2006 Vol. 31, No. 5
Display Method:
2006, 31(5): 585-589.
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Abstract:
Web service-based approach for spatial information system can improve the extensibility and interoperability. In this paper, a service-oriented distributed spatial model is discussed; within the model framework, a web service-based architecture is presented. An approach of integrating web service and spatial information system is proposed. An architecture of a web service-based grid supporting system is introduced, which gives a new approach to web service based spatial information system architecture.
Web service-based approach for spatial information system can improve the extensibility and interoperability. In this paper, a service-oriented distributed spatial model is discussed; within the model framework, a web service-based architecture is presented. An approach of integrating web service and spatial information system is proposed. An architecture of a web service-based grid supporting system is introduced, which gives a new approach to web service based spatial information system architecture.
2006, 31(5): 590-594.
Abstract:
The topology relationship of spatial entities is the basis of GIS applications in spatial analysis and decision support. The crucial point of topology relationships is the building of topological structure. This paper firstly introduces the point set of topology theory, enumerating all kinds of topology relations which have practical application value. The relationship between a base topology element and spatial entity in the topology model is also analyzed.Then a topology building method is put forward, using feature classes. The algorithms accompany with the spatial entity model of MAPGIS7.0. These algorithms mainly present the idea of feature splitting. These methods are proved effective for building topological relationships of spatial entities in practice.
The topology relationship of spatial entities is the basis of GIS applications in spatial analysis and decision support. The crucial point of topology relationships is the building of topological structure. This paper firstly introduces the point set of topology theory, enumerating all kinds of topology relations which have practical application value. The relationship between a base topology element and spatial entity in the topology model is also analyzed.Then a topology building method is put forward, using feature classes. The algorithms accompany with the spatial entity model of MAPGIS7.0. These algorithms mainly present the idea of feature splitting. These methods are proved effective for building topological relationships of spatial entities in practice.
2006, 31(5): 595-599.
Abstract:
The spatial data model is basic to the research of GIS. New generation large-scale GIS has high levels of data, complex topology relations and many data categories. In order to meet these requirements, we propose a new kind of GIS data model: the orient-entity spatial data model. An entity is the basic, representative object in this model. The advantages are a strong ability for representation and semantics, expression and transformation of semantics, and realization with ease. This paper introduces the data model from the sides of the spatial data management and the concept data model. A system with this model can strengthen its ability of representation to real world objects, and rationalizing data organization.
The spatial data model is basic to the research of GIS. New generation large-scale GIS has high levels of data, complex topology relations and many data categories. In order to meet these requirements, we propose a new kind of GIS data model: the orient-entity spatial data model. An entity is the basic, representative object in this model. The advantages are a strong ability for representation and semantics, expression and transformation of semantics, and realization with ease. This paper introduces the data model from the sides of the spatial data management and the concept data model. A system with this model can strengthen its ability of representation to real world objects, and rationalizing data organization.
2006, 31(5): 600-604.
Abstract:
This paper presents a "versioned" managing mode to manage the geological database, and a model of version management based on DBMS. The design process and architecture are discussed, as well as the main arithmetic and technologies of version realization in MAPGIS 7.0. It solves the concurrency control problem of long-duration transaction which cannot be solved by traditional GIS software. Test shows that in actual application, users can do cooperative editing for a long term with MAPGIS7.0. Now it has been successfully applied to the national geological survey spatial database management system.
This paper presents a "versioned" managing mode to manage the geological database, and a model of version management based on DBMS. The design process and architecture are discussed, as well as the main arithmetic and technologies of version realization in MAPGIS 7.0. It solves the concurrency control problem of long-duration transaction which cannot be solved by traditional GIS software. Test shows that in actual application, users can do cooperative editing for a long term with MAPGIS7.0. Now it has been successfully applied to the national geological survey spatial database management system.
2006, 31(5): 605-608.
Abstract:
This paper offers a solution to the application of a GIS system based on relational database management system (RDBMS) in a given circumstance which requires a long transaction. The traditional method to long transaction is to add locks on data in order to let someone edit it exclusively. That is to say, data can not be edited by more than one person at the same time with the traditional method. The paper starts from the requirement from GIS to long transaction and the questions which went on when people deal the long transaction with the traditional method. A feasible solution is offered which treats a data change as a statement and mark changes in data by state ids, then uses two algorithms to control the statements. With this solution not only data can be edited by few persons synchronously but also the different changes made by different people can be saved respectively.
This paper offers a solution to the application of a GIS system based on relational database management system (RDBMS) in a given circumstance which requires a long transaction. The traditional method to long transaction is to add locks on data in order to let someone edit it exclusively. That is to say, data can not be edited by more than one person at the same time with the traditional method. The paper starts from the requirement from GIS to long transaction and the questions which went on when people deal the long transaction with the traditional method. A feasible solution is offered which treats a data change as a statement and mark changes in data by state ids, then uses two algorithms to control the statements. With this solution not only data can be edited by few persons synchronously but also the different changes made by different people can be saved respectively.
