CN101290573A - Trans-platform embedded geographical information systems - Google Patents
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Abstract
The invention discloses a cross-platform embedded geographical information system, which comprises an application program layer, a data service middleware layer, a data engine layer, a platform correlation module layer, a basic algorithm module, a geographical resource file layer, and an operating system layer. The system also comprises a cross-platform embedded GIS foundation class library, wherein, the class library respectively defines the related information of the application program layer, the data service middleware layer, the data engine layer, the platform correlation module layer, the basic algorithm module, the geographical resource file layer and the operating system layer. The cross-platform embedded geographical information system can synchronously integrate a plurality of heterogeneous embedded GIS data resources by using different data engine layers; at the same time, the cross-platform embedded geographical information system can be directly operated on a plurality of embedded operating systems without modification by substituting different platform correlation module layers.
Description
Technical field
The invention belongs to technical field of information processing, relate to a kind of Geographic Information System, relate in particular to a kind of embedded geographical information systems.
Background technology
Because what GIS (Geographic Information System) comprised contains much information, it is handled the hardware requirement height, always is on the PC that is applied in workstation and top grade.But along with the continuous development of computer science and technology, the performance of embedded mobile device (car-mounted terminal, palm PC (PDA), smart mobile phone etc.) is greatly improved.The GIS The Application of Technology has progressively entered the back PC stage.
The application of current Embedded GIS is mainly in following field: 1) auto navigation application market.Comprise the location navigation of special cars such as taxi, police car, armoured van, ambulance and the location navigation of normal domestic car.Someone has made simple computation with Beijing, and Beijing has 100,000 taxis approximately, all loads onto navigation positioning system, is exactly 500,000,000 market with every 5000 yuan of calculating, and therefore estimate should be more than 10,000,000,000 for the market scale in the whole nation.2) PDA, mobile phone GIS use.On this platform, can develop various professional application softwares, as application such as field survey, data acquisition, city guide, tourism guides.Also the someone estimated, if month geographic information services of 5 yuan of China 100,000,000 cellphone subscribers, 1 year will be 6,000,000,000 market.
Current, the most popular Embedded GIS development platform has MapX Mobile, the ArcPad of ERIS company, the eSuperMap of hypergraph company and the hMap of Wuhan University etc. of MapInfo company both at home and abroad.These products are comparative maturity, powerful and differ from one another all.
Through a large amount of experiment and analysis, also there is following problem in technique scheme:
1) almost not providing any support to cross-platform, mainly all is at a certain operating system and data engine exploitation.
2) extensibility of product is not enough.When system design, lack and consider that the user will expand the demand of product from now on.
3) the geodata resource format is single, does not support the integrated of isomery geodata resource.
4) the GIS data do not have dynamic.
5) data storage is loose, the data management confusion.
6) efficient of data manipulation is low.These problems cause product generally to have certain limitation.
Summary of the invention
Technical matters to be solved by this invention is: a kind of trans-platform embedded geographical information systems is provided.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
A kind of trans-platform embedded geographical information systems, this system comprises:
Application layer, be used to carry out map basic operation, inquire about all kinds of geography information, path analysis and data acquisition; And
The data, services middleware layer, connect described application layer, comprise engineering management module, geodata administration module, video data administration module, this data, services middleware layer is used for the realization details of application programs layer shielding bottom, and the access interface of geodata and video data is provided to the upper strata by geodata administration module and video data administration module; And
The data engine layer connects described data, services middleware layer; And
Platform correlation module layer connects described data engine layer, and all operations relevant with specific operation system concentrated in together; And
The basic algorithm assembly connects described data engine layer, and this basic algorithm assembly comprises the GIS algorithm and the data structure of the required use of described Geographic Information System; And
The geographical resource file layers connects described data engine layer and platform correlation module layer, is used to provide the information of geographical resource; And
Operating system layer connects described geographical resource file layers, and this operating system layer comprises some embedded platforms.
