CN101751477A - SVG-based Web GIS building room query system and query method - Google Patents
SVG-based Web GIS building room query system and query method Download PDFInfo
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- CN101751477A CN101751477A CN201010107230A CN201010107230A CN101751477A CN 101751477 A CN101751477 A CN 101751477A CN 201010107230 A CN201010107230 A CN 201010107230A CN 201010107230 A CN201010107230 A CN 201010107230A CN 101751477 A CN101751477 A CN 101751477A
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Abstract
The invention discloses a SVG-based Web GIS building room query system and a query method; the query system comprises an image acquisition system, a building room query Web server and a local building room query system; wherein, the local building room query system is connected with the building room query Web server through Internet or LAN. The query method includes the following procedures: the query information is inputted to the local building room query system, the building room query Web server searches the XML files of building room attributes and calls the SVG file which stores the building room graph correspondingly, and then the SVG file is marked to inform the user the specific location information of the queried room. The SVG-based Web GIS building room query system and the query method has reasonable design, low investment cost, high query speed and good query effect, also has high popularization value, can solve the defects that the building query method in prior art has high investment cost, complicated operation procedures, and lacks of generality and flexibility in practical application.
Description
Technical field
The invention belongs to internet Geographic Information System (WebGIS) applied technical field, especially relate to a kind of WebGIS building room query system and querying method based on SVG.
Background technology
Along with the develop rapidly of urban construction, the seat seat high buildings and large mansions of various patterns are rised sheer from level ground, complicated and diversified building, people are gone out seek building and the room more and more difficult, pressing for provides visual concrete physical location inquiry service.The querying method in building and room has at present: database mode, GIS (Geographic Information System) mode and WebGIS (internet Geographic Information System) mode.Database mode is to use by setting up database storing building number and room number, searches by sql like language, and lookup result shows with the mode of table.The major defect of this querying method is to search not intuitively, seeks real physical location even know that building number and room number also need to waste time and energy.The GIS mode is to use by graph data and attribute data storage building number and room number, by the GIS inquiry system of setting up, with visual means directly perceived, convenient, interactive, to user's general performance several data information, as database, video and text.The subject matter of this querying method is: each client all will be equipped with expensive professional GIS software, and cost is too high; Maintenance cost is big; The data sharing difficulty; Complicated operation; Do not possess cross-platform characteristic.The internet Geographic Information System is that WebGIS is the GIS (abbreviation of Geographic Information System on the Internet, be Geographic Information System), it is to utilize Internet technology and www technology, improves and expand a new technology of traditional Geographic Information System function.Realize that the subject matter that GIS browses is that itself does not support vector graphics present browser on the net, for the head it off people CGI method, plug-in method method, ActiveX method have been proposed, based on the methods such as application program of Java Applet.These solutions are transmitted the GIS vector data on the internet and are often needed huge, expensive back-end data server and foreground client plug-in unit when showing, and use the transfer of using to Web thereby limited GIS.
To sum up, the building room query system of above-mentioned existing method realization can only be supported specifying the inquiry in building and room.If need inquire about, then must redesign also realize inquiry system, thereby not have dirigibility and versatility during practical application newly-built building.
Summary of the invention
Technical matters to be solved by this invention is at above-mentioned deficiency of the prior art, and the WebGIS building room query system based on SVG that a kind of modern design is reasonable, use is easy and simple to handle and cost of investment is low, result of use is good is provided.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of WebGIS building room query system based on SVG, it is characterized in that: comprise the image capturing system that is used to obtain by the entity pictorial information of inquiry building internal structure external structure, the building three-dimensional model of being set up according to the entity pictorial information is carried out figure conversion and is converted to the SVG Graphics Data File and local building room query system that building room query that building property file that corresponding foundation is associated with described SVG Graphics Data File is inquired about for inquiry system is used Web server and carried out two-way communication with Web server with described building room query; Described image capturing system and described building room query join with Web server; Described local building room query system and building room query are with being connected by Internet network or LAN (Local Area Network) between Web server, and the two forms a client/server formula Web system.