2006, 31(5): 609-614.
Abstract:
Traditional GIS software faces some hot potato, for example, industrilization, specialization and high cost.In order to popularize GIS software, and reduce its cost, construct a plugin-based GIS application framework, which not only provides a nice reusable and flexible develop environment, but also supports special application fields faced developers when they put in practice some application project. After dissecting the essential and implementation mechanism of platform & plugin model, we present the object model, message mechanism and hierarchy of a plugin-based GIS application framework model, and apply this theory into the development and practice of large-scale GIS platform (MAPGIS7.0), which significantly promotes the extension platform function and GIS application.
Traditional GIS software faces some hot potato, for example, industrilization, specialization and high cost.In order to popularize GIS software, and reduce its cost, construct a plugin-based GIS application framework, which not only provides a nice reusable and flexible develop environment, but also supports special application fields faced developers when they put in practice some application project. After dissecting the essential and implementation mechanism of platform & plugin model, we present the object model, message mechanism and hierarchy of a plugin-based GIS application framework model, and apply this theory into the development and practice of large-scale GIS platform (MAPGIS7.0), which significantly promotes the extension platform function and GIS application.
2006, 31(5): 615-618.
Abstract:
Lidar can capture 3D geographical information quickly, and form a massive discrete point cloud.There are some shortcomings in the existing classification algorithms, such as low precision of classification and slow processing speed, especially in processing buildings close to trees. In this article, a new building extraction algorithm is introduced. The range image is abstracted from the original data and then the height texture is used for assisting classification. The authors tested the algorithm with Lidar data. The result of the experiment shows that this algorithm can distinguish adjacent buildings and trees. Also, the algorithm is good at classification precision and high speed. It has obvious advantages in the urban Lidar points cloud classification.
Lidar can capture 3D geographical information quickly, and form a massive discrete point cloud.There are some shortcomings in the existing classification algorithms, such as low precision of classification and slow processing speed, especially in processing buildings close to trees. In this article, a new building extraction algorithm is introduced. The range image is abstracted from the original data and then the height texture is used for assisting classification. The authors tested the algorithm with Lidar data. The result of the experiment shows that this algorithm can distinguish adjacent buildings and trees. Also, the algorithm is good at classification precision and high speed. It has obvious advantages in the urban Lidar points cloud classification.
2006, 31(5): 619-623.
Abstract:
The partition algorithms between triangulated irregular network are key algorithms for building and analyzing 3D geology models. Their efficiency determines the model building efficiency. To improve the algorithm, this paper first realizes collision detection by building OBB (oriented-bounding box) trees, and then calculates the intersection points of cutting triangle pairs. Through normalizing the vertex coordinates, the algorithm provides a method for the rapid reconstruction of the geology model. The algorithm uses different partition methods based on different partition types. This paper gives a detailed description of the algorithm's process and demonstrates a cut effect of triangulated irregular network.
The partition algorithms between triangulated irregular network are key algorithms for building and analyzing 3D geology models. Their efficiency determines the model building efficiency. To improve the algorithm, this paper first realizes collision detection by building OBB (oriented-bounding box) trees, and then calculates the intersection points of cutting triangle pairs. Through normalizing the vertex coordinates, the algorithm provides a method for the rapid reconstruction of the geology model. The algorithm uses different partition methods based on different partition types. This paper gives a detailed description of the algorithm's process and demonstrates a cut effect of triangulated irregular network.
2006, 31(5): 624-630.
Abstract:
The spatial data is the important base of land resource management, but for long time, it cannot be updated and synchronized, lack of valid spatial data, so each level of government can only work at low efficiency mode. Through analyzing the national territory resources data and central data construction at present, this paper proposes a tree structure presenting the deployment, system and exchange models in central data. Data renewal and synchronization are considered through realizing a design of data renewal and a transmission through a sub-module. The entire discussion process has realized a somerism distributional data center. At the same time, we also propose the concept of table renewal at document level and geography entity renewal at record level, which has unique code.
The spatial data is the important base of land resource management, but for long time, it cannot be updated and synchronized, lack of valid spatial data, so each level of government can only work at low efficiency mode. Through analyzing the national territory resources data and central data construction at present, this paper proposes a tree structure presenting the deployment, system and exchange models in central data. Data renewal and synchronization are considered through realizing a design of data renewal and a transmission through a sub-module. The entire discussion process has realized a somerism distributional data center. At the same time, we also propose the concept of table renewal at document level and geography entity renewal at record level, which has unique code.
2006, 31(5): 631-634.
Abstract:
This project is researching and developing key technologies of compression and search for mass space information under the condition of very limited resources available, which is quite common in embedded environment. It also aims to develop the technologies for intercommunication between the embedded GIS system and the Web GIS system. This embedded GIS system comprehensively uses component, mid-ware, embedded OS and network communication technologies, realizing the interfaces of visualizing, managing, querying and analyzing of space information.