As a preferred embodiment of the present invention, described system also comprises a class libraries, and this class libraries is the relevant information of definition application layer, data, services middleware layer, data engine layer, platform correlation module layer, basic algorithm assembly, geographical resource file layers, operating system layer respectively.
As a preferred embodiment of the present invention, described data, services middleware layer comprises engineering management module, geodata administration module, video data administration module; Described geodata administration module, video data administration module connect the engineering management module.
As a preferred embodiment of the present invention, the interface of described application layer and data, services middleware layer is the member variable and the member function of class and class in the class libraries.
As a preferred embodiment of the present invention, described data, services middleware layer is the external main interface of whole class libraries, and application layer uses whole class libraries by this interface.
As a preferred embodiment of the present invention, described data engine layer comprises data management module, carries out engine modules, network data analysis engine modules, index file record management module, cache management module and memory management module;
Described data management module connects carries out engine modules, network data analysis engine modules;
Described execution engine modules, network data analysis engine modules connect index file record management module;
Described execution engine modules, network data analysis engine modules, index file record management module connect the cache management module;
Described cache management module connects memory management module.
As a preferred embodiment of the present invention, described data engine layer adopts standard C ++ encode, based on MobileMap Embedded GIS file layout; If the file of bottom is shapefile file layout, tab file layout, then the data engine layer is replaced with data engine corresponding to the corresponding document form.
As a preferred embodiment of the present invention, described platform correlation module layer and data engine layer wait by function call and data structure use and carry out alternately.
As a preferred embodiment of the present invention, described geodata administration module is a data warehouse, and this data warehouse comprises the plurality of data storehouse, and each database comprises some entity setses, and each entity sets comprises some entities.
As a preferred embodiment of the present invention, described entity sets comprises simple entity set, solid polymer composite set, complicated entity sets.
Beneficial effect of the present invention is: trans-platform embedded geographical information systems of the present invention is by the different data engine layer of use, the Embedded GIS data resource of integrated multiple isomery simultaneously; Simultaneously, by replacing different platform correlation module layers, trans-platform embedded geographical information systems of the present invention can run directly on the multiple embedded OS without modification.
Description of drawings
Fig. 1 is the composition synoptic diagram of trans-platform embedded geographical information systems of the present invention.
Fig. 2 is the composition synoptic diagram of trans-platform embedded geographical information systems of the present invention.
Fig. 3 is the composition synoptic diagram of each intermodule of data, services middleware layer.
Fig. 4 is the composition synoptic diagram of geodata administration module.
Fig. 5 is the connection diagram of geodata administration module and view.
Fig. 6 is the composition synoptic diagram of Spatial Data Engine layer.
Embodiment
Describe the preferred embodiments of the present invention in detail below in conjunction with accompanying drawing.
See also Fig. 1, the present invention has disclosed a kind of trans-platform embedded geographical information systems, comprises application layer 1, data, services middleware layer 2, data engine layer 3, platform correlation module layer 4, basic algorithm assembly 5, geographical resource file layers 6, operating system layer 7.Described system also comprises a class libraries (trans-platform embedded GIS MFC), and this class libraries is the relevant information of definition application layer 1, data, services middleware layer 2, data engine layer 3, platform correlation module layer 4, basic algorithm assembly 5, geographical resource file layers 6, operating system layer 7 respectively.
Data, services middleware layer 2 connects described application layer, as shown in Figure 3, data, services middleware layer 2 comprises engineering management module 21, geodata administration module 22, video data administration module 23, and described geodata administration module 22, video data administration module 23 connect engineering management module 21.This data, services middleware layer 2 is used for the realization details of application programs layer shielding bottom, and the access interface of geodata and video data is provided to the upper strata by geodata administration module 22 and video data administration module 23.The interface of described application layer 1 and data, services middleware layer 2 is member variable and member functions of class and class in the class libraries.Described data, services middleware layer 2 is the external main interfaces of whole class libraries, and application layer 1 uses whole class libraries by this interface.
