CN109522386A - A kind of spatial Information Service generation method and system across GIS platform - Google Patents
A kind of spatial Information Service generation method and system across GIS platform Download PDFInfo
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- CN109522386A CN109522386A CN201811596150.8A CN201811596150A CN109522386A CN 109522386 A CN109522386 A CN 109522386A CN 201811596150 A CN201811596150 A CN 201811596150A CN 109522386 A CN109522386 A CN 109522386A
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Abstract
The present invention provides a kind of spatial Information Service production method and system across GIS platform, and the system comprises client's expression layer, Web application service layer and data service layers.The described method includes: S1, client issue service access request by Internet；The service access permission of S2, Authority Verification module verification client；S3, Service Instance receive request, start corresponding GIS service process, process manager monitoring process operating status according to request；S4, GIS service process transfer the vector data and attribute data of corresponding GIS platform according to the categorical data that service needs, and carry out data analysis, and export each GIS platform data at unified GIS service by standardization process；S5, service result return to client.Spatial Information Service generation method and system across GIS platform of the invention only requires have the GIS environment on basis independent of the spatial Information Service of other platforms publication, and the service extension of generation is stronger, and spatial information fusion is higher with sharing efficiency.
Description
Technical field
The present invention relates to geographic information services field more particularly to a kind of spatial Information Service generation sides across GIS platform
Method and system.
Background technique
With the development of computer technology, network technology, database technology etc. and deepening constantly for application, people couple and
When obtain, the requirement of search space information it is also growing day by day.However, due to different GIS platform GML data storage formats are different,
The standard disunity of the difference of data model and data structure, geodata, each GIS data management software interoperability is poor, leads
Cause professional interdisciplinary using difficulty, the geographic information data utilization rate of magnanimity is very low.Traditional spatial Information Service system
System be Industry-oriented mostly, depend on specific GIS support platform and running environment, each independence, relative closure, can not
It communicates with each other and cooperates, form very much " spatial information isolated islands ", it is difficult to realize the shared of spatial data and application.How to integrate
These space information resources across GIS platform provide the hot spot that efficient, good spatial Information Service is always studied both at home and abroad
Problem.For the public, the operation for understanding the format and professional software of geodata is not needed many times, and is only needed
It, using geographic information services, objectively needs a kind of to store different GIS platforms by network or other visualization tools
Spatial data integrated, form comprehensive unified, general spatial Information Service method and system.
In the prior art, it proposes and is led to the service of different type, separate sources using service-oriented SOA framework model
It crosses standardization process and carries out integration, registration, description, publication and the tune serviced by unified and general mode
With realizing the fusion of spatial Information Service and shared.But this method sends out service well laid dependent on other platforms, needs to obtain
The support of other platforms SERVER, the scalability of service is poor, own complicated function sex service (such as booster point of certain platforms
Analysis) then it is difficult to integrate.
The present invention aiming at the problems existing in the prior art, provides a kind of spatial Information Service generation side across GIS platform
Method and system, the spatial Information Service that it is issued independent of other platforms only require have the GIS environment on basis, raw
At service scalability it is stronger, spatial information fusion with share efficiency it is higher.
Summary of the invention
In view of this, the present invention provides a kind of spatial Information Service generation method and system across GIS platform, it can be fast
Fast-growing realizes that spatial information is efficiently merged and shared at spatial Information Service across GIS platform, unified, general.
The present invention provides a kind of spatial Information Service generation system across GIS platform, including client's expression layer, Web application
Service layer and data service layer, in which:
Client's expression layer: it for browser clients such as IE/Firefox, is carried out with Web application service layer by http protocol
Communication；
Web application service layer: receiving user access request and carries out Authority Verification, and permission is asked by post-processing user's access
It asks, response results is returned into client's expression layer；
Data service layer: the spatial data that different GIS platforms provide including ARCGIS, MapGIS, SuperMap etc. is
Web application service layer handles user access request and provides data support.