This project is researching and developing key technologies of compression and search for mass space information under the condition of very limited resources available, which is quite common in embedded environment. It also aims to develop the technologies for intercommunication between the embedded GIS system and the Web GIS system. This embedded GIS system comprehensively uses component, mid-ware, embedded OS and network communication technologies, realizing the interfaces of visualizing, managing, querying and analyzing of space information.
2006, 31(5): 635-638.
Abstract:
The network has become more and more important in the construction of urban GIS, meanwhile the use of information resources has changed from closed mode to open mode accordingly. Using grid computing, spatial metadate, OGSA (open grid service architecture) and interoperability, we designed a general structure for urban spatial data sharing. The structure is based on Wrapper/Mediator method and can resolve the interoperability problem of multi-source sysem. As a result, the theory can be uesd to guide the urban GIS construction for data sharing.
The network has become more and more important in the construction of urban GIS, meanwhile the use of information resources has changed from closed mode to open mode accordingly. Using grid computing, spatial metadate, OGSA (open grid service architecture) and interoperability, we designed a general structure for urban spatial data sharing. The structure is based on Wrapper/Mediator method and can resolve the interoperability problem of multi-source sysem. As a result, the theory can be uesd to guide the urban GIS construction for data sharing.
2006, 31(5): 639-644.
Abstract:
WFS (web feature services) is an important part of spatial data interoperability, providing feature-level operations for different GIS data formats. WFS, based on GML (geography markup language), is able to briefly and effectively support the interfaces of essential data access, feature edition including feature adding, feature deleting and feature updating, and combinational searching of features. Through researching the normal specifications of OGC (open GIS consortium Inc.), using the basic MAPGIS platform and editing environment of.Net, the authors create a WFS, which uses the XML transport and storage of geographic information including both properties and geometry of geograpy. Finally this paper puts forward a set of WFS architecture and implementation methods based on GML, running on the MAPGIS platform. WFS implements part of the function of spatial data interoperability. WCS and WCTS are absolutely necessary in order to be good to spatial data interoperability.
WFS (web feature services) is an important part of spatial data interoperability, providing feature-level operations for different GIS data formats. WFS, based on GML (geography markup language), is able to briefly and effectively support the interfaces of essential data access, feature edition including feature adding, feature deleting and feature updating, and combinational searching of features. Through researching the normal specifications of OGC (open GIS consortium Inc.), using the basic MAPGIS platform and editing environment of.Net, the authors create a WFS, which uses the XML transport and storage of geographic information including both properties and geometry of geograpy. Finally this paper puts forward a set of WFS architecture and implementation methods based on GML, running on the MAPGIS platform. WFS implements part of the function of spatial data interoperability. WCS and WCTS are absolutely necessary in order to be good to spatial data interoperability.
2006, 31(5): 645-648.
Abstract:
Bringing the service grid into the geological survey spatial data service area can greatly improve the processing speed of geological data, and can solve cooperation issues in isomerous environment and the data sharing problem on wide area network (WAN). This paper discusses the issues of data storage, organizing and sharing on spatial data service in geology survey, proposes the technology frame for applying the grid technology to geological survey spatial data, this frame based on on concepts and technologies from the grid and web service communities, the frame defines network resource layer, network service layer and application layer. Service oriented and extendable are the characteristics of the frame. Based on web services description language (WSDL) and SOAP+HTTP protocol, it has built an architecture which is fit for the geological spatial data grid, and implemented the geological survey spatial data service application system. The results show that applying grid technology to geological spatial data service area is possible. It provides advanced resource sharing mode from the aspect of data sharing and computes resource interoperation on the network.
Bringing the service grid into the geological survey spatial data service area can greatly improve the processing speed of geological data, and can solve cooperation issues in isomerous environment and the data sharing problem on wide area network (WAN). This paper discusses the issues of data storage, organizing and sharing on spatial data service in geology survey, proposes the technology frame for applying the grid technology to geological survey spatial data, this frame based on on concepts and technologies from the grid and web service communities, the frame defines network resource layer, network service layer and application layer. Service oriented and extendable are the characteristics of the frame. Based on web services description language (WSDL) and SOAP+HTTP protocol, it has built an architecture which is fit for the geological spatial data grid, and implemented the geological survey spatial data service application system. The results show that applying grid technology to geological spatial data service area is possible. It provides advanced resource sharing mode from the aspect of data sharing and computes resource interoperation on the network.
2006, 31(5): 649-652.
Abstract:
An approach to geo-spatial information systems considers how to improve expansibility and interoperability, which has become increasingly relevant in this research field.This paper firstly looks at the ISO/OGC rules and standards of geospatial sharing, and then constructs an SOA (service-oriented architecture) geo-spatial integration module.Based on the module, researches the uniform architecture of geo-spatial interoperability and services; forms independent of software and the expression pattern of suit the geological spatial information interoperability.The purpose is to provide a data description mechanism for use in an isomerous and distributing system, making it possible to apply and manage geological spatial data.This paper presents geo-spatial information exchange architecture using the GML (geography markup language) model, aiming at geoscience application demand.The pattern of specialty data is put forward providing a feasible way to ensure geological spatial information interoperability.