Data engine layer 3 connects described data, services middleware layer 2.See also Fig. 6, data engine layer 3 comprises data management module 31, carries out engine modules 32, network data analysis engine modules 33, index file record management module 34, cache management module 35 and memory management module 36.Described data management module 31 connects carries out engine modules 32, network data analysis engine modules 33; Described execution engine modules 32, network data analysis engine modules 33 connect index file record management module 34; Described execution engine modules 32, network data analysis engine modules 33, index file record management module 34 connect cache management module 35; Described cache management module 35 connects memory management module 36.Described data engine layer 3 adopts standard C ++ encodes, based on MobileMap Embedded GIS file layout; If the file of bottom is shapefile file layout, tab file layout, then data engine layer 3 is replaced with data engine corresponding to the corresponding document form.
As shown in Figure 4, described geodata administration module 31 is a data warehouse, and this data warehouse comprises the plurality of data storehouse, and each database comprises some entity setses, and each entity sets comprises some entities.Described entity sets comprises simple entity set, solid polymer composite set, complicated entity sets.
The demonstration of bottom geodata is controlled with view.View is in charge of wherein all figure layers, has also stored the common indicating characteristic of All Layers in a view simultaneously, such as the central point of map, engineer's scale, the anglec of rotation, map Show Options etc.The pairing display message of each entity sets is stored and managed to the figure layer.Its effect is the display styles of an entity sets of control, such as: but displaying ratio, display mode, can receive operation or the like.Entity set adds that its distinctive display properties promptly is the figure layer.Relation between entity sets, database, figure layer and the view as shown in Figure 5.
Platform correlation module layer 4 connects described data engine layer 3, and all operations relevant with specific operation system concentrated in together.Platform correlation module layer 4 and data engine layer 3 wait by function call and data structure use and carry out alternately.
Basic algorithm assembly 5 connects described data engine layer 3, and this basic algorithm assembly 5 comprises the GIS algorithm and the data structure of the required use of described Geographic Information System.
Geographical resource file layers 6 connects described data engine layer 3 and platform correlation module layer 4, is used to provide the information of geographical resource.Operating system layer 7 connects described geographical resource file layers 5, and this operating system layer comprises some embedded platforms; As Windows, built-in Linux.
By using different data engine layers, this system is the Embedded GIS data resource of integrated multiple isomery simultaneously; Simultaneously, by replacing different platform correlation module layers, this system can run directly on the multiple embedded OS without modification.
The role of trans-platform embedded GIS MFC in GIS uses as shown in Figure 2.
As can be seen from the figure, total system can be divided into running background at server program on the grid platform and front stage operation the client-side program on embedded mobile terminal.Embedded mobile terminal sends services request by the operation service interface of Embedded GIS application program to the backstage thereon, and by the scheduling of grid middleware and the calculating of a high-performance calculation group of planes, the result will return end application.Interactive information between terminal and the backstage comprises: the request of the request of the request of real-time road and response, geodata and response, all kinds of point of interest dynamic situations and response etc.As its name suggests, this Embedded GIS MFC is issued with the form of class libraries, between Embedded GIS application program and various GIS resource file, play the effect of forming a connecting link:, realize required function by class relevant in use, succession, the heavily loaded class libraries for application program.Class libraries is the complicated realization details of upper level applications shielding and the file system of bottom, makes the upper level applications developer can develop GIS function commonly used at short notice.Simultaneously, by inheriting and heavy duty, can also carry out the customization and the change of function; On the other hand, the GIS resource file that project is used has multiple, for example the shapefile of the tab of Mapinfo company, ESRI company etc.In addition, the terminal kind of use also has several, comprises mobile phone, PDA, car-mounted terminal, and the operating system of operation has WindowsCE, Smartphone, built-in Linux.If according to different file layouts, the different different application systems of embedded platform exploitation, cost will be huge and wherein comprise a large amount of duplication of labour.One of target of this class libraries design is exactly to support primary development, cross-platform use.Has integrated multiple file format, the function of multiple operating system.