Described local building room query system and building room query are PC with Web server.
Described image capturing system is a video camera.
Simultaneously, the present invention provides also that a kind of method step is simple, intuitive display and fast, the economical and practical WebGIS building room query method based on SVG of inquiry velocity, it is characterized in that this method may further comprise the steps:
Step 1, obtain: adopt the image capturing system picked-up by the entity pictorial information of inquiry building internal structure external structure, and the entity pictorial information that is absorbed is sent to the building room query Web server by inquiry building entity pictorial information;
Building graph data XML document storehouse: with the XML document form, store the SVG pattern data information that is used to represent to be inquired about building, described SVG pattern data information comprises by the multiple element property parameter information of the corresponding SVG figure in each room in the inquiry building; And when setting up building graph data XML document storehouse, described building room query carries out the figure conversion with Web server (2) to described building three-dimensional model, and the corresponding SVG pattern data information that is converted to the storage of XML document form;
Building attribute data XML document storehouse: with the XML document form, store the attribute data information that is used to represent to be inquired about the building attribute, described attribute data information comprises by the title in each room in inquiry building and the building or numbering code and is inquired about the residing concrete physical location information in each room in building and the building;
Lexical analyzer: be used for obtaining search word according to the building room query information of current input;
Fuzzy query unit: be used for using described search word to search for the respective attributes data message in described building attribute data XML document storehouse;
Mapping table: be used for storing the mapping relations between the SVG pattern data information in the attribute data information in the described building attribute data XML document storehouse described building graph data XML document storehouse corresponding with it;
Correlation inquiry unit: be used for according to the attribute data information corresponding and the mapping relations of described mapping table with the building room query information of current input, corresponding SVG pattern data information in the related described building graph data XML document storehouse, definite SVG pattern data information that needs inquiry building room;
Parameter change unit: be used in described building graph data XML document storehouse, the SVG pattern data information that current definite need are inquired about the building room carries out parameter modification, specifically be that the respective element attribute parameter information of current definite SVG pattern data information is made amendment, realize that the building room of SVG pattern data information correspondence that the correlation inquiry unit is determined carries out the purpose of mark;
401, input building room query information: the Query Information that needs inquiry building room by local building room query system input;
402, setting up Web connects: local building room query system is connected with setting up Web between Web server with building room query by Internet network or LAN (Local Area Network);
403, building room query and mark: building room query calls in the building attribute data XML document storehouse that its inner set search module set up in step 3 with Web server, search out with step 401 in the corresponding attribute data information of building room query information imported, and by the mapping of described mapping table and inquire the SVG pattern data information corresponding with the attribute data information that searches out, simultaneously the SVG pattern data information that inquires is carried out parameter modification, realization is carried out mark to the building room corresponding with building room query information, just can intuitively find out the concrete physical location that needs inquiry building room afterwards on the display device of local building room query system.
Attribute data information in the XML document of building attribute data described in the above-mentioned steps three storehouse comprises by the residing buildings in inquiry building room, buildings, floor and room level Four attribute information.
Search module described in the above-mentioned steps 403 is the breadth-first search module.
Building room query described in the above-mentioned steps 403 is with being provided with the image processing module that the display image in the corresponding building of the SVG pattern data information behind parameter modification room is carried out convergent-divergent, translation and image restoring in the Web server.
Planimetric map to place, the building room floor of the SVG pattern data information correspondence behind the parameter modification shows building room query described in the step 403 and the floor level handled shows and processing module with being provided with in the Web server.
The present invention compared with prior art has the following advantages:
1, the WebGIS building room query system based on SVG that is adopted is novel in design rationally, use is easy and simple to handle and cost of investment is low, result of use good, is a kind of distributed system, has professional platform independence.The user need not install GIS data and application program on the local computer of oneself, as long as request is sent to Web server, Web server will send data and analysis result to user.