An approach to geo-spatial information systems considers how to improve expansibility and interoperability, which has become increasingly relevant in this research field.This paper firstly looks at the ISO/OGC rules and standards of geospatial sharing, and then constructs an SOA (service-oriented architecture) geo-spatial integration module.Based on the module, researches the uniform architecture of geo-spatial interoperability and services; forms independent of software and the expression pattern of suit the geological spatial information interoperability.The purpose is to provide a data description mechanism for use in an isomerous and distributing system, making it possible to apply and manage geological spatial data.This paper presents geo-spatial information exchange architecture using the GML (geography markup language) model, aiming at geoscience application demand.The pattern of specialty data is put forward providing a feasible way to ensure geological spatial information interoperability.
2006, 31(5): 653-658.
Abstract:
Mobile terminals with embedded-GIS are constrained by limited resources.Proper strategies are required to solve problems such as limited memory conflicting with large quantities of data and the requirement of real-time processing.This paper firstly analyzes the characteristics of mobile terminals and GIS spatial data, such as the efficiency of mobile terminals and the complexity of spatial data.Then classifies the embedded-GIS applications into three types according to its different themes: electronic-map, navigation system and field data collection.Finally it describes the integration of existing index algorithms (packed R-tree, Quad-tree and Buddy-tree), and advances the application theme-oriented index strategy.The practice proves that this strategy takes advantage of these algorithms and overcomes its shortcoming to improve the efficiency of data access, memory utility and CPU performance.
Mobile terminals with embedded-GIS are constrained by limited resources.Proper strategies are required to solve problems such as limited memory conflicting with large quantities of data and the requirement of real-time processing.This paper firstly analyzes the characteristics of mobile terminals and GIS spatial data, such as the efficiency of mobile terminals and the complexity of spatial data.Then classifies the embedded-GIS applications into three types according to its different themes: electronic-map, navigation system and field data collection.Finally it describes the integration of existing index algorithms (packed R-tree, Quad-tree and Buddy-tree), and advances the application theme-oriented index strategy.The practice proves that this strategy takes advantage of these algorithms and overcomes its shortcoming to improve the efficiency of data access, memory utility and CPU performance.
2006, 31(5): 659-662.
Abstract:
The main purpose of this study is to solve the problem of data sharing and consistent maintenance in distributed geological spatial database.Based upon the spatial data model of MAPGIS7.0 and the characteristics of data distribution, this paper designs a distributed multi-level server network architecture called "grid horizontal and multi-levels vertical".Under the architecture, a data exchange strategy is presented which regards geological feature class as elementary unit and it is service-oriented.The application of the strategy to nation's geological spatial database system demonstrates that: the spatial, topological and semantic consistence can be maintained effectively by means of exchanging data with geological feature class, and service-oriented operation can deal with data exchange between different operating systems and databases.In conclusion this strategy is suitable for the integrated management of a distributed heterogeneous geological spatial database.
The main purpose of this study is to solve the problem of data sharing and consistent maintenance in distributed geological spatial database.Based upon the spatial data model of MAPGIS7.0 and the characteristics of data distribution, this paper designs a distributed multi-level server network architecture called "grid horizontal and multi-levels vertical".Under the architecture, a data exchange strategy is presented which regards geological feature class as elementary unit and it is service-oriented.The application of the strategy to nation's geological spatial database system demonstrates that: the spatial, topological and semantic consistence can be maintained effectively by means of exchanging data with geological feature class, and service-oriented operation can deal with data exchange between different operating systems and databases.In conclusion this strategy is suitable for the integrated management of a distributed heterogeneous geological spatial database.
2006, 31(5): 663-667.
Abstract:
In order to support the data requirement for city development, this paper presents methods to build a framework for 3D urban geophysical data management and service system (3D UGDMSS), including database and information management, integrated processing and display of multi-methods, 3D visualization of interpretation data and production broadcasting. The database and information management is the base of the system, and offers all data for other levels. The second level based on 2D GIS exists as a tool for data display and interaction for multi-methods integrative processing, and establishes a foundation for production. Levels three and four carry on the work of displaying the production information from urban geophysical data. The third level is 3D visualization of the information, and the fourth promulgates the production through the internet. There are two challenges when building the 3D UGDMSS. Managing urban geophysical data from different methods synthetically is the first. In this paper, we suggest the database is formed in different layers, subjects and elements, in which the data are concretized with geophysical survey points and lines. The second challenge comes from information visualization in 3D space. The production information from urban geophysical data is transferred into geological forms shown in 3D space. A hybrid data structure model based on wire frame model designed to describe this data and the 3D modelling process is introduced. This system framework has been successfully applied in one city of North China.
