阅读说明：本技术 在Web地图上叠加浏览DWG文件的方法及相关装置 (Method and related device for overlaying and browsing DWG (discrete wavelet packet) file on Web map ) 是由 杨龙 罗亚 齐小玲 张永朋 马颖涛 肖健 毛玲芬 韩晓峰 于 2021-09-26 设计创作，主要内容包括：本发明公开了一种在Web地图上叠加浏览DWG文件的方法及相关装置,应用于服务端,包括：接收DWG文件,其中,DWG文件用于在Web地图端进行展示；基于Teigha File Converter接口将DWG文件转换为dxf文件；基于GDAL开发库将dxf文件解析为GeoJSON文件；将GeoJSON文件发送给Web地图端,以令Web地图端基于所述GeoJSON文件对DWG文件进行渲染展示。上述过程,采用开源方案对DWG文件进行解析处理最终输出成为GEOJSON格式文件,GEOJSON格式可以实现跨GIS平台叠加浏览,实现了对DWG原始数据的处理,GEOJSON格式数据量小,可以提高叠加效率。(The invention discloses a method for overlaying and browsing DWG files on a Web map and a related device, which are applied to a server and comprise the following steps: receiving a DWG file, wherein the DWG file is used for displaying at a Web map end; converting the DWG File into a dxf File based on a Teigha File Converter interface; analyzing the dxf file into a GeoJSON file based on the GDAL development library; and sending the GeoJSON file to a Web map terminal so that the Web map terminal can render and display the DWG file based on the GeoJSON file. In the process, the DWG file is analyzed and processed by adopting an open source scheme and finally output to be the GEOJSON format file, the GEOJSON format can realize cross-GIS platform superposition browsing, the DWG original data is processed, the data volume of the GEOJSON format is small, and the superposition efficiency can be improved.)

1. A method for overlaying and browsing DWG files on a Web map is characterized by being applied to a server side and comprising the following steps:

receiving a DWG file, wherein the DWG file is used for displaying at a Web map end;

converting the DWG File into a dxf File based on a Teigha File Converter interface;

analyzing the dxf file into a GeoJSON file based on a GDAL development library;

and sending the GeoJSON file to the Web map end so that the Web map end displays the DWG file on the basis of the GeoJSON file.

2. The method of claim 1, wherein the server side comprises; a Teigha for Java development library, the Teigha for Java development library comprising: system, loadlibrary ("TeighaJavaCore") and system, loadlibrary ("TeighaJavaDwg"), converting the DWG File to a dxf File based on the Teigha File Converter interface, including:

reading the DWG file based on a readFile method;

after reading is completed, analyzing the DWG file based on a safeOpenObject method, the System.

And calling a writeFile method to output the analyzed DWG file as the dxf file.

3. The method of claim 1, wherein parsing the dxf file into a GeoJSON file based on a GDAL development library comprises:

calling an ogr.open method in the GDAl, and reading a data source in the dxf file based on the ogr.open method;

acquiring a GeoJSON driver instance and a copyDataSource method in the instance;

and converting the data source into a GeoJSON file based on the copyDataSource method.

4. A method for overlaying and browsing DWG files on a Web map is characterized by being applied to a Web map end and comprising the following steps:

acquiring a GeoJSON file;

reading space coordinate information in the GeoJSON file;

converting the space coordinate information into a target picture;

and displaying the target picture at the Web map end.

5. The method of claim 4, wherein converting the spatial coordinate information into a target picture comprises:

converting the spatial coordinate information into a geometric shape based on a preset SDK;

converting the geometric shape into a picture;

and rendering the picture to obtain a target picture.

6. An apparatus for overlaying and browsing DWG files on a Web map, which is applied to a server side, comprises:

the receiving module is used for receiving the DWG file, wherein the DWG file is used for displaying at a Web map end;

the first conversion module is used for converting the DWG File into a dxf File based on a Teigha File Converter interface;

the analysis module is used for analyzing the dxf file into a GeoJSON file based on a GDAL development library;

and the sending module is used for sending the GeoJSON file to the Web map end so as to enable the Web map end to display the DWG file on the basis of the GeoJSON file.

7. The apparatus of claim 6, wherein the parsing module comprises:

the calling and reading unit is used for calling the ogr.open method in the GDAl and reading the data source in the dxf file based on the ogr.open method;

the device comprises an acquisition unit, a storage unit and a processing unit, wherein the acquisition unit is used for acquiring a GeoJSON driver instance and a copyDataSource method in the instance;

and the conversion unit is used for converting the data source into the GeoJSON file based on the copyDataSource method.