2, the building information that adopts the XML document form to store all SVG forms, clear in structure, self descriptiveness is strong, can be multiplexing and realize cross-platform data read, file committed memory space is little, has saved the resource of computing machine greatly.File layout is versatile and flexible, not only can use vector image and literal object, can include bitmap in equally, produces the effect that any other format-pattern can reach.
3, application value height, have versatility and dirigibility significantly, has versatility based on the building graph data XML document model of SVG image and the XML document model of building attribute data (being building graph data XML document storehouse and the building attribute data XML document storehouse of being set up), as long as change the XML document of building graph data and the XML document of storage building attribute data, just can form new building inquiry system.That is to say, for different building, can be according to the building graph data XML document model format of design and the XML document of building attribute data XML document model format establishment building data, corresponding XML document can be inquired about new building in the replacement system.And in modelling, for reasonable combination building information, convenient inquiry and demonstration have been carried out structural design to each XML document, set up the hierarchical structure based on groups of building, building, floor and the room data message of XML document.
4, result of use is good, can make the user conveniently inquire room information in the building, and can show intuitively.Simultaneously, the present invention also at the SVG figure set up amplification, dwindled, translation mechanism, provide building to carry out convergent-divergent, translation and restoring operation to inquiry, provide the planimetric map of building and stereographic map to show, make the user can more accurately understand its position.
5, novel in design rationally and practical value high, adopt SVG (Scalable VectorGraphics,) technology, by to DOM (Document Object Model, DOM Document Object Model) tree is set up the search inquiry algorithm, designed and Implemented site polling function, the accurate query function of room location, pantography, mobile and restoring function to building.The user is by input inquiry information, and system inquires about the back and marks out in SVG figure, makes the position in the understanding room that the user can be more convenient, has realized the function of building inquiries.
6, realize simple and easy and operation steps is simple, during actual the use, with user institute input inquiry information (as building number, room number, room title etc.) after the WebGIS building room query system is submitted to, the WebGIS building room query system is stored the XML file polling of building room attribute by search and is called the SVG file of corresponding storage building room figure, informs the more specific location information in room that the user inquires about by making marks in the SVG file.Native system can also carry out pantography, translation and restoring operation by user's button click, provides the planimetric map of building and stereographic map to show.
In sum, the present invention is reasonable in design, cost of investment is low, inquiry velocity is fast and inquire about effective, the application value height, can effectively solve the existing existing cost of investment height of building querying method, lack defective and deficiencies such as versatility and dirigibility when complex operation step and practical application, the present invention utilizes XML file storage building and room information, use the SVG store graphics data, show the building of inquiry and the physical location in room by the SVG polar plot, and comprehensively represent several data information to the user, building for example, the Query Information in floor and room, accurate or fuzzy query function, pantography, move and restoring function; Simultaneously, the present invention has versatility, for different building, only needs to replace XML data file wherein, and the SVG information of adding building just can be carried out the inquiry of building.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Description of drawings
Fig. 1 is the schematic block circuit diagram of WebGIS building room query system of the present invention.
Fig. 2 is the method flow diagram of WebGIS building room query method of the present invention.
Description of reference numerals:
The 1-video camera; The 2-building room query with the local building room query of Web 3-is
Server; System;
The 4-Internet network.
Embodiment
As shown in Figure 1 a kind of based on the SVG (abbreviation of Scalable Vector Graphics, be the scalable vector figure) the WebGIS building room query system, comprise the image capturing system that is used to obtain by the entity pictorial information of inquiry building internal structure external structure, to the building three-dimensional model of being set up according to the entity pictorial information carry out figure conversion and be converted to the SVG Graphics Data File and building property file that corresponding foundation is associated with described SVG Graphics Data File for the building room query usefulness Web server 2 of inquiry system inquiry and the local building room query system 3 that carries out two-way communication with Web server with described building room query.Described image capturing system and described building room query join with Web server 2.Described local building room query system 3 and building room query are connected by Internet network 4 or LAN (Local Area Network) with 2 of Web servers, and the two forms a client/server formula Web system.