Further, the Web application service layer further include:
Authority Verification module: it for verifying client's expression layer to the access authority of respective service, will be asked if permission passes through
It asks and Service Instance is transferred to receive and handle, return to the prompt information of denied access to client's expression layer if permission does not pass through；
Service Instance: i.e. Map Services, Feature Service, slice service corresponding Service Instance, and the Service Instance is used for
It receives and handles the request from client's expression layer, and response results are returned into client's expression layer；
Include corresponding service processes manager in each example of the Service Instance, is opened for providing the Service Instance
The life cycle management of dynamic corresponding GIS service process: being both provided with the thread for assisting the management process in each process,
The state that service processes manager is communicated by the thread with process come monitoring process, when process break down, process
Thread feeds back Trouble Report from trend process manager, so that process manager can know rapidly the fault condition and take phase
The subsequent operation answered such as restarts the process；When needing to stop process, process manager is sent to the thread of process to be stopped
Message；
GIS service process: the vector number of corresponding GIS platform in the categorical data called data service layer needed according to service
According to and attribute data, carry out data analysis, and by standardization process encapsulate data into unified GIS service；
The GIS service process is a kind of Resident Process, i.e., completes the access to service in client's expression layer and then discharge
After the reference of service, the process for generating the service is placed to running background without being killed, for Service Instance in next time
Continue to call when receiving from the access request of client's expression layer.
The present invention provides a kind of spatial Information Service generation method across GIS platform, comprising the following steps:
S1, user issue service access by Internet in client's expression layer (browser clients such as IE/Firefox)
Request；
Further, the specific steps of the step S1 are as follows:
Client (instruction+parameter) service request unified to Web application service layer data format of transfering with JSON character string,
In include map export, map inquiry, figure layer output, element addition, metadata output etc. instruction, and definition the layers list,
The parameters such as figure layer field, spatial dimension；
S2, the service access permission by Authority Verification module verification from client；
Further, the specific steps of the step S2 are as follows:
Request is transferred to service real by service access permission of the Authority Verification module verification from client if permission if
Example receives and processing, returns to the prompt information of denied access to client if permission does not pass through；
S3, after the service access permission in step S2 from client is verified, Service Instance receive request, according to
Request starts corresponding GIS service process, process manager monitoring process operating status；
GIS service process described in S4, step S3 transfers the vector of corresponding GIS platform according to the categorical data that service needs
Data and attribute data carry out data analysis, and encapsulate data into unified GIS service by standardizing process；
Further, the specific steps of the step S4 are as follows:
The service request of S41, GIS service process unserializing from client, solution translate specific in the request of client
Instruction and parameter；
S42, GIS service process determine the categorical data of service needs according to instruction, transfer GIS platform by relevant interface
Vector data and attribute data, illustrate that client issues if relevant interface is not found be illegal request and it goes without doing goes out to ring
It answers；
S43, GIS service process referring to Map Services under ARCGIS Server relevant criterion by each GIS platform
Geodata is packaged into service, and (data service based on the encapsulation of Map Services method can also meet WMS and WFS standard rule
Model), and select JSON that service is returned to client as unified format；
Response results are returned to client by S5, Service Instance；
Further, the specific steps of the step S5 are as follows:
The service result of response is returned to client by Service Instance, is further included the metadata of output service, that is, is serviced defeated
The description information of the services such as range, figure layer, coordinate system, coordinate unit out.
Technical solution provided by the invention has the benefit that the present invention provides a kind of space letter across GIS platform
Service creation method and system is ceased, data analysis is carried out by the geodata to different GIS platforms, by geodata through standard
Change process and be converted into general information service, then client is distributed to by unified mode, realizes different GIS platform data sets
Synthesis display and visualization.Of the invention spatial Information Service generation method across GIS platform and existing across GIS platform
Geospatial Web service sharing method is different, it is not to be based on respective platform environment in other GIS platforms to issue spatial information
Each service is integrated using Enterprise SOA model on the basis of service, but directly passes through different Service Instances
Process transfers spatial data according to unified input and output standard from each GIS platform and forms unified spatial Information Service, saves
Each GIS platform has been gone to issue this link of geo-spatial service respectively, so that spatial information fusion and shared efficiency are more
It is high.
Detailed description of the invention
Fig. 1 is that a kind of spatial Information Service across GIS platform provided by the invention generates system and its flow diagram；
Fig. 2 is a kind of spatial Information Service generation method block diagram across GIS platform provided by the invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is further described.
A kind of spatial Information Service generation system across GIS platform is present embodiments provided, as shown in Figure 1, including client
Expression layer, Web application service layer and data service layer, in which:
Client's expression layer: it for browser clients such as IE/Firefox, is carried out with Web application service layer by http protocol
Communication；
Web application service layer: including Authority Verification module, Service Instance and GIS service process, wherein Service Instance
Each example in include corresponding service processes manager.As the client's expression layer (IE/ for having service access permission
The browser clients such as Firefox) by http protocol to Web Application Server issue access request when, Web Application Server
Start corresponding Service Instance, is received by Service Instance and handled the request from client's expression layer, realize certain GIS function
Can, and response results are returned into client's expression layer；
Data service layer: the spatial data that different GIS platforms provide including ARCGIS, MapGIS, SuperMap etc. is
Web application service layer handles user access request and provides data support.
