodiment of the present application.
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 some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "first," "second," "third," and "fourth," etc. in the description and claims of the invention and in the accompanying drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, result, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
The electronic device related to the embodiment of the present application may be an electronic device with a communication capability, or an electronic device without a communication capability, and the electronic device may include various handheld devices with a wireless communication function, a vehicle-mounted device, a wearable device (smart glasses, smart bracelet, smart watch, and the like), a computing device or other processing devices connected to a wireless modem, and various forms of User Equipment (UE), a Mobile Station (MS), a terminal device (terminal device), and the like.
Since the embodiment of the present application relates to a method for quickly rendering a map based on a WebGIS map, for convenience of understanding, the following description is first provided for relevant terms related to the embodiment of the present application.
1、WebGIS
WebGIS refers to publishing and applying geographic spatial data through the Internet to realize sharing and interoperation of the spatial data, such as online query and business processing of GIS information. The WebGIS client uses a Web browser, such as IE, FireFox. WebGIS is a new technology for expanding and perfecting GIS by using Internet technology, and the core of WebGIS is embedding HTTP standard application system in GIS to realize spatial information management and release under Internet environment. WEBGIS can adopt a plurality of hosts and a plurality of databases to carry out distributed deployment, interconnection is realized through Internet/Intranet, and the WEBGIS is a browser/server (B/S) structure.
WebGIS is a product of the Internet technology applied to GIS development. GIS is expanded through Web function, really becomes a tool that masses used. From any node of Web, Internet user can browse spatial data in WebGIS site, make thematic map, and perform various spatial retrieval and spatial analysis, so that GIS can enter thousands of households.
2. KML (Keyhole Markup Language based on extensible Markup Language) document
KML is a Markup Language (Keyhole Markup Language) of grammatical standards that employs Markup structures, containing nested elements and attributes, to express geotags. The file written according to the KML language is a KML file, and the format also adopts an XML file format, and is applied to related software such as Google Earth, Google Map and the like, and used for representing geographic data (including points, lines, faces, polygons, polyhedrons, models and the like).
KML was declared as an Open geographic information code by OGC (Open geographic information system association, Inc) at 14/4/2008.
3、GeoJson
GeoJson is geographic data expressed and stored in Json' syntax that divides all elements into points, line segments, polygons, and geometric collections that can be used directly as web pages. The GeoJson object may represent a geometry, a feature or a set of features, etc.
Referring to fig. 1, fig. 1 provides a method for rapidly rendering a map based on a WebGIS map, including the following steps:
Specifically, when a user enters a page by using a browser, the electronic device responds to the login of the user to acquire the login information of the current user.
The browser is used as a client interface, receives user login and provides information and services for the user, and the final effect, information and the like are displayed to the user through the browser interface.
And 102, judging whether the local database has local GeoJson data corresponding to the login user, and acquiring the local GeoJson data.
Specifically, whether local GeoJson data corresponding to the user exist in a local database or not is judged, and when the local database has the local GeoJson data, the local GeoJson data are directly acquired; when the local database does not have the local GeoJson data, generating the local GeoJson data.
The method for judging whether the local GeoJson data corresponding to the user exists in the local database comprises the following main steps:
s11, inquiring a local IndexDB database of the browser to acquire an access record of the user;
s12, judging whether the user is a new user;
s13, when the user is a new user, determining that the local GeoJson data does not exist in the local database.
S14, when the user is not a new user, determining that the local GeoJson data exists in the local database.
Through the set judgment process, when a user logs in through a browser, the electronic equipment firstly executes a judgment process, firstly queries a local IndexDB database of the browser to see whether corresponding GeoJSON data is stored or not, and if the corresponding GeoJSON data exists, the data can be directly used for map rendering, so that the waiting time of the user is greatly reduced; and the situation that the GeoJSON data needs to be generated every time of login response, and unnecessary storage space is wasted can be avoided.
The method for generating the local GeoJson data comprises the following main steps of:
s21, collecting and acquiring the requested KML document from the back-end server;
and S22, converting the KML document data into GeoJSON data which can be used for WebGIS map rendering at the front end.
After the step of generating the local GeoJson data is completed, the method further includes: and storing the generated GeoJSON data in an IndexedDB database local to the browser, and directly skipping the step of generating the local GeoJson data when the user accesses the application through the browser again after the step, and directly acquiring the GeoJSON data from the IndexedDB database local to the browser.
In one possible embodiment, for the GeoJSON data with the size of about 5MB, the time taken for map rendering by directly acquiring the GeoJSON data is about 10 seconds, and the time taken for map rendering after generating the GeoJSON data is about 1 second each time. And, the larger the difference in the spent time in the two cases of having GeoJSON data with the larger data amount. The specific time difference situation is also related to the network condition, the browser configuration and the like.
And 103, rendering a map according to the GeoJson data, and displaying the result in a browser page.
Specifically, the local GeoJson data is obtained as rendering data, and a map is rendered according to the rendering data; displaying the rendered map in the browser page.