In the present embodiment, described local building room query system 3 is PC with building room query with Web server 2, and described local building room query system 3 and building room query are connected by the Internet network with 2 of Web servers, and described image capturing system is a video camera 1.The quantity of described local building room query system 3 is a plurality of.
A kind of WebGIS building room query method based on SVG as shown in Figure 2 may further comprise the steps:
Step 1, obtain: adopt the image capturing system picked-up by the entity pictorial information of inquiry building internal structure external structure, and the entity pictorial information that is absorbed is sent to building room query with Web server 2 by inquiry building entity pictorial information.
Building graph data XML document storehouse: with the XML document form, store the SVG pattern data information that is used to represent to be inquired about building, described SVG pattern data information comprises by the multiple element property parameter information of the corresponding SVG figure in each room in the inquiry building; And when setting up building graph data XML document storehouse, described building room query carries out the figure conversion with 2 pairs of described building three-dimensional models of Web server, and the corresponding SVG pattern data information that is converted to the storage of XML document form;
Building attribute data XML document storehouse: with the XML document form, store the attribute data information that is used to represent to be inquired about the building attribute, described attribute data information comprises by the title in each room in inquiry building and the building or numbering code and is inquired about the residing concrete physical location information in each room in building and the building.In the present embodiment, attribute data information in the described building attribute data XML document storehouse comprises by the residing buildings in inquiry building room, buildings, floor and room level Four attribute information, wherein can include a plurality of buildingss in the buildings, a plurality of floors can be included in the buildings, a plurality of rooms can be included in the floor;
Lexical analyzer: be used for obtaining search word according to the building room query information of current input;
Fuzzy query unit: be used for using described search word to search for the respective attributes data message in described building attribute data XML document storehouse;
Mapping table: be used for storing the mapping relations between the SVG pattern data information in the attribute data information in the described building attribute data XML document storehouse described building graph data XML document storehouse corresponding with it;
Correlation inquiry unit: be used for according to the attribute data information corresponding and the mapping relations of described mapping table with the building room query information of current input, corresponding SVG pattern data information in the related described building graph data XML document storehouse, definite SVG pattern data information that needs inquiry building room;
Parameter change unit: be used in described building graph data XML document storehouse, the SVG pattern data information that current definite need are inquired about the building room carries out parameter modification, specifically be that the respective element attribute parameter information of current definite SVG pattern data information is made amendment, realize that the building room of SVG pattern data information correspondence that the correlation inquiry unit is determined carries out the purpose of mark.
401, input building room query information: the Query Information that needs inquiry building room by local building room query system 3 inputs;
402, setting up Web connects: local building room query system 3 is set up Web with building room query with 2 of Web servers by Internet network 4 or LAN (Local Area Network) and is connected;
403, building room query and mark: building room query calls in the building attribute data XML document storehouse that its inner set search module set up in step 3 with Web server 2, search out with step 401 in the corresponding attribute data information of building room query information imported, and by the mapping of described mapping table and inquire the SVG pattern data information corresponding with the attribute data information that searches out, simultaneously the SVG pattern data information that inquires is carried out parameter modification, realization is carried out mark to the building room corresponding with building room query information, just can intuitively find out the concrete physical location that needs inquiry building room afterwards on the display device of local building room query system 3.
Search module described in the step 403 is the breadth-first search module, and described building room query is with being provided with the image processing module that the display image in the corresponding building of the SVG pattern data information behind parameter modification room is carried out convergent-divergent, translation and image restoring in the Web server 2.Simultaneously, the described building room query floor level demonstration and the processing module that show and handles with the planimetric map that also is provided with place, the building room floor that need inquiries building room promptly has been labeled in the Web server 2.
In the present embodiment, when a complicated teaching building room that is divided into 4 districts is inquired about, each classroom number is made up of 4 codings, example " 4203 " is expressed as the 2 floor room 03, building in the 4th district, the classroom number that input will be inquired about in input frame, this sentences " 4203 " and is example, after the click on submission button, just can be at the illustraton of model of seeing this complexity teaching building at interface, wherein red part of glittering is exactly " 4203 " classroom.If think further to check position more specifically, then can click " checking planimetric map " button and transfer the planimetric map that needs two layers of inquiry place, classroom teaching buildings by building room query with Web server 2, wherein red place of glittering is " 4203 " classroom that will look for.
