CN113010627A - City information model service method - Google Patents
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Abstract
A city information model service method, through the arrangement of the spatial database, etc., has realized the city information model is reused under different application scenes, and the error rate of data derivation is low, when receiving the service request that the external application sends out, call the city information model corresponding to said service request from the said spatial database; when the service request comprises an analysis condition, calling a city information model corresponding to the analysis condition from the spatial database; when receiving a service request sent by an external application, the matching parameters are given to the service request of the external application.
Description
Technical Field
The invention discloses 2017111037291 series of applications, relates to the technical field of three-dimensional model application, and particularly relates to a city information model service method.
Background
The city information model takes the city information data as a cardinal number, and establishes a three-dimensional city space model and an organic complex of the city information. With the development of digital cities and smart cities in China, the three-dimensional information management and construction of cities are rapidly promoted in various fields. The city information model data of all parts and places are more and more, and meanwhile, a large number of city model application systems are also appeared. However, most of the urban information model applications are mainly based on three-dimensional visualization, and the value of three-dimensional model data is not fully applied to industrial business. Because the data formats of the three-dimensional model systems in different industries are different at present and uniform semantic information does not exist, the three-dimensional model data of different industries or different systems in the same urban area cannot be reused.
The technical defects of the existing urban information model data application system are mainly expressed in the following aspects: 1) the three-dimensional model data is stored in a file system, which is not beneficial to retrieval and maintenance; 2) the three-dimensional model data is not uniformly defined, the data information content is mainly represented by a spatial position and a graph, and semantic information is not available; and the semantic information is the basis for connecting the urban information model data and the business application system. 3) The model data and the application program are often deeply bound and have strong coupling, and the three-dimensional model data or functions built by one system are difficult to be reused by other systems.
To this end, the document "3D City database for City gml" published by Thomas h.kolbe et al provides a three-dimensional City database file based on the City gml format, the three-dimensional City model is used as a comprehensive information backbone representing relevant City entities and their spatial, semantic and visual attributes, the three-dimensional City database is a free open source package, consists of a database and a set of software tools, the virtual three-dimensional City model can be imported, managed, analyzed, visualized and exported according to the City gml standard, since the City three-dimensional database is based on the City gml format, the interactive data exchange from the user application to the database can be performed in at least two ways, one way is that the three-dimensional City database WFS elements can exchange data in 2.0 or 1.0 versions by using the included high performance City gml import/export tools or the included basic Web element service 2.0 version, the three-dimensional City database WFS elements can send corresponding client requests to the client, the GetFeature operation allows clients to query the CityGML elements from a three-dimensional city database, e.g., the web element service will use gml: a CityGMLcity object whose ID value matches ID _0815 responds to the request. And also discloses a light analysis method, which calculates the solar energy directly and diffusely irradiated to the wall and roof of the building, and the building projection, the digital surface model and the digital elevation model, the energy and irradiance value per month and the sky landscape factor are taken as general attributes to be added to all the wall and roof surface objects and to be added to all the buildings in a polymerization form, however, in the scheme, the result of the analysis after transformation is not obtained through transformation, that is, the result after analysis is not obtained by transforming the city information model according to the analysis conditions. Further, when the city information model is sent to an external application through the Web element service, since the export is required to be performed individually, the export efficiency is greatly reduced, and the export may be wrong and unsupported.
Different scene applications of three-dimensional city databases capable of reducing the derivation error rate do not exist in the prior art.
Disclosure of Invention
In view of this, an object of the embodiments of the present invention is to provide a service method for a city information model, which realizes reuse of the city information model in different application scenarios through setting a spatial database, and has a low error rate in data derivation.