Referring to fig. 2, fig. 2 is a functional block diagram of a WebGIS-based map fast rendering apparatus 200 according to an embodiment of the present application, where the apparatus 200 includes: a logging unit 201, an obtaining unit 202, a processing unit 203, wherein,
the login unit 201 is configured to respond to a user login in a browser interface;
the determining unit 202 is configured to determine whether a local database has local GeoJson data corresponding to the user, directly acquire the local GeoJson data when the local database has the local GeoJson data, and generate the local GeoJson data when the local database does not have the local GeoJson data;
the processing unit 203 is configured to acquire the local GeoJson data as rendering data, and render a map according to the rendering data; displaying the rendered map in the browser page.
The device for rapidly rendering the map based on the WebGIS map, which is described in the embodiment of the application, judges whether the local database has local GeoJson data corresponding to a current user or not before rendering the map, and directly uses the data for rendering when the GeoJson data required by rendering the map exists, so that the time required by rendering the map is greatly shortened, the map is rapidly presented to the user, and the user experience is improved; when the local database does not have the GeoJson data, the GeoJson data are generated and stored, so that the user can conveniently log in the local database to be directly used, and the GeoJson data are prevented from being generated every time, and a large amount of time is consumed.
Optionally, in the aspect of determining whether the local database has the local GeoJson data corresponding to the user, the obtaining unit 202 is specifically configured to:
inquiring a local IndexDB database of the browser to acquire an access record of the user;
judging whether the user is a new user or not according to the access record;
when the user is a new user, the local database does not have the local GeoJson data;
when the user is not a new user, the local database has the local GeoJson data.
Optionally, in the aspect of determining whether the user is a new user according to the access record, the obtaining unit 202 is further configured to:
when the access record is 0, determining that the user is a new user;
when the access record is not 0, determining that the user is not a new user.
Optionally, in the aspect of generating the local GeoJson data when the local GeoJson data is included, the processing unit 203 is specifically configured to:
KML document data is acquired from a back-end server, the KML document data is converted into GeoJson data, and the converted GeoJson data is used as the rendering data.
Optionally, in the aspect of generating the local GeoJson data when the local GeoJson data is not included, the processing unit is further specifically configured to:
and storing the generated local GeoJson data in an IndexDB database local to the browser, and binding the local GeoJson data with the current user.
Referring to fig. 3, fig. 3 is a schematic structural diagram of an electronic device provided in an embodiment of the present application, as shown, the electronic device includes a processor, a memory, a communication interface, and one or more programs, the one or more programs are stored in the memory and configured to be executed by the processor, and in an embodiment of the present application, the programs include instructions for performing the following steps:
responding to user login in a browser interface;
judging whether a local GeoJson data corresponding to the user exists in a local database, directly acquiring the local GeoJson data when the local GeoJson data exists, and generating the local GeoJson data when the local GeoJson data does not exist;
obtaining the local GeoJson data as rendering data, and rendering a map according to the rendering data; displaying the rendered map in the browser page.
The electronic equipment described in the embodiment of the application can be seen that before the map is rendered, whether the local database has local GeoJson data corresponding to the current user is judged, and when the local database has the GeoJson data required by the map rendering, the data is directly used for rendering, so that the time required by the map rendering is greatly shortened, the data is quickly presented to the user, and the user experience is improved; when the local database does not have the GeoJson data, the GeoJson data are generated and stored, so that the user can conveniently log in the local database to be directly used, and the GeoJson data are prevented from being generated every time, and a large amount of time is consumed.
Optionally, in the aspect of determining whether the local database has local GeoJson data corresponding to the user, the program is configured to execute the following steps:
inquiring a local IndexDB database of the browser to acquire an access record of the user;
judging whether the user is a new user or not according to the access record;
when the user is a new user, the local database does not have the local GeoJson data;
when the user is not a new user, the local database has the local GeoJson data.
Optionally, in the aspect of determining whether the user is a new user according to the access record, the program is configured to execute the following steps:
when the access record is 0, determining that the user is a new user;
when the access record is not 0, determining that the user is not a new user.
Optionally, in the aspect of generating the local GeoJson data when the local GeoJson data is included, the program is configured to execute the following steps:
KML document data is acquired from a back-end server, the KML document data is converted into GeoJson data, and the converted GeoJson data is used as the rendering data.
Optionally, after the local GeoJson data is generated when the local GeoJson data is not available, the program is configured to execute the following steps:
and storing the generated local GeoJson data in an IndexDB database local to the browser, and binding the local GeoJson data with the current user.
The above description has introduced the solution of the embodiment of the present application mainly from the perspective of the method-side implementation process. It is understood that the electronic device comprises corresponding hardware structures and/or software modules for performing the respective functions in order to realize the above-mentioned functions. Those of skill in the art will readily appreciate that the present application is capable of hardware or a combination of hardware and computer software implementing the various illustrative elements and algorithm steps described in connection with the embodiments provided herein. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
Embodiments of the present invention also provide a computer storage medium, wherein the computer storage medium stores a computer program for electronic data exchange, and the computer program enables a computer to execute part or all of the steps of any one of the methods described in the above method embodiments.