In order to support the data requirement for city development, this paper presents methods to build a framework for 3D urban geophysical data management and service system (3D UGDMSS), including database and information management, integrated processing and display of multi-methods, 3D visualization of interpretation data and production broadcasting. The database and information management is the base of the system, and offers all data for other levels. The second level based on 2D GIS exists as a tool for data display and interaction for multi-methods integrative processing, and establishes a foundation for production. Levels three and four carry on the work of displaying the production information from urban geophysical data. The third level is 3D visualization of the information, and the fourth promulgates the production through the internet. There are two challenges when building the 3D UGDMSS. Managing urban geophysical data from different methods synthetically is the first. In this paper, we suggest the database is formed in different layers, subjects and elements, in which the data are concretized with geophysical survey points and lines. The second challenge comes from information visualization in 3D space. The production information from urban geophysical data is transferred into geological forms shown in 3D space. A hybrid data structure model based on wire frame model designed to describe this data and the 3D modelling process is introduced. This system framework has been successfully applied in one city of North China.
2006, 31(5): 668-672.
Abstract:
This paper presents a 3D complex geological entity modeling method based on line-frame model, designed to accurately express the spatial geometrical shape of every element of a complex geological entity and their mutual relationship. This method enables the fast construction of a fault model, stratum model, or complex geological entity model in the case of fault interleaving. Proved in modeling practice, this method is an accurate and effective method for constructing a 3D complex geological entity and it can adapt to constructing 3D geological entity model in the case of familiar complex geological conditions.
This paper presents a 3D complex geological entity modeling method based on line-frame model, designed to accurately express the spatial geometrical shape of every element of a complex geological entity and their mutual relationship. This method enables the fast construction of a fault model, stratum model, or complex geological entity model in the case of fault interleaving. Proved in modeling practice, this method is an accurate and effective method for constructing a 3D complex geological entity and it can adapt to constructing 3D geological entity model in the case of familiar complex geological conditions.
2006, 31(5): 673-677.
Abstract:
The management and service systems for urban geological information are characteristically domain specific oriented.In order to solve the reuse problem of software components, the idea of domain specific software architecture from modern software engineering was introduced in the process of the system's development. Urban geological domain specific software architecture (UG-DSSA) is presented, including heterogeneous architecture styles, whole software architecture and business flow, which are used to design the system. Using this design idea, different cities can reuse system components to a large degree, and organization and management of development are comparatively simpler. Therefore the cost of development can be cut sharply. Also the system has good expansibility. The UG-DSSA and its idea can be applied to the development of urban geological information systems or similar large scale systems.
The management and service systems for urban geological information are characteristically domain specific oriented.In order to solve the reuse problem of software components, the idea of domain specific software architecture from modern software engineering was introduced in the process of the system's development. Urban geological domain specific software architecture (UG-DSSA) is presented, including heterogeneous architecture styles, whole software architecture and business flow, which are used to design the system. Using this design idea, different cities can reuse system components to a large degree, and organization and management of development are comparatively simpler. Therefore the cost of development can be cut sharply. Also the system has good expansibility. The UG-DSSA and its idea can be applied to the development of urban geological information systems or similar large scale systems.
2006, 31(5): 678-682.
Abstract:
It is essential to manage geological data such as geophysical, geochemical, geotechnical and geographical data in urban planning, construction, environmental evaluation and public information issue. Based on an analysis of the characteristics of city geological data, such as universality, diversity, and multi-dimensionality, this paper classifies the investigations geological data, and proposes a structural data model on the basis of the survey and geodesic dots. It has many characteristics, including simplicity and easy maintenance, and it can be requeried at any level. Based on the data structure, a mixture database system structure is designed, including Client/Server structure and Browse/Server structure, which can realize the professional data processing and maintaining, information publishing and browsing, fit for constructing city 3-dimensional geological information management and service system.
It is essential to manage geological data such as geophysical, geochemical, geotechnical and geographical data in urban planning, construction, environmental evaluation and public information issue. Based on an analysis of the characteristics of city geological data, such as universality, diversity, and multi-dimensionality, this paper classifies the investigations geological data, and proposes a structural data model on the basis of the survey and geodesic dots. It has many characteristics, including simplicity and easy maintenance, and it can be requeried at any level. Based on the data structure, a mixture database system structure is designed, including Client/Server structure and Browse/Server structure, which can realize the professional data processing and maintaining, information publishing and browsing, fit for constructing city 3-dimensional geological information management and service system.
2006, 31(5): 683-687.
Abstract:
In order to elaborate the application of GIS technology in telecommunication, this article considers the present development of telecommunication and network operation management, unifies the GIS technology characteristic to elaborate the necessity and the inevitability of introducing GIS technology to the management and business of telecommunication networks.Its introduction will fundamentally change the traditional mode of telecommunication network planning, construction, and management. It will provide market analysis and forecast, network planning, engineering design, resource disposition and analysis, real-time line monitoring, emergency operation safeguards and so on.
In order to elaborate the application of GIS technology in telecommunication, this article considers the present development of telecommunication and network operation management, unifies the GIS technology characteristic to elaborate the necessity and the inevitability of introducing GIS technology to the management and business of telecommunication networks.Its introduction will fundamentally change the traditional mode of telecommunication network planning, construction, and management. It will provide market analysis and forecast, network planning, engineering design, resource disposition and analysis, real-time line monitoring, emergency operation safeguards and so on.