A kind of spatial Information Service generation method across GIS platform is present embodiments provided, as shown in Fig. 2, including as follows
Step:
S1, user pass through in client's expression layer (browser clients such as IE/Firefox, hereinafter referred to as client)
Internet issues service access request；
Specifically, client (instruction+parameter) service unified to Web application service layer data format of transfering with JSON character string
Request, wherein comprising instructions such as map export, map inquiry, figure layer output, element addition, metadata outputs, and definition figure
The parameters such as layers list, figure layer field, spatial dimension.
S2, the service access permission by Authority Verification module verification from client；
Specifically, service access permission of the Authority Verification module verification from client hands over request if permission passes through
It is received by Service Instance and is handled, return to the prompt information of denied access to client if permission does not pass through.
S3, after the service access permission in step S2 from client is verified, Service Instance receive request, according to
Request starts corresponding GIS service process, process manager monitoring process operating status.
GIS service process described in S4, step S3 transfers the vector of corresponding GIS platform according to the categorical data that service needs
Data and attribute data carry out data analysis, and encapsulate data into unified GIS service by standardizing process；
Specifically, service request of the GIS service process unserializing from client, solution translate client in step S4
Specifically instruction and parameter, and the categorical data needed according to the determining service of instruction, it is flat to transfer GIS by relevant interface in request
The vector data and attribute data of platform illustrate that client's expression layer issued is illegal request and does not have to if relevant interface is not found
It responds.
GIS service process is according to the relevant criterion of Map Services under ARCGIS Server by the geography of each GIS platform
Data are packaged into service (data service based on the encapsulation of Map Services method also complies with WMS and WFS standard criterion), and select
JSON is selected as unified format, service is returned into client.
It should be noted that using ARCGIS Server relevant criterion the reason of allow for the market ARCGIS and occupy
Rate is big, is more conducive to unified GIS service with reference to its service standard specification, and the content and format of the metadata of service will be according to
The standard of ARCGIS Server needs the ID comprising figure layer Layers, figure layer name, whether defaults display, father's figure layer ID, subgraph
Layer ID, minimum scale, maximum ratio, ID, the list name of table Tables, georeferencing, initial range, global scope, coordinate
Unit, the essential informations such as picture format of support.
In step S3, service instance response starts corresponding GIS service process after the access request of client, passes through
Process manager in Service Instance monitors running state of process, that is, can determine whether the operating status of Service Instance, thus monitoring clothes
The access situation of business.Therefore, the present invention can be by being arranged the min/max process number of Service Instance indirectly come flexible configuration clothes
The min/max instance number of business.GIS process described in step S4 is a kind of Resident Process, i.e., completes in client to service
Then access is discharged to the reference of service after, the process for generating the service is placed to running background without being killed, for clothes
Pragmatic example continues to call when receiving the access request from client next time.
It should be noted that being to pass through process between the corresponding GIS service process that process manager starts to Service Instance
In thread communication, when process breaks down, the thread of process feeds back Trouble Report from trend process manager, thus process
Manager can know rapidly the fault condition and take corresponding subsequent operation, such as restart the process；When needing to stop
When process, process manager is sent to the thread of process stops message.
In step S4, for every GIS server, when servicing starting, default starts minimum instance number, when existing example
All in busy state, there is new service request arrival just to will start new Service Instance, but the example sum started will not surpass
Cross maximum instance number；When service instance number currently in use reaches maximum instance number, request the client of service that will be lined up etc.
It waits, until another client releases a certain service therein；If the maximum instance number being arranged is too small, client may need
The response to be serviced such as long period, if the maximum instance number of setting is excessive, server needs to occupy more memory；Therefore,
The min/max instance number for needing flexible configuration service, for the service infrequently used, a few peoples use in a short time,
It it is recommended that the min/max instance number of service is set as 0/1, and (is more than this according to business demand setting free instance runing time
Time, system terminate the example automatically)；For the service being commonly used, there is a large amount of service request daily, it is proposed that minimum/
Maximum instance number is set as equal, and paying attention to needing to configure enough instance numbers can be only achieved peak value and handle up, but Service Instance is matched
Set and excessively will increase the corresponding time, for complicated geographical processing service, maximum instance number should be arranged it is smaller, to protect GIS
Server resource.
The unified GIS service generated in step S4 is a kind of pondization service, and the example of service can be in multiple application programs
It is shared between session, i.e., client only uses the example during completing a request, can then discharge after the completion of request
Reference to service is returned directly in available Instances Pool.