Embodiments of the present invention also provide a computer program product comprising a non-transitory computer readable storage medium storing a computer program operable to cause a computer to perform some or all of the steps of any one of the methods as recited in the above method embodiments.
It should be noted that, for simplicity of description, the above-mentioned method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present invention is not limited by the order of acts, as some steps may occur in other orders or concurrently in accordance with the invention. Further, those skilled in the art should also appreciate that the embodiments described in the specification are exemplary embodiments and that the acts and modules illustrated are not necessarily required to practice the invention.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus may be implemented in other manners. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one type of division of logical functions, and there may be other divisions when actually implementing, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of some interfaces, devices or units, and may be an electric or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit may be implemented in the form of hardware, or may be implemented in the form of a software program module.
The integrated units, if implemented in the form of software program modules and sold or used as stand-alone products, may be stored in a computer readable memory. 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 memory and includes several instructions for causing a computer device (which may be a personal computer, a server, a network device, or the like) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned memory comprises: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by associated hardware instructed by a program, which may be stored in a computer-readable memory, which may include: flash Memory disks, Read-Only memories (ROMs), Random Access Memories (RAMs), magnetic or optical disks, and the like.
The above embodiments of the present invention are described in detail, and the principle and the implementation of the present invention are explained by applying specific embodiments, and the above description of the embodiments is only used to help understanding the method of the present invention and the core idea thereof; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. A method for rapidly rendering a map based on a WebGIS map is applied to electronic equipment, and is characterized by comprising the following steps:
responding to user login in a browser interface;
judging whether a local GeoJson data corresponding to the user exists in a local database, directly acquiring the local GeoJson data when the local GeoJson data exists, and generating the local GeoJson data when the local GeoJson data does not exist;
obtaining the local GeoJson data as rendering data, and rendering a map according to the rendering data; displaying the rendered map in the browser page.
2. The method of claim 1, wherein the determining whether the local database has local GeoJson data corresponding to the user comprises:
inquiring a local IndexDB database of the browser to acquire an access record of the user;
judging whether the user is a new user or not according to the access record;
when the user is a new user, the local database does not have the local GeoJson data;
when the user is not a new user, the local database has the local GeoJson data.
3. The method of claim 2, wherein determining whether the user is a new user according to the access record comprises:
when the access record is 0, determining that the user is a new user;
when the access record is not 0, determining that the user is not a new user.
4. The method of claim 2, wherein generating the local GeoJson data without the local GeoJson data comprises:
KML document data is acquired from a back-end server, the KML document data is converted into the local GeoJson data, and the converted local GeoJson data is used as the rendering data.
5. The method of claim 2, wherein after generating the local GeoJson data without the local GeoJson data, further comprising:
and storing the generated local GeoJson data in an IndexDB database local to the browser, and binding the local GeoJson data with the current user.
6. An electronic device, characterized in that the electronic device comprises:
the login unit is used for responding to user login in the browser interface;
the acquisition unit is used for judging whether a local database has local GeoJson data corresponding to the user or not, directly acquiring the local GeoJson data when the local GeoJson data exists, and generating the local GeoJson data when the local GeoJson data does not exist;
the processing unit is used for acquiring the local GeoJson data as rendering data and rendering a map according to the rendering data; displaying the rendered map in the browser page.
7. The electronic device of claim 6, comprising:
the obtaining unit is used for querying a local IndexDB database of the browser and obtaining the access record of the user;
judging whether the user is a new user or not according to the access record;
when the user is a new user, the local database does not have the local GeoJson data;
when the user is not a new user, the local database has the local GeoJson data.
8. The electronic device of claim 6, comprising:
the acquiring unit is further configured to acquire KML document data from a back-end server, convert the KML document data into GeoJson data, and use the converted GeoJson data as the rendering data.
9. The electronic device of claim 6, comprising:
the processing unit is further configured to store the generated local GeoJson data in an IndexeDB database local to the browser, and bind the local GeoJson data with the current user.
10. A computer-readable storage medium, characterized in that a computer program is stored, wherein the computer program causes a computer to execute a method of rapidly rendering a map based on a WebGIS map according to any one of claims 1 to 7.
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| CN113792241A (en) * | 2021-09-26 | 2021-12-14 | 上海数慧系统技术有限公司 | Method and related device for overlaying and browsing DWG (discrete wavelet packet) file on Web map |
| CN113821737A (en) * | 2021-09-29 | 2021-12-21 | 中国平安财产保险股份有限公司 | Map rendering method, device and equipment for single-page application and storage medium |
| CN115237862A (en) * | 2022-08-30 | 2022-10-25 | 四川省交通勘察设计研究院有限公司 | KML file-based map visual display method and device |
| CN117392298A (en) * | 2023-10-18 | 2024-01-12 | 亿海蓝（北京）数据技术股份公司 | Image rendering method and system based on WebGIS platform, storage medium and electronic equipment |
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