Specifically, according to a first aspect of the present invention, an embodiment of the present invention provides a city information model service method, including:
storing a city information model in a spatial database, wherein the format of the city information model is CityGML;
when a service request sent by an external application is received, calling a city information model corresponding to the service request from the spatial database;
sending the city information model to the external application through a Web element service, wherein when a service request sent by the external application is received, the retrieving the city information model corresponding to the service request from the spatial database comprises:
when the service request comprises a query condition, calling a city information model corresponding to the query condition from the spatial database;
arranging the city information models which are consistent with the query conditions into a query result table according to a preset mode;
when receiving a service request sent by an external application, the retrieving a city information model corresponding to the service request from the spatial database further comprises:
when the service request comprises an analysis condition, calling a city information model corresponding to the analysis condition from the spatial database;
transforming the city information model according to the analysis conditions to obtain an analyzed result;
the sending the city information model to the external application through the Web element service includes:
when the service request comprises a query condition, sending the query result table to the external application through a Web element service;
and when the service request comprises an analysis condition, sending the analyzed city information model to the external application through a Web element service.
Further, the city information model service method further comprises the following steps:
and previewing the query result table and the analyzed city information model by the model data browsing client.
According to a second aspect of the present invention, an embodiment of the present invention provides a city information model service apparatus, including:
the storage module is used for storing the city information model in a spatial database, wherein the format of the city information model is CityGML;
the analysis module is used for calling a city information model corresponding to a service request from the spatial database when the service request sent by the external application is received;
and the sending module is used for sending the city information model to an external application through the Web element service.
Further, the analysis module further comprises:
the query unit is used for calling a city information model corresponding to the query condition from the spatial database when the service request comprises the query condition;
and the query result generating unit is used for arranging the city information models which are consistent with the query conditions into a query result table according to a preset mode.
The embodiment of the invention provides a city information model service method and a device, wherein the city information model service method comprises the following steps: firstly, storing a city information model in a spatial database, wherein the city information model stored in the spatial database is in a format of CityGML, then, when receiving a service request sent by an external application, calling the city information model corresponding to the service request from the spatial database, and then, sending the city information model to the external application for use through a Web element service, in the city information model service method, the city information model is stored in the spatial database in a uniform format (namely, the format of the CityGML), when the external application sends the service request, the corresponding city information model can be sent to the external application for use through the Web element service, through the processing procedures, the uniform storage of the city information model is realized, the use of different external applications is facilitated, and thus, the display mode that the traditional city information model is mainly presented in a spatial position and a figure is changed, the urban information model can be repeatedly utilized under different application scenes, and convenience and rapidness are realized.
According to another preferred embodiment of the present invention, in the city information model service method and apparatus provided by the present invention, when receiving the service request sent by the external application, the matching parameter is given to the service request of the external application, the matching parameter is obtained according to evaluation information of processing derived information (received information) in a history process of a processing target, the Web semantic attribute query information and the matching parameter are input into an ant colony algorithm model to obtain a matching result between the Web semantic attribute query information and the matching parameter, distributing the query information of the city information model under different application scenes according to the matching result, the nodes of the ant colony algorithm model comprise types, fields and the like, the ant colony algorithm has distributed calculation, unique positive feedback characteristic and strong heuristic search characteristic, by introducing the ant colony algorithm model, the Web semantic attribute query is more accurate, and the method has the advantages of cloud computing in other aspects.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
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, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a flow chart illustrating a city information model service method provided by an embodiment of the invention;
FIG. 2 is a structural framework diagram of a city information model service system provided by an embodiment of the invention;
fig. 3 shows a structural connection diagram of a city information model service system provided by the embodiment of the invention.
Icon: 1-a spatial database; 2-a city information model service system; 3-a storage module; 4-an analysis module; 5-sending module.
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. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
At present, three-dimensional model systems are widely applied in various industries, but the three-dimensional model systems applied in different industries are different in data format and have no uniform semantic information, so that the three-dimensional model data in different industries in different areas of the same city (or in different areas of different cities) cannot be reused. The technical defects of the existing urban information model data application system are mainly expressed in the following aspects: 1) the three-dimensional model data is stored in a file system, which is not beneficial to retrieval and maintenance. 2) The three-dimensional model data is not uniformly defined, the data information content is mainly represented by a spatial position and a graph, and semantic information is not available; and the semantic information is the basis for connecting the urban information model data and the business application system. 3) Model data and application programs are often deeply bound, coupling is strong, three-dimensional model data or functions built by one system are difficult to be repeatedly utilized by other systems, and external application is inconvenient to operate in the process of using a city information model, needs to rebuild the three-dimensional model data, and is time-consuming and labor-consuming.