The design concept of trans-platform embedded GIS MFC is as follows in the native system:
(1) hierarchical design.Class libraries further is divided into three layers, and the bottom details will further encapsulate the back so that cross-platform from now on replacement.The upper layer data service middleware provides interface to application program, should be clear, clear and definite, be easy to use.Intermediate data engine one deck operation file, realization core algorithm.Should replace corresponding data engine at different file layouts.Underlying platform correlation module layer, the integrated platform associative operation also should carry out corresponding replacement according to different operating system.
(2) modular design.Since class libraries is as the development platform of Embedded GIS, the service that is provided is exactly secondary development thereon.Modular design to from now on maintenance, use and customize significant.On the basis of layering, the author divides each layer into module one by one again.For example, the data, services middleware layer further is divided into engineering management module, geodata administration module and video data administration module.These modules also will further be divided into a series of objects such as data warehouse, database, entity, geographical attribute, view, figure layer, display properties.
(3) platform-neutral design.Here the cross-platform of indication comprises: support several operation systems, integrated several data source, do not rely on three aspects of any data engine.The means that the author adopts are: the first, all parts of class libraries adopt standard C ++ and encode, do not rely on any non-standard function or tripartite class libraries (MFC etc.).The second, adopt hierarchical design, by replacing minimum code to get maximum reusability in return.Three, new Embedded GIS resource file form of definition and the irrelevant data engine of implementation platform thereon.Four, add platform correlation module layer, manage few platform correlation module concentratedly.
(4) extensibility design.Obviously, any class libraries can not comprise all functions of user's needs, and the original intention of class libraries design neither attempt to reach this target.In design,, many interfaces have been reserved as much as possible in order to support user's secondary development.The user can use and customize relevant class by inheriting with heavy duty, to satisfy the different demands of different application.
(5) dynamic design.Static generalized information system can not satisfy the growing demand of people, and the development of wireless network also makes terminal, backstage interaction become possibility.The design makes network SOCKET also can become one of Data Source by using isomery multi-data source integrated technology.Such as, on portable terminal, do not need to store any map resource, when browsing, dynamically request of data is proposed to background server according to the scope in zone and the size of engineer's scale.On the other hand, portable terminal can also dynamically be asked the attribute information of being correlated with, such as, the vacant parking stall quantity in a certain parking lot, congestion situation of road or the like.All everything all carried out under the unwitting situation of upper-layer user, that is to say, by laminated shield, the upper-layer user does not know that employed data are from this locality or backstage.This provides convenience also for the developer of application program.
In the present embodiment, a cross-platform embedded Spatial Data Engine has been proposed, with its called after MobileMap.The MobileMap data engine is the embedded data engine of a spatial data, non-space data mixing.It takies, and resource is few, efficient is high, and tight with the combination of class libraries data, services middleware.Simultaneously, this engine does not rely on any other data engine and database technology, can be general on a plurality of platforms.
As shown in Figure 6, data management module is exactly the data, services middleware that the front is introduced, and comprises geodata administration module and video data administration module.This module is responsible for opening, closing database (database manipulation); Inquire about, increase, delete and revise data (data manipulation); Definition of property index (data definition) or the like in the definition of entity sets, the entity sets.Next, will control according to the difference of request and give execution engine (data access operation) and network data analysis engine (path analysis operation) respectively.These two engines select a kind of the best way to carry out according to index, ordering situation, generate " physics execution formation ".(such as: if there is an attribute to have index, then in inquiry, can adopt the method for search index).
Carry out " the physics execution formation " that produces above then.When the needs service data, then file a request, and obtain corresponding data to lower module.At this, add one deck cushion and avoided same dish piece to be repeated visit at short notice.