2006, 31(5): 688-692.
Abstract:
For the purpose of avoiding the emergence of isolated information islands and making full use of municipal information resources, this paper presents a scheme for a GIS-based dynamic integration of municipal management information. This scheme utilizes a hierarchical architecture. By selecting, filtering and synthesizing municipal information on facilities and operations, a composite municipal data warehouse is created and maintained. An integrated dynamic management mechanism for distributed municipal information ensures that the synthetic municipal data are complete and consistent with current status. Analysis and prediction can then be conducted based upon data mining techniques. Implementation of this scheme will improve the emergency handling capabilities of a city, urban planning, decision making and many aspects concerning service to society.
For the purpose of avoiding the emergence of isolated information islands and making full use of municipal information resources, this paper presents a scheme for a GIS-based dynamic integration of municipal management information. This scheme utilizes a hierarchical architecture. By selecting, filtering and synthesizing municipal information on facilities and operations, a composite municipal data warehouse is created and maintained. An integrated dynamic management mechanism for distributed municipal information ensures that the synthetic municipal data are complete and consistent with current status. Analysis and prediction can then be conducted based upon data mining techniques. Implementation of this scheme will improve the emergency handling capabilities of a city, urban planning, decision making and many aspects concerning service to society.
2006, 31(5): 693-698.
Abstract:
The application and development of the location based services (LBS) system-based wireless location technology provides a new and important method for the reasonable management of corporation personnel. In this article, a lot of mobile location technologies are discussed in detail. GPSOne has more characteristics and advantages of high location precision, high success ratio and lower cost for corporation personnel management. In order to fit the need of supervisor management in a water group, a feasibility analysis and the aims of a system foundation based on GIS and GPSOne mobile location technology are brought forward. Further, the architecture and main functions, based on WebGIS mode, as well as some characteristics of the system, are studied with example of supervisor work attendance management application in continuous active location mode. The manager of the water group can check the location of the water pipe supervisor and query work information by wap mobile phone. Finally, this article considers prospects for further development and foregrounds the possible use of LBS technology in transportation and traffic application fields.
The application and development of the location based services (LBS) system-based wireless location technology provides a new and important method for the reasonable management of corporation personnel. In this article, a lot of mobile location technologies are discussed in detail. GPSOne has more characteristics and advantages of high location precision, high success ratio and lower cost for corporation personnel management. In order to fit the need of supervisor management in a water group, a feasibility analysis and the aims of a system foundation based on GIS and GPSOne mobile location technology are brought forward. Further, the architecture and main functions, based on WebGIS mode, as well as some characteristics of the system, are studied with example of supervisor work attendance management application in continuous active location mode. The manager of the water group can check the location of the water pipe supervisor and query work information by wap mobile phone. Finally, this article considers prospects for further development and foregrounds the possible use of LBS technology in transportation and traffic application fields.
2006, 31(5): 699-703.
Abstract:
City planning management has become highly complex in recent years. GIS and database technology provide a means of improving city management systems. One method of managing the present condition and characteristics of city planning is through a spatial decision-making platform. The paper explains SDSS is spatial decision support system, and describes the SDSS data is stored in the database and connected throuth the spatial data engine (SDE). In GIS and express the result using VRML or 3D technology, and discusses the design of the spatial decision-making software platform's system structure and application model. The kernel of the platform is to build the perfect decision-model database and decision operator, expressing all kinds of the calculable results. Such a platform would provide the basis of accurate, systematic decisions by collating many strands of information for presentation to the decision maker.
City planning management has become highly complex in recent years. GIS and database technology provide a means of improving city management systems. One method of managing the present condition and characteristics of city planning is through a spatial decision-making platform. The paper explains SDSS is spatial decision support system, and describes the SDSS data is stored in the database and connected throuth the spatial data engine (SDE). In GIS and express the result using VRML or 3D technology, and discusses the design of the spatial decision-making software platform's system structure and application model. The kernel of the platform is to build the perfect decision-model database and decision operator, expressing all kinds of the calculable results. Such a platform would provide the basis of accurate, systematic decisions by collating many strands of information for presentation to the decision maker.
2006, 31(5): 704-708.
Abstract:
In order to change the traditional mode of telecommunication pipe & cable network planning, construction, and management, GIS technology is introduced into the management and business of the pipe & cable network. Taking a geographical map of a city as the background, a pipe & cable management system is set up, providing a composite application of network planning, project design, construction, operation, maintenance, statistics and asset analysis, marketing analysis, data input and output, business integration, circuit monitoring, inquiries, and so on. This paper discusses the main design principles, architecture, framework, interface, main functions and the application prospects of the system.
In order to change the traditional mode of telecommunication pipe & cable network planning, construction, and management, GIS technology is introduced into the management and business of the pipe & cable network. Taking a geographical map of a city as the background, a pipe & cable management system is set up, providing a composite application of network planning, project design, construction, operation, maintenance, statistics and asset analysis, marketing analysis, data input and output, business integration, circuit monitoring, inquiries, and so on. This paper discusses the main design principles, architecture, framework, interface, main functions and the application prospects of the system.