Based on this, embodiments of the present invention provide a method and a system for city information model service, which are described below by embodiments.
Example 1
Referring to fig. 1, the city information model service method provided by this embodiment specifically includes the following steps:
step S101: storing a city information model in a spatial database 1, wherein the city information model is in a format of city gml.
Step S102: when a service request from an external application is received, a city information model corresponding to the service request is retrieved from the spatial database 1.
Step S103: and sending the city information model to an external application through the Web element service.
As will be explained in detail below, in step S101, the city information model is stored in the spatial database 1, where the format of the city information model is CityGML, and specifically includes:
(1) and judging whether the format of the city information model is CityGML.
The City Information model (called City Information Modeling) is an organic integration of a three-dimensional City space model and City Information, which is established by taking City Information data as a cardinal number. For example, the city information model of city a includes an organic combination of GIS data of the entire scene of the area where city a is located, BIM data of buildings in various areas of city a, and the internet of things.
The CityGML is a generic data model used to express three-dimensional city templates, which defines the types and interrelationships of the most common surface objects in cities and regions, and also integrates the attributes of the objects in terms of geometry, topology, semantics, appearance, etc. Besides, the CityGML also includes the hierarchy, aggregation, relationship and spatial attributes between the subject types. The topical information is not only in a graph exchange format, but also can be used in analysis in various application fields, such as scene simulation, city data mining, facility management, topical query, etc.
Therefore, the city information model in the CityGML format can be applied in different scenes. In the city information model service method, firstly, whether the format of the city information model is CityGML is judged, which is the basis for ensuring whether the city information model can be used in different scenes.
(2) If the above determination is yes, the city information model is stored in the spatial database 1.
First, a spatial database is introduced, which refers to the sum of geospatial data related to applications stored by a geographic information system on a computer physical storage medium, generally organized on the storage medium in the form of a series of files of a specific structure. The method aims to rapidly draw various economic thematic maps by effectively utilizing satellite remote sensing resources. Because the traditional database system only aims at simple objects, complex objects (such as graphics and images) cannot be effectively supported. The spatial database is a data set related to certain spatial element characteristics in a certain area, and is a sum of spatial data which are stored on a physical medium by the GIS and are related to applications. Compared with other databases, the spatial database has huge data volume, and the capacity generally reaches GB level; the accessibility is high, the efficient access of a large amount of data can be supported, and the reaction speed is high; the data items may be of variable length, and when one or more objects are included, nested records may be implemented, etc.
That is, in the city information model service method, the purpose of storing the city information model in the city gml format in the spatial database 1 is achieved.
When receiving a service request from an external application, the step S102 of retrieving a city information model corresponding to the service request from the spatial database 1 includes:
first, it should be noted that the interface of the spatial database 1 to the external Service is performed by the Web Feature Service 2.0 in the standard OGC Service interface, and the Service can query the model data in various query modes, including spatial query, (semantic) attribute query and combined query. The OGC (Open geographic information Consortium-OGC), which is known in chinese as Open geographic information Consortium, aims at standardizing the software and data and services for providing the geographic information industry, and allows clients to obtain Geospatial data encoded using a geomarkup language from a plurality of Web vector services, in which five operations are defined, getcapabilities returning a Web vector service capability description document (described in XML), descripbeateuretype returning an XML document describing any vector structure that can provide a service, GetFeature serving a request to obtain a vector instance, Transaction request serving Transaction requests, LockFeature handling a request to lock one or more vector type instances during a Transaction.
It should be noted that (1) when a service request from an external application is received, the type of the city information model corresponding to the service request is detected, and since the city information models previously stored in the spatial database 1 are all in the city gml format. When the type of the city information model is detected to be city GML, the city information model corresponding to the service request is called from the spatial database 1, namely the stored city information model is directly obtained from the spatial database 1 to be analyzed and then sent to an external application.
When receiving a service request from an external application, the step S102 of retrieving a city information model corresponding to the service request from the spatial database 1 includes:
(1) when a query condition is included in the service request, a city information model corresponding to the query condition is retrieved from the spatial database 1, for example, the query condition is input to display all buildings having a height greater than 100 meters, all bridge models are queried, and the like.