During actual search, after the user imported room number, whether the corresponding inspection user input of system's meeting was legal, if non-rule requires the user to re-enter; If legal, then in the XML document of storage building attribute data, carry out width searches, whether the inquiry room exists, and if there is no, can inform that then the room that the user inquires about does not exist; If the room exists, then access corresponding SVG figure, and carry out the element inquiry to accessing the SVG figure, and the color in mark respective queries room (that is to say, when revising the element parameter, mainly be that the color elements in the SVG graph data is made amendment), to inform the user inquiring result, make the user understand the particular location in room.Correspondingly, to accessing and the SVG figure of mark carries out convergent-divergent and restoring operation all based on the constant technology in center, be by calculating current viewbox central point, revise zooming parameter, recomputate the upper left corner coordinate of wide and high, viewbox that calculating is new of new viewbox and figure and more newly arrive and finish corresponding operation.
To sum up, during actual queries, adopt 1 pair of building internal structure external structure of video camera to take earlier, again the entity picture information translation of taking is become the building three-dimensional model, document model according to the building graph data XML document storehouse of designing carries out the figure conversion then, is converted into the XML file of graph data and sets up building graph data XML document storehouse; Secondly, according to the document model in the building attribute data XML document storehouse of designing, set up the XML file of building attribute and set up building attribute data XML document storehouse.Import the Query Name in need inquiry building room as the user after, it (specifically is the query search algorithm of setting up by DOM (Document Object Model) tree that building room query just can utilize the breadth-first search module of design with Web server 2,) dom tree of the building attribute XML file in the building attribute data XML document storehouse is searched for, after searching this Query Name, mapping relations by mapping table map out building graph data XML file, and find corresponding SVG figure; Then, show the physical location in building, floor or concrete room and for information about with the Web technology.
Briefly, the present invention adopts breadth-first search algorithm, the building attribute data XML document storehouse of search storage building attribute data, and call based on the SVG graph data in the building graph data XML document storehouse of SVG image by mapping relations, dynamic afterwards in the SVG graph data that accesses mark and revise the current color parameter that needs inquiry building room element, just can intuitively show the physical location that needs the inquiry room subsequently, simultaneously the user can be to mark result's SVG picture carry out convergent-divergent, translation and restoring operation.
The above; it only is preferred embodiment of the present invention; be not that the present invention is imposed any restrictions, everyly any simple modification that above embodiment did, change and equivalent structure changed, all still belong in the protection domain of technical solution of the present invention according to the technology of the present invention essence.
Claims (8)
1. WebGIS building room query system based on SVG, it is characterized in that: comprise the image capturing system that is used to obtain by the entity pictorial information of inquiry building internal structure external structure, the building three-dimensional model of being set up according to the entity pictorial information is carried out the figure conversion and is converted to the SVG Graphics Data File and the building room query usefulness Web server (2) of the building property file confession inquiry system inquiry that corresponding foundation is associated with described SVG Graphics Data File and the local building room query system (3) that carries out two-way communication with Web server with described building room query; Described image capturing system and described building room query join with Web server (2); Described local building room query system (3) and building room query are with being connected by Internet network (4) or LAN (Local Area Network) between Web server (2), and the two forms a client/server formula Web system.
2. according to the described WebGIS building room query system based on SVG of claim 1, it is characterized in that: described local building room query system (3) is PC with building room query with Web server (2).
3. according to claim 1 or 2 described WebGIS building room query systems based on SVG, it is characterized in that: described image capturing system is video camera (1).
