CN100590624C - Method for exhibiting multidimensional space data based on SOA structure - Google Patents

Abstract

A method for exhibiting multi dimensional space data based on SOA structure comprises the following steps: A, cutting map pictures into picture segments with same width and size, and numbering these pictures; B, when working a procedure, conversing into pictures' number according to visible latitude and longitude range and loading these pictures on a client terminal; C, extracting geo informationdata according to the visible latitude and longitude range, exhibiting these geo information data in pattern form on the client terminal, and marking these geo information data on pictures data; D, after executing an operation for the client, repeatedly executing B-C steps until completing the program. The invention integrates general pictures and geo information data and saves pictures loading time of WebGIS.

Description

Method for exhibiting multidimensional space data based on the SOA framework

Technical field

The present invention relates to a kind of method of the exhibiting multidimensional space data based on the SOA framework, be used to represent different information, be applicable to common WebGIS system, so-called multidimensional space data mainly comprises representing of image data and general geodata etc.

Background technology

Break through the restriction of unit and specialty, make full use of new infotecies such as network, for the public and professional user provide new trend abundanter, that spatial Information Service that more optimize has become the generalized information system development.Almost in developer component formula GIS, based on network WebGIS system (network geographic information system) has appearred, the WebGIS system is under Internet or Intranet network environment, adopt a kind of compatible storage, processing, analysis and the demonstration of WWW agreement and the computer information system of application space information, its basic thought is exactly that geography information is provided on the internet, allows the user obtain data and function service in each WebGIS system by general Web browser.

In traditional internet, applications, people are accustomed to using HTML to come descriptor resource and service, but because HTML is not with good expansibility, can not portray data content exactly, be unfavorable for the automation mechanized operation of large-scale commercial applications activity, also be unfavorable for effectively utilizing the resource in the internet, thereby cause being very restricted based on being applied in when further deeply developing of internet.Therefore, in order to satisfy growing business demand, people propose Web service and solve the problem that next generation internet software is faced.

Definition according to W3C: " Web service is a kind of software application by URI sign, and its interface and binding form can pass through XML standard definition, description and retrieval, and can by XML message and Internet protocol finish with other application directly not alternately ".Can draw from this definition, Web service is not the brand-new technology system, it is to be based upon on original technology, be the traditional extension of component technology under the internet, applications environment, its purpose and effect provide a kind of unified standard and technology, for the Internet software application provides unified functional description and function sharing mechanism.It provides a kind of application level function that carries out between different platform/system automatically to integrate integrated and needed Technical Architecture is handled in robotization, for function is integrated integrated and message exchange is handled to provide and realized the basis.

Traditional WebGIS system client mainly uses programming languages such as JSP, ASP to write, and the user whenever carries out single job, and browser client need refresh full page just can demonstrate operating result, causes the interactivity between WebGIS system and the user very poor.

ASP is the abbreviation of Active Server Page, means " active server webpage ".ASP is a kind of application of the replaced C GI shell script of Microsoft's exploitation, and it can carry out alternately with database and other program, is a kind of programming tool simply and easily.The form of the web page files of ASP is .asp, is usually used in now in the various dynamic websites.ASP is that a kind of server side scripts is write environment, can be used for creating and operation dynamic web page or web application.The ASP webpage can comprise HTML mark, plain text, script command and com component etc.Utilize ASP can in webpage, add interactive content (as online list), also can create and use the weblication of html web page as user interface.

JSP (JavaServer Pages) is a kind of dynamic web page technique standard by Sun Microsystems company advocates, the participation of many companies is set up together.The somewhat similar ASP technology of JSP technology, it is to insert java applet section (Scriptlet) and JSP mark (tag) in traditional webpage html file (* .htm, * .html), thereby forms jsp file (* .jsp).

When now WebGIS system progressively towards the SOA framework, beginning is a large amount of when using the Web service technology, client and user become a big problem alternately.In the past, the WebGIS client mainly used programming languages such as JSP, ASP to write, and the user whenever carries out single job, and browser client need refresh full page just can demonstrate operating result, causes the interactivity between WebGIS system and the user very poor.

Summary of the invention

The purpose of this invention is to provide a kind of time of saving the picture loading, make the method that represents that speed improves greatly based on the exhibiting multidimensional space data of SOA framework, wherein the structure of WebGIS client then adopts the Web service technology to realize the SOA framework mainly based on the AJAX technology in service end.

Term AJAX is writing a Chinese character in simplified form of " Asynchronous JavaScript And XML ", AJAX is not simple a kind of technology, in fact, it is combined in new powerful mode by several flourish technology, before AJAX occurs, Web website force users enters submission, wait, shows example again that user's action is always synchronous with " think time " of server, shown in the first half among Fig. 2-3.AJAX provides the ability with the server asynchronous communication, thereby the user is freed from the circulation of request.By means of AJAX, the user can utilize XMLHttpRequest to send asynchronous request to server, when request is returned, just can use JavaScript and CSS correspondingly to upgrade partial page, rather than refresh full page, shown in Fig. 2-3 the latter half.What is more important, the user even do not know browser with server communication: the Web website looks like summary responses.

Because Web service and AJAX have all adopted the technology that has been widely used, as XML, this combination for both provides possibility.And, AJAX adopts and carries out the transmission of message based on the XMLHttpRequest agreement of HTTP, Web service has then used SOAP as communication protocol, use the XMLHttpRequest object in the AJAX technology to send the request that meets the soap protocol form so need only, just called Web service that can be successful to server end in the Web client.

In traditional WebGIS system, client is not carried out single job, the page all can send request to server end, refresh full page then and just can demonstrate operating result, and, the picture that client will represent is bulky mostly, needs on the client to take a long time if once be loaded into, and also can cause the slack-off even collapse of browser program reaction when serious.