In conjunction with the characteristics of embedded device shortage of resources, the imagination that the design has proposed a kind of " spatial data, non-space data, management data storage and uniform and management ".With " table " notion commonly used in the database is tie, and the data that all bottoms need be stored and manage combine.Generally speaking, the thinking of data management is among the design: come management geographical with table; Come admin table information with table.All all use SQL statement to realize to the access and the management of data.As a rule, spatial data and non-space data separately manage, and this is because spatial data is essentially different (for example different SQL statement, different Index Algorithm etc.) with the non-space processing method of data.But on the storage aspect, the non-space attribute data can be stored with the mode of bivariate table, corresponding to fixed-length field wherein.For convenience's sake, space vector data also can be stored in fact in the same way, in realization it can be counted as be non-fixed-length field.The non-fixed-length field of spatial data being regarded as bivariate table has made things convenient for data management, greatly reduces the complexity of realization.In addition, the metadata of all tables of data is carried out the characteristic that unified management also is the design's data management by system's table.In general, numerous fields itself also have a lot of attributes and need manage in the bivariate table, for example: the length of the name of field, the type of field, field etc.The design reaches to show the purpose of pipe table by the drawing-in system table.
For the organizational form of file, the All Files of a database correspondence will be placed in the file, the name of file called after database.Always have two system's tables: Database Systems table and sets of fields system table, respectively corresponding two files: " database name .DBM " and " database name .FSM ".All entity setses in the Database Systems table management current database; Field system table is then managed all field informations in all entity setses.Each entity sets all has a table (list file) corresponding with it, is placed under the same file called after " entity sets name .DBF ".Vector data in the entity sets also need leave in separately in " entity sets name _ field name .OBJ " by name file.Field name wherein is corresponding to certain variable-length field in the entity sets table.
In sum, the present invention has following beneficial effect:
(1) professional platform independence.This system comprises a cross-platform Embedded GIS MFC, can be transplanted to easily on a plurality of embedded platforms based on the application system of its exploitation.
(2) extendability.This system is a hierarchical design, and the boundary between the module is clear, and interface is clear and definite.When design, specially reserved interface for user's secondary development from now on.Based on this class libraries, the user can customize and expand the Embedded GIS application program of oneself quickly and efficiently.
(3) integration.Based on native system, by same interface, user's system is the GIS data resource of integrated multiple isomery simultaneously, even can be a SOCKET resource on the network.
(4) dynamic.Dynamic is mainly reflected in the dynamic acquisition of map vector data and attribute data.
Above embodiment is the unrestricted technical scheme of the present invention in order to explanation only.Any modification or partial replacement that does not break away from spirit and scope of the invention all should be encompassed in the middle of the claim scope of the present invention.
Claims (10)
1, a kind of trans-platform embedded geographical information systems is characterized in that, this system comprises:
Application layer, be used to carry out map basic operation, inquire about all kinds of geography information, path analysis and data acquisition; And
The data, services middleware layer, connect described application layer, comprise engineering management module, geodata administration module, video data administration module, this data, services middleware layer is used for the realization details of application programs layer shielding bottom, and the access interface of geodata and video data is provided to the upper strata by geodata administration module and video data administration module; And
The data engine layer connects described data, services middleware layer; And
Platform correlation module layer connects described data engine layer, and all operations relevant with specific operation system concentrated in together; And
The basic algorithm assembly connects described data engine layer, and this basic algorithm assembly comprises the GIS algorithm and the data structure of the required use of described Geographic Information System; And
The geographical resource file layers connects described data engine layer and platform correlation module layer, is used to provide the information of geographical resource; And
Operating system layer connects described geographical resource file layers, and this operating system layer comprises some embedded platforms.
2, embedded geographical information systems according to claim 1, it is characterized in that: described system also comprises a class libraries, and this class libraries is the relevant information of definition application layer, data, services middleware layer, data engine layer, platform correlation module layer, basic algorithm assembly, geographical resource file layers, operating system layer respectively.
3, embedded geographical information systems according to claim 1 is characterized in that: described data, services middleware layer comprises engineering management module, geodata administration module, video data administration module; Described geodata administration module, video data administration module connect the engineering management module.
4, embedded geographical information systems according to claim 2 is characterized in that: the interface of described application layer and data, services middleware layer is the member variable and the member function of class and class in the class libraries.
5, embedded geographical information systems according to claim 2 is characterized in that: described data, services middleware layer is the external main interface of whole class libraries, and application layer uses whole class libraries by this interface.