8. An apparatus for overlaying and browsing DWG files on a Web map, which is applied to a Web map side, comprises:

the acquisition module is used for acquiring a GeoJSON file;

the reading module is used for reading the space coordinate information in the GeoJSON file;

the second conversion module is used for converting the space coordinate information into a target picture;

and the display module is used for displaying the target picture at the Web map end.

9. A storage medium characterized by comprising a stored program, wherein the program executes the method of overlaying a browsing DWG file on a Web map according to any of claims 1 to 3.

10. A processor, configured to execute a program, wherein the program executes the method for overlaying and browsing DWG files on a Web map according to any of claims 1 to 3.

Technical Field

The invention relates to the technical field of data processing, in particular to a method and a device for overlaying and browsing DWG files on a Web map.

Background

Overlaying and browsing DWG files on a Web map is a common need in the field of WebGIS. At present, mainstream GIS platform manufacturers have corresponding SDKs for analyzing DWG files and finally perform superposition browsing on a map aiming at own platforms. The specific treatment process is as follows: and analyzing and processing the CAD file by adopting a specific SDK provided by mainstream GIS platform manufacturers such as ArcGIS or Supermap, converting the analyzed file into GIS data, and then issuing the GIS data into a map service conforming to the platform format for superposition browsing.

The process cannot realize cross-GIS platform superposition browsing, a lot of redundant data can be attached, the superposition efficiency is not high, and the fundamental reason for the problem is that the method must be realized by adopting an SDK of a specific GIS manufacturer, the autonomous control processing capability is deficient, and the CAD original data cannot be processed.

Disclosure of Invention

In view of the above, the present invention provides a method and an apparatus for browsing DWG files on a Web map in an overlay manner, so as to solve the problems that in the prior art, overlay browsing across a GIS platform cannot be realized, a lot of redundant data are attached, overlay efficiency is not high, and the root cause of the above problems is that the method must be realized by using an SDK of a specific GIS manufacturer, autonomous control processing capability is deficient, and CAD original data cannot be processed. The specific scheme is as follows:

a method for overlaying and browsing DWG files on a Web map is applied to a server and comprises the following steps:

receiving a DWG file, wherein the DWG file is used for displaying at a Web map end;

converting the DWG File into a dxf File based on a Teigha File Converter interface;

analyzing the dxf file into a GeoJSON file based on a GDAL development library;

and sending the GeoJSON file to the Web map end so that the Web map end displays the DWG file on the basis of the GeoJSON file.

In the foregoing method, optionally, the server includes; a Teigha for Java development library, the Teigha for Java development library comprising: system, loadlibrary ("TeighaJavaCore") and system, loadlibrary ("TeighaJavaDwg"), converting the DWG File to a dxf File based on the Teigha File Converter interface, including:

reading the DWG file based on a readFile method;

after reading is completed, analyzing the DWG file based on a safeOpenObject method, the System.

And calling a writeFile method to output the analyzed DWG file as the dxf file.

Optionally, the foregoing method, analyzing the dxf file into a GeoJSON file based on a GDAL development library, includes:

calling an ogr.open method in the GDAl, and reading a data source in the dxf file based on the ogr.open method;

acquiring a GeoJSON driver instance and a copyDataSource method in the instance;

and converting the data source into a GeoJSON file based on the copyDataSource method.

A method for overlaying and browsing DWG files on a Web map is applied to a Web map end and comprises the following steps:

acquiring a GeoJSON file;

reading space coordinate information in the GeoJSON file;

converting the space coordinate information into a target picture;

and displaying the target picture at the Web map end.

Optionally, the method for converting the spatial coordinate information into the target picture includes:

converting the spatial coordinate information into a geometric shape based on a preset SDK;

converting the geometric shape into a picture;

and rendering the picture to obtain a target picture.

An apparatus for overlaying and browsing DWG files on a Web map, which is applied to a server side, comprises:

the receiving module is used for receiving the DWG file, wherein the DWG file is used for displaying at a Web map end;

the first conversion module is used for converting the DWG File into a dxf File based on a Teigha File Converter interface;

the analysis module is used for analyzing the dxf file into a GeoJSON file based on a GDAL development library;

and the sending module is used for sending the GeoJSON file to the Web map end so as to enable the Web map end to display the DWG file on the basis of the GeoJSON file.