4. utilize and as claimed in claim 1ly carry out the method for building room query, it is characterized in that this method may further comprise the steps based on the WebGIS building room query system of SVG:
Step 1, obtain: adopt the image capturing system picked-up by the entity pictorial information of inquiry building internal structure external structure, and the entity pictorial information that is absorbed is sent to building room query with Web server (2) by inquiry building entity pictorial information;
Step 2, building three-dimensional model are set up: described building room query with Web server (2) according to the entity pictorial information that is received, and the building three-dimensional model of employing routine building thing three-dimensional model method for making foundation quilt inquiry building, described building room query is provided with the three-dimensional model making module that is used to make three-dimensional model building with correspondence in the Web server (2);
Step 3, building room query service system are set up: described building room query is set up the building room query service system with Web server (2) according to the building three-dimensional model of being set up, and the building room query service system of being set up comprises:
Building graph data XML document storehouse: with the XML document form, store the SVG pattern data information that is used to represent to be inquired about building, described SVG pattern data information comprises by the multiple element property parameter information of the corresponding SVG figure in each room in the inquiry building; And when setting up building graph data XML document storehouse, described building room query carries out the figure conversion with Web server (2) to described building three-dimensional model, and the corresponding SVG pattern data information that is converted to the storage of XML document form;
Building attribute data XML document storehouse: with the XML document form, store the attribute data information that is used to represent to be inquired about the building attribute, described attribute data information comprises by the title in each room in inquiry building and the building or numbering code and is inquired about the residing concrete physical location information in each room in building and the building;
Lexical analyzer: be used for obtaining search word according to the building room query information of current input;
Fuzzy query unit: be used for using described search word to search for the respective attributes data message in described building attribute data XML document storehouse;
Mapping table: be used for storing the mapping relations between the SVG pattern data information in the attribute data information in the described building attribute data XML document storehouse described building graph data XML document storehouse corresponding with it;
Correlation inquiry unit: be used for according to the attribute data information corresponding and the mapping relations of described mapping table with the building room query information of current input, corresponding SVG pattern data information in the related described building graph data XML document storehouse, definite SVG pattern data information that needs inquiry building room;
Parameter change unit: be used in described building graph data XML document storehouse, the SVG pattern data information that current definite need are inquired about the building room carries out parameter modification, specifically be that the respective element attribute parameter information of current definite SVG pattern data information is made amendment, realize that the building room of SVG pattern data information correspondence that the correlation inquiry unit is determined carries out the purpose of mark;
Step 4, building room query, its query script is as follows:
401, input building room query information: the Query Information that needs inquiry building room by local building room query system (3) input;
402, setting up Web connects: local building room query system (3) is connected with setting up Web between Web server (2) with building room query by Internet network (4) or LAN (Local Area Network);
403, building room query and mark: building room query calls in the building attribute data XML document storehouse that its inner set search module set up in step 3 with Web server (2), search out with step 401 in the corresponding attribute data information of building room query information imported, and by the mapping of described mapping table and inquire the SVG pattern data information corresponding with the attribute data information that searches out, simultaneously the SVG pattern data information that inquires is carried out parameter modification, realization is carried out mark to the building room corresponding with building room query information, just can intuitively find out the concrete physical location that needs inquiry building room afterwards on the display device of local building room query system (3).
5. according to the described WebGIS building room query method based on SVG of claim 4, it is characterized in that: the attribute data information in the attribute data of building described in the step 3 XML document storehouse comprises by the residing buildings in inquiry building room, buildings, floor and room level Four attribute information.
6. according to claim 4 or 5 described WebGIS building room query methods based on SVG, it is characterized in that: the search module described in the step 403 is the breadth-first search module.
7. according to claim 4 or 5 described WebGIS building room query methods based on SVG, it is characterized in that: building room query described in the step 403 is with being provided with the image processing module that the display image in the corresponding building of the SVG pattern data information behind parameter modification room is carried out convergent-divergent, translation and image restoring in the Web server (2).
8. according to claim 4 or 5 described WebGIS building room query methods based on SVG, it is characterized in that: planimetric map to place, the building room floor of the SVG pattern data information correspondence behind the parameter modification shows building room query described in the step 403 and the floor level handled shows and processing module with being provided with in the Web server (2).
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