6, embedded geographical information systems according to claim 1 is characterized in that: described data engine layer comprises data management module, carries out engine modules, network data analysis engine modules, index file record management module, cache management module and memory management module;
Described data management module connects carries out engine modules, network data analysis engine modules;
Described execution engine modules, network data analysis engine modules connect index file record management module;
Described execution engine modules, network data analysis engine modules, index file record management module connect the cache management module;
Described cache management module connects memory management module.
7, embedded geographical information systems according to claim 1 is characterized in that: described data engine layer adopts standard C ++ encode, based on MobileMap Embedded GIS file layout; If the file of bottom is shapefile file layout, tab file layout, then the data engine layer is replaced with data engine corresponding to the corresponding document form.
8, embedded geographical information systems according to claim 1 is characterized in that: described platform correlation module layer and data engine layer make by function call and data structure and are used for carrying out alternately.
9, embedded geographical information systems according to claim 1, it is characterized in that: described geodata administration module is a data warehouse, this data warehouse comprises the plurality of data storehouse, and each database comprises some entity setses, and each entity sets comprises some entities.
10, embedded geographical information systems according to claim 9 is characterized in that: described entity sets comprises simple entity set, solid polymer composite set, complicated entity sets.
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| CN102004748A (en) * | 2010-04-29 | 2011-04-06 | 上海海洋大学 | Heterogeneous geographic data query system and method |
| CN102236555A (en) * | 2011-07-29 | 2011-11-09 | 北京世纪高通科技有限公司 | Traffic information display method and system |
| CN101753627B (en) * | 2009-12-17 | 2012-09-05 | 武汉中地数码科技有限公司 | Application domain resource management method based on grid GIS |
| CN104298496A (en) * | 2013-07-19 | 2015-01-21 | 上海宝信软件股份有限公司 | Data-analysis-based software development framework system |
| CN105183491A (en) * | 2015-10-21 | 2015-12-23 | 北京超图软件股份有限公司 | Cross-platform desktop GIS and starting method thereof |
| CN105404825A (en) * | 2015-11-27 | 2016-03-16 | 陕西天润科技股份有限公司 | Geographic information data spatial expansion and encryption method for mobile end database |
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| CN105608211A (en) * | 2015-12-30 | 2016-05-25 | 北京超图软件股份有限公司 | GIS system based on ARM architecture |
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| CN102004748A (en) * | 2010-04-29 | 2011-04-06 | 上海海洋大学 | Heterogeneous geographic data query system and method |
| CN102236555A (en) * | 2011-07-29 | 2011-11-09 | 北京世纪高通科技有限公司 | Traffic information display method and system |
| CN102236555B (en) * | 2011-07-29 | 2013-12-18 | 北京世纪高通科技有限公司 | Traffic information display method and system |
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| CN104298496B (en) * | 2013-07-19 | 2017-06-23 | 上海宝信软件股份有限公司 | data analysis type software development framework system |
| CN105512154A (en) * | 2014-10-20 | 2016-04-20 | 国家电网公司 | Method and system for environmental-protection data collection based on embedded database |
| CN105183491A (en) * | 2015-10-21 | 2015-12-23 | 北京超图软件股份有限公司 | Cross-platform desktop GIS and starting method thereof |
| CN105404825B (en) * | 2015-11-27 | 2017-12-29 | 陕西天润科技股份有限公司 | The geographic information data Space Expanding and encryption method of a kind of mobile client database |
| CN105404825A (en) * | 2015-11-27 | 2016-03-16 | 陕西天润科技股份有限公司 | Geographic information data spatial expansion and encryption method for mobile end database |
| CN105608211A (en) * | 2015-12-30 | 2016-05-25 | 北京超图软件股份有限公司 | GIS system based on ARM architecture |
| CN105608211B (en) * | 2015-12-30 | 2019-02-22 | 北京超图软件股份有限公司 | A kind of generalized information system based on ARM framework |
| CN107480235A (en) * | 2017-08-08 | 2017-12-15 | 四川长虹电器股份有限公司 | A kind of database framework of data platform |
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