The above apparatus, optionally, the parsing module includes:

the calling and reading unit is used for calling the ogr.open method in the GDAl and reading the data source in the dxf file based on the ogr.open method;

the device comprises an acquisition unit, a storage unit and a processing unit, wherein the acquisition unit is used for acquiring a GeoJSON driver instance and a copyDataSource method in the instance;

and the conversion unit is used for converting the data source into the GeoJSON file based on the copyDataSource method.

An apparatus for overlaying and browsing DWG files on a Web map, which is applied to a Web map side, comprises:

the acquisition module is used for acquiring a GeoJSON file;

the reading module is used for reading the space coordinate information in the GeoJSON file;

the second conversion module is used for converting the space coordinate information into a target picture;

and the display module is used for displaying the target picture at the Web map end.

A storage medium comprising a stored program, wherein the program executes the above-described method of browsing a DWG file superimposed on a Web map.

A processor configured to execute a program, wherein the program is configured to execute the above method for browsing DWG files overlaid on a Web map.

Compared with the prior art, the invention has the following advantages:

the invention discloses a method for overlaying and browsing DWG files on a Web map and a related device, which are applied to a server and comprise the following steps: receiving a DWG file, wherein the DWG file is used for displaying at a Web map end; converting the DWG File into a dxf File based on a Teigha File Converter interface; analyzing the dxf file into a GeoJSON file based on a GDAL development library; and sending the GeoJSON file to the Web map end so that the Web map end can render and display the DWG file on the basis of the GeoJSON file. In the process, the DWG file is analyzed and processed by adopting an open source scheme and finally output to be the GEOJSON format file, the GEOJSON format can realize cross-GIS platform superposition browsing, the DWG original data is processed, the data volume of the GEOJSON format is small, and the superposition efficiency can be improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a flowchart of a method for overlaying and browsing a DWG file on a Web map according to an embodiment of the present application;

fig. 2 is a block diagram of a structure of an apparatus for overlaying and browsing a DWG file on a Web map according to an embodiment of the present application;

fig. 3 is another flowchart of a method for overlaying and browsing a DWG file on a Web map according to an embodiment of the present application;

fig. 4 is a block diagram of another structure of an apparatus for overlaying and browsing a DWG file on a Web map according to 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 only a part of the embodiments of the present invention, and not all of the embodiments. 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 previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

The invention discloses a method and a related device for overlaying and browsing a DWG file on a Web map, which are applied to displaying the DWG file on the Web map, wherein the DWG file is a CAD file. At present, mainstream GIS platform manufacturers have corresponding SDKs for analyzing DWG files and finally perform superposition browsing on a map aiming at own platforms. However, these technical routes have a drawback that they are limited to specific GIS service vendors, which greatly limits the versatility and flexibility of the technical solution. Therefore, the present invention provides a method for browsing DWG files on a Web map in an overlapping manner, which is applied to a server, and the execution flow of the method is shown in fig. 1, and includes the following steps:

s101, receiving a DWG file, wherein the DWG file is used for displaying at a Web map end;

in the embodiment of the invention, the front end uploads the DWG file to the server through the file uploading system, and the server receives the DWG file, wherein the DWG file is used for displaying at a Web map end, preferably, the DWG file is stored in the server under a path of a server program, and the server program is used for converting the DWG file into a GeoJSON file.

S102, converting the DWG File into a dxf File based on a Teigha File Converter interface;

in the embodiment of the present invention, a Teigha for Java development library is introduced to the server, where the Teigha for Java development library includes: system, loadlibrary ("TeighaJavaCore") and system, loadlibrary ("TeighaJavaDwg"), the process of converting the DWG File to a dxf File based on the Teigha File Converter interface is as follows: reading the DWG file based on a readFile method in the Teigha for Java development library, and calling a safeOpenObject method provided by the Teigha for Java development library to analyze the file after the reading is finished. And calling a writeFile method provided by the Teigha for Java development library to perform file conversion and storage after the analysis is finished, and indicating that the format of an output file is dxf when the writeFile is called to obtain the dxf file.

S103, analyzing the dxf file into a GeoJSON file based on a GDAL development library;

in the embodiment of the invention, a GDAL development library is introduced into the server. Calling an ogr.open method, and reading the dxf file based on the ogr.open to obtain a file data source ds; calling the ogr.GetDriveByName (GeoJSON) to obtain a GeoJSON driver instance dv; and calling a CopyDataSource method of the driver instance dv, and generating a final GeoJSON file from the dxf file data source ds based on the CopyDataSource method.