(2) And arranging the city information models which are consistent with the query conditions into a query result table according to a preset mode. All the city information models corresponding to the query conditions are selected from the spatial database 1, and all the selected corresponding city information models are arranged into a query result table according to a preset pattern, where it should be noted that the preset pattern can be flexibly set according to a usage scenario and a usage habit of a user, for example, according to a setup time of the s city information model, according to a size of the city information model, and the like.
Step S102, when receiving a service request from an external application, retrieving a city information model corresponding to the service request from the spatial database 1 further includes:
(1) when the service request includes the analysis condition, the spatial database 1 retrieves the city information model corresponding to the analysis condition, where it should be noted that the analysis condition includes all conditions capable of performing attribute transformation on the city information model, for example, when the analysis condition is illumination analysis, the spatial database 1 retrieves the city information model corresponding to the illumination analysis condition.
(2) And transforming the city information model according to the analysis conditions to obtain the analyzed city information model. After the city information model corresponding to the illumination analysis condition is obtained, the city information model is transformed according to the illumination analysis condition, namely, the city information model is respectively marked (or colored and the like) according to different illumination conditions to form another expression form of the city information model which accords with the analysis condition.
The step S103 of transmitting the city information model to the external application through the Web element service includes:
(1) when the Service request includes the query condition, the query result table is sent to the external application through the Web element Service, and the Web element Service, namely the Web Feature Service 2.0, sends the query result table to the external application through the Service, where the external application should be understood as the application that sends the Service request for use by the external application, and the number of the external applications is not limited to one.
(2) And when the service request comprises the analysis condition, transmitting the analyzed city information model to an external application through the Web element service. In the present embodiment, as shown in fig. 2, the Web Feature Service 2.0 serving as a Web element Service transmits the analyzed city information model to an external application through the Service, where the external application is an application that issues a Service request and is used by the external application, and the number of the external applications is not limited to one.
The method may further include, when receiving a service request issued by an external application, assigning a matching parameter to the service request issued by the external application, where the matching parameter is obtained according to evaluation information of processing derived information (received information) in a history process of a processing target, inputting the Web semantic attribute query information and the matching parameter into an ant colony algorithm model to obtain a matching result therebetween, and distributing query information for the city information model in different application scenarios according to the matching result, where nodes of the ant colony algorithm model include types, fields, and the like, and the ant colony algorithm has distributed computation, a unique positive feedback characteristic, and a strong heuristic search characteristic, and by introducing the ant algorithm model, Web semantic attribute query is more accurate, and has advantages in other aspects of cloud computation.
When a service request sent by an external application is received, an evaluation score given to a processing target in a history process of the processing target is used as evaluation information, a time score of the target processing is determined, the average of the evaluation score and the time score is used as a matching parameter of the processing target, when the ant colony algorithm model is used for calculation, when the number of the processing targets is smaller than a critical number, a return value is determined according to the matching parameter of the processing target, when the number of the processing targets is larger than the critical number, the return value is randomly determined, the return value is 0 and 1, 0 represents mismatch, and 1 represents match.
In addition, the city information model service method also comprises modules for providing cache, safety, logs and the like of services besides the functions of providing the model query and analysis, and the details are not repeated.
In addition, the city information model service method further comprises the following steps: and previewing the query result table and the analyzed city information model by the model data browsing client. The preview of the city information model is realized based on WebGL (Web Graphics Library), WebGL is a 3D drawing protocol, JavaScript and OpenGL ES 2.0 are combined together, so that 3D scenes and models can be displayed more smoothly in a browser by means of a system display card, the trouble of developing special rendering plug-ins for webpages is avoided, the WebGL realizes the manufacture of Web interactive three-dimensional animation through HTML scripts without the support of any browser plug-ins, and the Graphics rendering by utilizing the Graphics hardware acceleration function of the bottom layer is realized through a uniform and cross-platform OpenGL interface. In the method, the city information model is previewed by the model data browsing client, so that the client can conveniently check the city information model.