2006, 31(5): 709-714.
Abstract:
Engineering seismic hazard analysis for a specified site represents an essential element of seismic safety assessment, and provides engineers with the standards of protection against earthquakes.In this paper, on the basis of investigation of the several PSHA (probabilistic seismic hazard analysis) methods in China, the feasible methods and solutions of PSHA based on GIS were put forward. Through the secondary development of MAPGIS, a PSHA procedure is developed. Finally, a PSHA example in the Yangtze Gorges district has testified the feasibility of the procedure. The PSHA procedure based on MAPGIS not only provides users with interactive interface to improve maneuverability, but also mines the information of PSHA from geo-data.
Engineering seismic hazard analysis for a specified site represents an essential element of seismic safety assessment, and provides engineers with the standards of protection against earthquakes.In this paper, on the basis of investigation of the several PSHA (probabilistic seismic hazard analysis) methods in China, the feasible methods and solutions of PSHA based on GIS were put forward. Through the secondary development of MAPGIS, a PSHA procedure is developed. Finally, a PSHA example in the Yangtze Gorges district has testified the feasibility of the procedure. The PSHA procedure based on MAPGIS not only provides users with interactive interface to improve maneuverability, but also mines the information of PSHA from geo-data.
2006, 31(5): 715-718.
Abstract:
Surveying and mapping production provides base geographical information that can assist many endeavors, including the economic layout of an area, land resource surveying, farming, forest and water conservation, energy sources, traffic, city planning and construction. Thus, the production management of a surveying and mapping department is important. Production management system based on the MAPSUV digital surveying and mapping platform that is setting of relief map with project survey, with a core of kinds of grade reference point, using various GIS and database technologies, and makes use of a digital production management system that is fit for the factual needs of a production database, and enables the sharing of the database with base on surveying and mapping trade daily operation.
Surveying and mapping production provides base geographical information that can assist many endeavors, including the economic layout of an area, land resource surveying, farming, forest and water conservation, energy sources, traffic, city planning and construction. Thus, the production management of a surveying and mapping department is important. Production management system based on the MAPSUV digital surveying and mapping platform that is setting of relief map with project survey, with a core of kinds of grade reference point, using various GIS and database technologies, and makes use of a digital production management system that is fit for the factual needs of a production database, and enables the sharing of the database with base on surveying and mapping trade daily operation.
2006, 31(5): 719-724.
Abstract:
Adjusting land use planning is an important task in land management. Doing so manually provides few options for decision-making, potentially leading to poor decisions. Through using GIS technology, information management is applied in the land use planning field, providing a solution for dealing with land use planning data by making use of modern high computer storage capacity. This paper also presents a way to make and compare multi-schemas in adjusting land use planning by making use of computer data processing.We have achieved a way to dynamically manage land use planning quota by making use of a spatial database and analytical tools for quantitative analysis, improving planning quality and lessening time spent on such projects.
Adjusting land use planning is an important task in land management. Doing so manually provides few options for decision-making, potentially leading to poor decisions. Through using GIS technology, information management is applied in the land use planning field, providing a solution for dealing with land use planning data by making use of modern high computer storage capacity. This paper also presents a way to make and compare multi-schemas in adjusting land use planning by making use of computer data processing.We have achieved a way to dynamically manage land use planning quota by making use of a spatial database and analytical tools for quantitative analysis, improving planning quality and lessening time spent on such projects.
2006, 31(5): 725-728.
Abstract:
In order to meet the requirements of urban GIS applications for information query, planning, design, emergency response and society-oriented service, the authors designed and implemented a general-purpose urban GIS placename location tool. Adopting three-layer architecture, this tool consists of a placename database, a management & search engine and an interface toolbox for maintenance and query. With placenames standing for point features or rectangular regions, this placename location tool includes functions such as database setup & maintenance, placename search, quick fuzzy matching and map redirection. A placename database, which is convenient to establish and update, can not only quickly lead a UGIS user to places of interest, but also serves as a presentation of feature classes, and hence provides a data foundation for advanced query or analysis.
In order to meet the requirements of urban GIS applications for information query, planning, design, emergency response and society-oriented service, the authors designed and implemented a general-purpose urban GIS placename location tool. Adopting three-layer architecture, this tool consists of a placename database, a management & search engine and an interface toolbox for maintenance and query. With placenames standing for point features or rectangular regions, this placename location tool includes functions such as database setup & maintenance, placename search, quick fuzzy matching and map redirection. A placename database, which is convenient to establish and update, can not only quickly lead a UGIS user to places of interest, but also serves as a presentation of feature classes, and hence provides a data foundation for advanced query or analysis.
2006, 31(5): 729-732.