And S104, sending the GeoJSON file to the Web map end so that the Web map end displays the DWG file on the basis of the GeoJSON file.

In the embodiment of the invention, under the condition that an acquisition request of the Web map end to the GeoJSON file is received, the GeoJSON file is sent to the Web map end, so that the Web map end displays the DWG file on the basis of the GeoJSON file.

The invention discloses a method for overlaying and browsing DWG files on a Web map, which is applied to a server and comprises the following steps: receiving a DWG file, wherein the DWG file is used for displaying at a Web map end; converting the DWG File into a dxf File based on a Teigha File Converter interface; analyzing the dxf file into a GeoJSON file based on the GDAL development library; and sending the GeoJSON file to a Web map terminal so that the Web map terminal can render and display the DWG file based on the GeoJSON file. In the process, the DWG file is analyzed and processed by adopting an open source scheme and finally output to be the GEOJSON format file, the GEOJSON format can realize cross-GIS platform superposition browsing, the DWG original data is processed, the data volume of the GEOJSON format is small, and the superposition efficiency can be improved.

The invention provides a method for overlaying and browsing DWG files on a Web map, which is applied to a Web map end, wherein the execution flow of the method is shown in figure 2, and the method comprises the following steps:

s201, acquiring a GeoJSON file;

in the embodiment of the invention, the Web map terminal sends a GeoJSON file acquisition request to the server terminal, and the GeoJSON file is acquired under the condition that the server terminal agrees with the acquisition request.

S202, reading space coordinate information in the GeoJSON file;

in the embodiment of the invention, the GeoJSON file is traversed, and the space coordinate information in the GeoJSON file in the preset field is read.

S203, converting the space coordinate information into a target picture;

in the embodiment of the invention, the map development SDK is utilized to generate a specific geometric shape geometry from the acquired space coordinates, the geometry is finally converted into an svg format picture which can be displayed by a webpage, the picture is finally rendered and displayed, and the related custom style rendering is carried out by means of the custom space rendering capability provided by the map development frame, so that the target picture is obtained.

And S204, displaying the target picture at the Web map end.

In the embodiment of the invention, the target picture is displayed at the Web map end, and because the picture is generated based on the DWG file, the DWG file is overlaid and browsed at the Web map end.

The invention discloses a method for overlaying and browsing DWG files on a Web map, which is applied to a Web map end and comprises the following steps: acquiring a GeoJSON file, reading space coordinate information in the GeoJSON file, converting the space coordinate information into a target picture, and displaying the target picture on the Web map terminal. In the process, the target picture is generated based on the GeoJSON file and displayed on the Web map end, and the GeoJSON file can realize cross-GIS platform overlapped browsing, so that the problem that DWG files overlapped and browsed on the Web map are not controlled by a GIS platform is solved.

In the embodiment of the invention, the DWG file is directly processed and analyzed into the GeoJSON file format, so that the core data of the original DWG file is reserved, the most basic space element information can be extracted, and the GEoJSON format data volume is smaller and the superposition efficiency is high when the SDK provided by a Web map end is combined to perform custom style rendering on the space element information.

Based on the foregoing method for overlaying and browsing a DWG file on a Web map, which is applied to a server, an embodiment of the present invention further provides an apparatus for overlaying and browsing a DWG file on a Web map, which is applied to a server, and a structural block diagram of the apparatus is shown in fig. 3, and includes:

a receiving module 301, a first converting module 302, a parsing module 303 and a sending module 404.

Wherein the content of the first and second substances,

the receiving module 301 is configured to receive a DWG file, where the DWG file is used for displaying at a Web map end;

the first conversion module 302 is configured to convert the DWG File into a dxf File based on a Teigha File Converter interface;

the parsing module 303 is configured to parse the dxf file into a GeoJSON file based on a GDAL development library;

the sending module 304 is configured to send the GeoJSON file to the Web map end, so that the Web map end displays the DWG file based on the GeoJSON file.