In summary, the city information model service method provided in this embodiment includes: firstly, storing a city information model in a spatial database 1, wherein the city information model is in a format of CityGML, secondly, when receiving a service request sent by an external application, calling the city information model corresponding to the service request from the spatial database 1, and then sending the city information model to the external application through a Web element service, so that the city information model is stored in the spatial database 1 in a uniform format of CityGML through the operation of the steps, and when the external application has the service request, the city information model is sent to the external application through the Web element service, thereby realizing the reutilization of the city information model under different application scenes, and being convenient and fast.
Example 2
Referring to fig. 3, the present embodiment provides a city information model service system 2 including: the system comprises a storage module 3, an analysis module 4 and a transmission module 5 which are connected in sequence, wherein when in use, the storage module 3 is used for storing a city information model in a spatial database 1, the city information model is in a CityGML format, the analysis module 4 is used for calling the city information model corresponding to a service request from the spatial database 1 when receiving the service request sent by an external application, and the transmission module 5 is used for transmitting the city information model to the external application through a Web element service.
Furthermore, the analysis module 4 further comprises: the query unit is used for calling the city information model corresponding to the query condition from the spatial database 1 when the service request comprises the query condition, and the query result generating unit is used for arranging the city information models conforming to the query condition into a query result table according to a preset mode.
In summary, the city information model service system 2 provided in this embodiment includes: the city information model management system comprises a storage module 3, an analysis module 4 and a transmission module 5 which are connected in sequence, wherein when the city information model management system is used, the storage module 3 is used for storing the city information model in a spatial database 1, the city information model is in a CityGML format, the analysis module 4 is used for calling the city information model corresponding to a service request from the spatial database 1 when the service request sent by an external application is received, the transmission module 5 is used for transmitting the city information model to the external application through Web element service, the city information model has a uniform storage standard through the arrangement of the modules, and the city information model can provide services for different external applications, and is convenient and fast.
The computer program product of the city information model service method and system provided by the embodiment of the present invention includes a computer readable storage medium storing a program code, and instructions included in the program code may be used to execute the method described in the foregoing method embodiment, and specific implementation may refer to the method embodiment, and will not be described herein again.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the system and the apparatus described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In addition, in the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. The city information model service method is characterized by comprising the following steps:
storing a city information model in a spatial database, wherein the format of the city information model is CityGML;
when a service request sent by an external application is received, calling a city information model corresponding to the service request from the spatial database;
sending the city information model to the external application through a Web element service, wherein when a service request sent by the external application is received, the retrieving the city information model corresponding to the service request from the spatial database comprises:
when the service request comprises a query condition, calling a city information model corresponding to the query condition from the spatial database;
arranging the city information models which are consistent with the query conditions into a query result table according to a preset mode;
when receiving a service request sent by an external application, the retrieving a city information model corresponding to the service request from the spatial database further comprises:
when the service request comprises an analysis condition, calling a city information model corresponding to the analysis condition from the spatial database;
transforming the city information model according to the analysis conditions to obtain an analyzed result;
the sending the city information model to the external application through the Web element service includes:
when the service request comprises a query condition, sending the query result table to the external application through a Web element service;
and when the service request comprises an analysis condition, sending the analyzed city information model to the external application through a Web element service.
2. The method of claim 1, wherein storing the city information model in a spatial database, wherein the city information model is in a format of city gml comprises:
judging whether the format of the city information model is CityGML or not;
and if so, storing the city information model in a spatial database.
3. The city information model service method according to claim 1, further comprising:
and previewing the query result table and the analyzed city information model through a model data browsing client.
4. The city information model service method according to claim 1, further comprising: when receiving a service request sent by an external application, the matching parameters are given to the service request of the external application.
5. The city information model service method according to claim 4, wherein the matching parameter is obtained according to evaluation information of processing derived information in a history process of processing a target, the Web semantic attribute query information and the matching parameter are input to an ant colony algorithm model to obtain a matching result therebetween, and query information for the city information model in different application scenarios is distributed according to the matching result.
6. The city information model service method of claim 5, wherein the nodes of the ant colony algorithm model comprise types.
7. The city information model service method of claim 5, wherein the nodes of the ant colony algorithm model comprise domains.
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