Response results are returned to client by S5, Service Instance；
Specifically, the service result of response is returned to client by Service Instance, further includes the metadata of output service, i.e.,
Service the description information of the services such as output area, figure layer, coordinate system, coordinate unit.
Description through this embodiment, those skilled in the art can be understood that above-described embodiment method can borrow
Help software that the mode of required general hardware platform is added to realize, naturally it is also possible to which the former is by hardware, but in many cases
More preferably embodiment.Based on this understanding, technical solution of the present invention substantially tribute made to the prior art in other words
The part offered can be embodied in the form of software products, which is stored in a storage medium (such as
ROM/RAM, magnetic disk, CD) in, including some instructions use is so that a terminal device (can be mobile phone, computer, service
Device etc.) execute method described in the embodiment of the present invention.
The above is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (8)
1. a kind of spatial Information Service across GIS platform generates system, which is characterized in that including client's expression layer, Web application clothes
Business layer and data service layer, in which:
User issues access request in client's expression layer, and client's expression layer and Web application service layer communicate to connect；
The Web application service layer receives the access request of user and carries out Authority Verification, and permission passes through post-processing user's access
Response results are returned to client's expression layer by request；
The data service layer handles user access request for Web application service layer and provides data support, including different GIS platforms
The spatial data of offer.
2. the spatial Information Service according to claim 1 across GIS platform generates system, which is characterized in that the Web is answered
It further include Authority Verification module, Service Instance and GIS service process with service layer, in which:
Authority Verification module: for verifying client's expression layer to the access authority of respective service, request is handed over if permission passes through
It is received by Service Instance and is handled, return to the prompt information of denied access to client's expression layer if permission does not pass through；
Service Instance: customer table is returned to for receiving and handling the access request from client's expression layer, and by response results
Show layer, include corresponding service processes manager in each example of the Service Instance, for providing Service Instance starting
Corresponding GIS service process life cycle management；
GIS service process: in the categorical data called data service layer needed according to service the vector data of corresponding GIS platform and
Attribute data carries out data analysis, and encapsulates data into unified GIS service by standardizing process.
3. the spatial Information Service according to claim 2 across GIS platform generates system, which is characterized in that the GIS clothes
Business process is a kind of Resident Process, i.e., after client's expression layer is completed then to discharge to the reference of service the access of service, uses
Running background is placed to without being killed in the process for generating the service, and receiving for Service Instance in next time indicates from client
Continue to call when the access request of layer.
4. a kind of spatial Information Service generation method across GIS platform, which comprises the following steps:
S1, user issue service access request by Internet in client's expression layer；
S2, the service access permission by Authority Verification module verification from client's expression layer；
S3, Service Instance receive request, start corresponding GIS service process according to request, process manager monitoring process runs shape
State；
S4, GIS service process transfer the vector data and attribute data of corresponding GIS platform according to the categorical data that service needs,
Data analysis is carried out, and encapsulates data into unified GIS service by standardizing process；
Response results are returned to client's expression layer by S5, Service Instance.
5. the spatial Information Service generation method according to claim 4 across GIS platform, which is characterized in that the step
In S1, client's expression layer is asked with JSON character string to unified (instruction+parameter) service access of Web application service layer data format of transfering
It asks.
6. the spatial Information Service generation method according to claim 4 across GIS platform, which is characterized in that the step
It include corresponding service processes manager in each example of Service Instance in S3, for providing the phase of Service Instance starting
Answer the life cycle management of GIS service process.
7. the spatial Information Service generation method according to claim 4 across GIS platform, which is characterized in that the step
S4 specifically:
The service request of S41, GIS service process unserializing from client's expression layer, solution translate customer table and show in the request of layer
Specific instruction and parameter；
S42, GIS service process determine the categorical data of service needs according to instruction, and the arrow of GIS platform is transferred by relevant interface
Measure data and attribute data, illustrate that client's expression layer issues if relevant interface is not found be illegal request and it goes without doing goes out to ring
It answers；
S43, GIS service process will be transferred referring to the relevant criterion of Map Services under ARCGIS Server in step S42
GIS platform data are packaged into service, and select JSON that service is returned to client's expression layer as unified format.
8. the spatial Information Service generation method according to claim 4 across GIS platform, which is characterized in that the step
The unified GIS service generated in S4 is a kind of pondization service, and the example of service can carry out between multiple application program conversations
Shared, i.e., client's expression layer only uses the example during completing a request, can then discharge to service after the completion of request
Reference, is returned directly in available Instances Pool.
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