The invention discloses a device for overlaying and browsing DWG files on a Web map, which is applied to a server and comprises: receiving a DWG file, wherein the DWG file is used for displaying at a Web map end; converting the DWG File into a dxf File based on a Teigha File Converter interface; analyzing the dxf file into a GeoJSON file based on the GDAL development library; and sending the GeoJSON file to a Web map terminal so that the Web map terminal can render and display the DWG file based on the GeoJSON file. In the process, the DWG file is analyzed and processed by adopting an open source scheme and finally output to be the GEOJSON format file, the GEOJSON format can realize cross-GIS platform superposition browsing, the DWG original data is processed, the data volume of the GEOJSON format is small, and the superposition efficiency can be improved.

In this embodiment of the present invention, the parsing module 303 includes:

a calling and reading unit 305, an acquisition unit 306 and a conversion unit 307.

Wherein the content of the first and second substances,

the calling and reading unit 305 is configured to call an ogr.open method in the GDAl, and read a data source in the dxf file based on the ogr.open method;

the obtaining unit 306 is configured to obtain a GeoJSON driver instance and a CopyDataSource method in the instance;

the conversion unit 307 is configured to convert the data source into a GeoJSON file based on the CopyDataSource method.

Based on the above method for overlaying and browsing a DWG file on a Web map, which is applied to a Web map side, an embodiment of the present invention further provides an apparatus for overlaying and browsing a DWG file on a Web map, which is applied to a Web map side, and a structural block diagram of the apparatus is shown in fig. 4, and includes:

an acquisition module 401, a reading module 402, a second conversion module 403 and a presentation module 404.

Wherein the content of the first and second substances,

the obtaining module 401 is configured to obtain a GeoJSON file;

the reading module 402 is configured to read space coordinate information in the GeoJSON file;

the second conversion module 403 is configured to convert the spatial coordinate information into a target picture;

the display module 404 is configured to display the target picture at the Web map end.

The invention discloses a device for overlaying and browsing DWG files on a Web map, which is applied to a Web map end and comprises: acquiring a GeoJSON file, reading space coordinate information in the GeoJSON file, converting the space coordinate information into a target picture, and displaying the target picture on the Web map terminal. In the process, the target picture is generated based on the GeoJSON file and displayed on the Web map end, and the GeoJSON file can realize cross-GIS platform overlapped browsing, so that the problem that DWG files overlapped and browsed on the Web map are not controlled by a GIS platform is solved.

The device comprises a processor and a memory, wherein the receiving module, the first conversion module and the like are stored in the memory as program units, and the processor executes the program units stored in the memory to realize corresponding functions.

The processor comprises a kernel, and the kernel calls the corresponding program unit from the memory. The kernel can be set to be one or more than one, and DWG files can be overlaid and browsed across GIS platforms and the overlaying efficiency can be improved by adjusting kernel parameters.

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), and the memory includes at least one memory chip.

An embodiment of the present invention provides a storage medium on which a program is stored, the program implementing the method for overlaying and browsing a DWG file on a Web map when executed by a processor.

The embodiment of the invention provides a processor, which is used for running a program, wherein the method for overlaying and browsing DWG files on a Web map is executed when the program runs.

The embodiment of the invention provides equipment, which comprises a processor, a memory and a program which is stored on the memory and can run on the processor, wherein the processor executes the program and realizes the following steps:

receiving a DWG file, wherein the DWG file is used for displaying at a Web map end;

converting the DWG File into a dxf File based on a Teigha File Converter interface;

analyzing the dxf file into a GeoJSON file based on a GDAL development library;

and sending the GeoJSON file to the Web map end so that the Web map end displays the DWG file on the basis of the GeoJSON file.

In the foregoing method, optionally, the server includes; a Teigha for Java development library, the Teigha for Java development library comprising: system, loadlibrary ("TeighaJavaCore") and system, loadlibrary ("TeighaJavaDwg"), converting the DWG File to a dxf File based on the Teigha File Converter interface, including:

reading the DWG file based on a readFile method;

after reading is completed, analyzing the DWG file based on a safeOpenObject method, the System.

And calling a writeFile method to output the analyzed DWG file as the dxf file.

Optionally, the foregoing method, analyzing the dxf file into a GeoJSON file based on a GDAL development library, includes:

calling an ogr.open method in the GDAl, and reading a data source in the dxf file based on the ogr.open method;

acquiring a GeoJSON driver instance and a copyDataSource method in the instance;

and converting the data source into a GeoJSON file based on the copyDataSource method.

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams 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.

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

The memory may include forms of volatile memory in a computer readable medium, Random Access Memory (RAM) and/or non-volatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). The memory is an example of a computer-readable medium.

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 computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.

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 an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

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