And the customer end adopted AJAX technology of this WebGIS system, making between client and the service end can asynchronous communication, the benefit of the maximum of doing like this is exactly after obtaining request results from service end, as long as refresh respective page, and need not refresh full page, promoted the interactive experience of client greatly, in addition, in order to solve the excessive problem of the volume that Shows Picture, can cut into many little segments to a big pictures by certain rule, again according to the request of client, only with corresponding thumbnail splicing, be carried on the client and get final product.

For achieving the above object, the present invention takes following technical scheme: a kind of method of the exhibiting multidimensional space data based on the SOA framework, and it is characterized in that: it may further comprise the steps:

(1) now map picture is cut into the identical segment of width size, and these pictures are numbered;

(2) when operation, be scaled the picture numbering according to visual longitude and latitude scope, and these pictures are loaded on the client;

(3) according to visual longitude and latitude scope, by AJAX technology and Web service technology geographic information data is taken out, parse the result, according to the longitude and latitude of geography information, represent in client again, and mark on image data with patterned form;

(4) every pair of intact operation of client executing, repeated execution of steps (2)～step (3) is up to end of run.

Described step (2) be scaled the picture numbering according to visual longitude and latitude scope, and the concrete steps that these pictures are loaded on the client is when operation:

(a) calculate current longitude and latitude scope;

(b) the longitude and latitude scope is taken out geographic information data as the request Web service;

(c) geographic information data is resolved, analysis result is represented in client with patterned form.

Described step (3) is according to visual longitude and latitude scope, by AJAX technology and Web service technology geographic information data is taken out, parse the result, again according to the longitude and latitude of geography information, represent in client with patterned form, and the concrete steps that mark on image data are as follows:

(a) calculate current longitude and latitude scope;

(b) the longitude and latitude scope is taken out geographic information data as the request Web service;

(c) geographic information data is resolved, analysis result is represented in client with patterned form.

The present invention's advantage compared with prior art is: the present invention is by carrying out representing of multidimensional space information data with AJAX technology and Web service, comprising map datum and geographic information data, and map datum is carried out segment cut apart and name, make it can calculate the longitude and latitude scope of each segment according to picture name, so just geographic information data and image data are well combined, in addition, according to current longitude and latitude scope, can also calculate needs which segment of dynamic load, saved the time that picture loads, made to represent speed and improve greatly.

Description of drawings

Fig. 1 is the name form of first order picture of the present invention;

Fig. 2 is the name form of the second level of the present invention picture;

Fig. 3 is the name form of third level picture of the present invention;

Fig. 4 is a data exhibiting process flow diagram of the present invention;

Fig. 5 is a geographic information data exhibiting method of the present invention.

Embodiment

As shown in Figure 4, the method for the exhibiting multidimensional space data based on the SOA framework disclosed by the invention, Fig. 1～Fig. 3 has illustrated the naming rule of map picture.

There is the slow problem of picture loading velocity in the WebGIS system, at first the picture of different shooting heights is classified, and the picture with every class cuts into equal-sized segment again, when the client browsing pictures, only loads the segment that is comprised in the visual longitude and latitude scope.Picture format is defined as " xMyNzP ", is called " coordinate numbering " for this method for numbering serial.Wherein M, N, P are natural number, and M, N represent the coordinate position of this picture in all pictures of the whole world, and P represents current shooting height level value.

When the first order, the segment number is 1, segment called after x0y0z1, as shown in Figure 1;

When the second level, the zone of the representative of original first order picture just projects on 4 segments, and each segment name as shown in Figure 2;

When the third level, originally the zone of the representative of each second level segment all projected on 4 segments, segment add up to 16, the name of each segment is as shown in Figure 3.

And the like, the P value whenever adds 1, and originally the zone of the representative of each segment all projected on 4 segments, and the number of segment number is 4p-1 under the P rank.

And,, can calculate the longitude and latitude scope of each segment according to the longitude and latitude scope of whole picture for each grade picture, that is to say that the longitude and latitude scope of each numbering representative is determined.

When the user need browse certain picture region, can go out to load which segment according to the longitude and latitude range computation, remove at the segment that will not need to load.

In Fig. 5, narrated the methods of exhibiting of geographic information data, after geographic information data takes out from database with the form of Web service, can with the form of graphical (for example one or more red point) with these information labelings on picture.

Claims (1)

1, a kind of method of the exhibiting multidimensional space data based on the SOA framework is characterized in that may further comprise the steps:

(1) now map picture is cut into the identical segment of width size, and these pictures are numbered; The name form of described segment is that picture format is defined as " xMyNzP ", be called " coordinate numbering ", wherein M, N, P are natural number, M, N represent the coordinate position of this picture in all pictures of the whole world, P represents current shooting height level value, according to the numbering of every pictures, can calculate the longitude and latitude scope of this picture, geographic information data can be labeled on the picture;

(2) when operation, be scaled the picture numbering according to visual longitude and latitude scope, and these pictures are loaded on the client, the specific implementation step is:

(a) calculate current longitude and latitude scope;

(b) the longitude and latitude scope is taken out geographic information data as the request Web service;

(c) geographic information data is resolved, analysis result is represented in client with patterned form;

(3) according to visual longitude and latitude scope, by AJAX technology and Web service technology geographic information data is taken out, parse the result, again according to the longitude and latitude of geography information, represent in client with patterned form, and mark on image data, the specific implementation step is as follows:

(a) calculate current longitude and latitude scope;

(b) the longitude and latitude scope is taken out geographic information data as the request Web service;

(c) geographic information data is resolved, analysis result is represented in client with patterned form;

(4) every pair of intact operation of client executing, repeated execution of steps (2)～step (3) is up to end of run.

Images