Abstract:
Quick response to customer needs, cost saving, and improved resource management are keys to maintaining the core competitive strength of a telecom enterprise. To show the state of resources occupied by a user's business with geometric figure at real time in China Telecom Net Resource Management System (CTNRMS-GIS), the user's address data and related resources are required. In the construction of CTNRMS-GIS, we migrated address data into GIS (UNIX Server, Sybase database) from BSS (UNIX Server, Oracle database), using an FTP server according to an appointed file format, realized sharing address data between different platforms. We also analyzed the corresponding relationship between address data and telecom net resources. The construction of the GIS address system has allowed telecom net resources maintenance departments to strengthen their support services to the frontline operation departments in the telecom enterprise.
Quick response to customer needs, cost saving, and improved resource management are keys to maintaining the core competitive strength of a telecom enterprise. To show the state of resources occupied by a user's business with geometric figure at real time in China Telecom Net Resource Management System (CTNRMS-GIS), the user's address data and related resources are required. In the construction of CTNRMS-GIS, we migrated address data into GIS (UNIX Server, Sybase database) from BSS (UNIX Server, Oracle database), using an FTP server according to an appointed file format, realized sharing address data between different platforms. We also analyzed the corresponding relationship between address data and telecom net resources. The construction of the GIS address system has allowed telecom net resources maintenance departments to strengthen their support services to the frontline operation departments in the telecom enterprise.
2006, 31(5): 733-738.
Abstract:
Through the LBS (location based service) platform, spatial information data can be conformed and shared in LBS fields and the platform can provide integrated applications and services. The architecture of the LBS platform based on the SIG (spatial information grid) distributed model is discussed in detail in order to store map data and query location information. The interfaces of the LBS platform accord with the criterion of OpenLS and can be transported in HTTP communication protocol by XML code. The interfaces are discussed using many examples. Compared with the traditional pull mode, a new location notification method based on push is researched in this paper. The push mechanism can fit the need for high capability of data transformation and management, and transporting information between the LBS platform and applications. An example system based on MAPGIS and CDMA location technology has been designed and developed, validating the platform model and interface usability.
Through the LBS (location based service) platform, spatial information data can be conformed and shared in LBS fields and the platform can provide integrated applications and services. The architecture of the LBS platform based on the SIG (spatial information grid) distributed model is discussed in detail in order to store map data and query location information. The interfaces of the LBS platform accord with the criterion of OpenLS and can be transported in HTTP communication protocol by XML code. The interfaces are discussed using many examples. Compared with the traditional pull mode, a new location notification method based on push is researched in this paper. The push mechanism can fit the need for high capability of data transformation and management, and transporting information between the LBS platform and applications. An example system based on MAPGIS and CDMA location technology has been designed and developed, validating the platform model and interface usability.
2006, 31(5): 739-742.
Abstract:
The MapSuv System has extensive applications in GIS-based city construction. By virtue of the SUV data, 2D-map coordinates and virtual realistic technology, the SUV production expressions transform 2D into 3D by directly building a 3D virtual map based on metrical data such as spatial features and attribute information. This paper discusses the structure, data organization and system function of the SUV 3D simulation system, and introduces the data source, data disposal, foundation of model database and texture database, display and output of 3D visual map. This system integrates many technologies such as GIS, VRML, and mapping, which provide the function of data modeling, scene cruise, attribute inquiry and the provision of a 3D impression of a 2D map. This system has a short modeling cycle and the lower workload, which can be used in many fields such as city, planing, mapping, traffic etc.
The MapSuv System has extensive applications in GIS-based city construction. By virtue of the SUV data, 2D-map coordinates and virtual realistic technology, the SUV production expressions transform 2D into 3D by directly building a 3D virtual map based on metrical data such as spatial features and attribute information. This paper discusses the structure, data organization and system function of the SUV 3D simulation system, and introduces the data source, data disposal, foundation of model database and texture database, display and output of 3D visual map. This system integrates many technologies such as GIS, VRML, and mapping, which provide the function of data modeling, scene cruise, attribute inquiry and the provision of a 3D impression of a 2D map. This system has a short modeling cycle and the lower workload, which can be used in many fields such as city, planing, mapping, traffic etc.
2006, 31(5): 743-746.
Abstract:
The content of the column system is related to spatial positions. This paper presents a column system built on a GIS base to clearly show spatial relationships between the strata. According to the content and the representation of the graph, the column describes the geological entities by means of spatial data format, such as dots, lines and areas. The data organization of the system is accomplished by object-oriented methods. System functions are realized based on MAPGIS. System builds different traces to present the data, which has different attributes and operations. It has a friendly interface and provides templates to build the column. The system accomplishes a column by multiple descriptions of the strata.
The content of the column system is related to spatial positions. This paper presents a column system built on a GIS base to clearly show spatial relationships between the strata. According to the content and the representation of the graph, the column describes the geological entities by means of spatial data format, such as dots, lines and areas. The data organization of the system is accomplished by object-oriented methods. System functions are realized based on MAPGIS. System builds different traces to present the data, which has different attributes and operations. It has a friendly interface and provides templates to build the column. The system accomplishes a column by multiple descriptions of the strata.
